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95-102226
DEL MORAL & ASSOCIATES CE3T=. D Ecaoc;CAL COYSUIXA.NTS 2002 42ND AVENUE EAST SE.art , WASIQ\GTOY 98112 (206)323-7106 AS -BUILT DOCUMENTATION WETLAND CREATION AND BUFFER ENHANCEMENT: HERITAGE WOODS, FEDERAL WAY, WASHINGTON Prepared by: Dr. Roger del Moral, C.S.E. Signed: . del Nloral & Associates 2002 42nd Avenue East Seattle, Washington 98112 Phone: (206) 323-7106 F=_Y: (206) 328-9050 Prepared for: Mr. David Morrison ParkLane Ventures, Inc. 31620 - 23rd Ave. South Federal Way, Washington 98003 December 9, 1996 RECEIVED Ui �NET AYYjG P 1 j �ILi Introduction This report surrunarizes the plantings undertaken at the Heritage Woods site in order to develop compensatory wetlands and restore buffers. Owing to the protracted and complex planting history. necessary inid-course corrections, additional clearing beyond clearing limits, and unexpected hydrological conditions. the numbers and species of plants installed do not always correspond with the original plan. The City has also indicated that certain areas will not be counted as part of the wetland creation plan. This report includes two planting plans (' ti -1 & W- 2) that show the proposed and accomplished wetland areas and buffer areas and the proposed and actual numbers of plants installed. The number of plants installed and surviving to this date in each area are shown in this report. The report is organized as follows: The METHODS section describes how monitoring plots were established. or in the case sites where significant mortality or latter plantings occurred. will be established. This section also describes how plants will be measured, and where photos will behave been taken. Two RESULTS sections are included: one for creation and one for buffer enhancement. Each is organized by site to include these sub -sections: Description as stated in the approved report of October 23, 1995; description of necessary modifications and planting history of the site: sununary table of the approved plants (species and numbers), and the total number of plants (by species) surviving. This last number may include individuals planted at two or more episodes and does not include plants installed that appeared to be dead during as -built- and monitoring. I note that some of the plants considered dead in June. 1996. had recovered and were growing in October. 1996. The CONCLliSIONS indicates the summary of areas of wetland created compared to the approved plan. summarizes by species the numbers approved compared to the numbers installed. and makes recommendations for further maintenance and hydrology modifications to improve the success of the project. Methods On June 11. 1996. I performed an as -built investigation and initial monitoring for the Heritage Woods Project (Report to ParkLane. June 13,1996). Subsequently (September 19. 1996). I proposed additional plantings to replace losses noted in June. to bring the plan up to approved numbers. and compensate for conditions that differed from planned. These new materials were installed in October. On November 8, after field discussions with City Staff. further recommendations were made. These included the addition of Douglas fir to the detention buffer and various other minor additions. These were inspected in mid - November. This report documents the establishment of permanent plots, records the number of plants installed, compares the installations to the specifications from October 23, 1995, from my memo of April 5, 1996, and recommendations dated September 19 and November 8, 1996. In each of the planted areas I counted all individuals that were planted. I note whether or not the plants were alive or dead (or nearly so). These results are reported in tables and shown on planting Plan W-2. Where appropriate, I established permanent plots as follows: 1. Permanent plots,12 by 50 ft in Creation Area 1 and 25 by 50 ft. DEA-1, marked by four stakes; 2. Three permanent plots 30 by 50 ft in Buffer III and two permanent plots in Buffer IV, marked by stakes on either end of the plot; 3. Two permanent plots, 30 by 50 ft on the slopes of the detention, near Creation Area 1. All plants within the plots were tagged and the height of these plants measured. Additional monitoring plots will be established during March, 1997, for the following sites. Wetland creation areas A-4, A-5, A-7 and A-8. A-4 did not appear in June to have sufficient hydrology to merit detailed monitoring. However, this assumption has proven false. A-5 had not been constructed. A-7 had not been property graded. A-8 had significant failure in June due to unforeseen upland hydrology modifications and intensive grazing by geese. The hydrology condition has been corrected and plants replaced. Herbs less attractive to geese have been installed. In A-4, the monitoring plot will be 25 by 50 ft in size. Plants will not be tagged and simple, rather than paired statistics will be used. In A-5 two 20 by 30 plots will be established. In A-7, all plants will be measured and no plot established. In A-8, two plots will be established. The first, in the shrubs will be 20 by 50 ft and the second, in the herbs, will be 20 by 30 ft. Each will be centered in the plantings. In June, 1996, I also counted all individuals in A-4. The soil will be tested by auger in each wetland area during the March monitoring to determine the extent of saturation. Results —Wetlands The project was to provide a total of 22,825 s.f. of replacement wetlands and to repair vegetation within 100 ft of existing wetlands. Credit of 11,806 s.f. was allowed for the existing pond. Due to unforeseen complete filling of WL-E, an additional 2,178 s.f. of replacement is required (under a 2:1 replacement ratio), bringing the total to 25,003 s.f. WL-E is being restored in place, not replaced, so a 1:1 ratio is suggested. Due to unforeseen clearing within the buffer of off -site Wetland C, slopes of the constructed detention pond also required enhancement that was not included in the original mitigation plan. Table 1 is a revised form of Table 1 that was prepared and approved in the October 23, 1995, Wetland Mitigation Plan. TABLE I. Summary of impacted wetlands and buffers. (Revisions from Original Report. bold) Location Area (acre) Ratio Needed acres s.f. General Mitigation WETLAND A 0.11 1.9:1 0.210 9,148 Trees, shrubs, herbs patches WETLAND D 0.005 2:1 0.010 436 Trees & shrubs. WETLAND D 0.02 --- Enhancement with shrubs & herbs WETLAND E 0.05 2:1 0.10 4,356 Trees, shrubs, ferns (see above) WETLAND L 0.25 2.1 : 1 0.525 22,869 Trees, shrubs, herbs BUFFER AREA A 0.03 1:1 Trees, shrubs, ferns BUFFER AREA B 0.03 1:1 Trees, shrubs, ferns BUFFER AREA C and AREA D 0.26 1:1 Trees, shrubs, ferns BUFFER AREA E 0.06 1:1 Trees, shrubs, ferns DETENTION POND 0.45 1:1 Trees, shrubs Total Wetland Replacement Area needed: 36,809 S. f. Pond Mitigation Credit (From Table 2, Oct. 23, 1995, report): (11,806 s. f.) Total Wetland Creation Area now required: 25,003 s. f. All created wetland areas that deviated from the approved plan were flagged. The flagging was approved or modified by City's consultant on Dec. 3, 1996, and surveyed. Wetland Creation Area #1 As planned and approved AREA 1 (2,700 s.f.). This area occupies a north -facing slope. A 10 ft wide terrace will be created by filling along a 300 ft wide front to form a level area. The fill material will be underlain by a clay liner, and topped with top soil from other clearings in the vicinity. Hydrology will be augmented by collecting water from the biofiltration swale and detention pond, and releasing it along from a perforated pipe located along the top of this wetland. This site would be planted with salmonberry and red -osier dogwood in depressions. This will result in generally increased site productivity. The existing vegetation is dominated by red alder, osoberry, and Himalayan blackberry. The latter will be removed. As - Built This wetland was designed to be installed on a terrace near the foot of a slope on the north side of the property. The plan was to leave most of the canopy intact and under plant. Because the detention pond required longer slopes, the overstory was removed and all ground cover stripped. New soil was imported. This has resulted in substantially more stressful conditions than were anticipated. The soil was moist near the bottom of the plantings and dry up higher. The location of the creation area was shifted north. The irrigation augmentation has not been installed. Table 2 summarizes the plantings for this creation area. The plantings were moderately successful in June, and there remained more plants than specified. However, in September, plantings were not successful, owing to competition from the grasses and lack of hydrology. In October, after meeting with the City, it was deemed that this site was unlikely to sustain wetland hydrology. However, additional plantings were recommended. In the event that the area fails as a wetland, it still is part of the restoration of the adjacent buffer. No additional plantings are recommended at this time. This site is not counted towards wetland creation areas. Therefore, the area along the lower slope should be considered additional buffer enhancement. Plants were measured in the permanent plot. Salmonberry averaged 15 inches (n=26). Table 2. Summary for Creation Area 1. I Species # Specified October 1995 # Living June 1996 # Planted October 1996 # Counted November 1996 Salmonberry 20 58 30 38 Red -twig dozwood 10 0 0 1 Lady fern 30 21 0 30 Willows 0 0 10 10 TOTALS 60 79 40 79 Wetland Creation Area DEA-1 As planned and approved AREA A (3,525 s.f.). The DEA location should support a seasonal scrub -shrub wetland that will filter pollutants. In order to create adequate hydrology a flow shield will be installed to spread water from draining from WL-E, and wetland plants will be planted in slightly depressed holes. Shallow, horizontal channels will be dug to divert a portion of the flow onto this site. The channels will be lined with compacted clay. Other small depressions will be filled to reduce water loss. The 4 vegetation here consists primarily of facultative species. They will be augmented by willows, salmonberry, and lady fern, species capable of growing under the seasonally wet conditions to be created. As - Built Considerably more clearing around this wetland has occurred due to road construction. This has resulted in disruption of the original water source. Remedial action has been effected. A single permanent plot was established. The gully now has been filled in and stabilized. Water has been provided despite the unplanned disruption of Wetland E. The total area of the site was surveyed as 2,744 s.£, slightly smaller than planned. Table 3 summarizes the situation for this wetland area. No additional plantings are recommended for this wetland at this time. Within the permanent plot, the following sizes were determined in. June: red cedars, 35 inches (n=5); willows, 26 inches (n=8); salmonberry, 24 inches (n=17); red -twig dogwood, 19 inches (n=1). f Table 3. Summary for Creation Area DEA-1. Species # Specified October 1995 # Living June 1996 # Planted October 1996 # Counted November 1996 Red cedar 10 7 5 16 Willows 30 8 30 37 Salmonber 15 17 ? 31 Red -twig dogwood 0 4 0 3 Lady fern 20 9 0 19 Sword fern 0 0 0 25 TOTALS 75 45 35 131 Wetland Creation Area 4 As planned and approved AREA 4 (7,750 s.f.). This area adjacent to the pond is moist, with red alder, salmonberry and horsetails. In does not require additional moisture to establish wetland hydrology. Red cedar and willows will be planted in slight depressions, with a root collar for each planted individual, to ensure that wetland conditions occur. Habitat diversity will be increased by these species. Because of the presence of alder, any wetland developing here will be a forested wetland. It will, however, be heterogeneous, with local areas dominated by willows. R As - Built Table 4 summarizes all the plants installed in this area, as no permanent plot was established. In March, 1997, plots will be established. No plots were established because it was not clear that hydrology was established. This area was not changed from the approved plan. As -built area is the same as the design area, 7,750 s.f. The plantings were located slightly above the intended location, but have survived well. Many plants dormant or stressed in June, not counted as living, have recovered. The plants measured were: red cedar, 37 inches (n=3); willows, 27 inches (n=44); and salmonberry, 20 inches (n=8). (Table 4. Summary Creation Area 4. 1 Species # Specified October 1995 # Living June 1996 # Planted October 1996 # Counted November 1996 Red cedar 10 3 7 17 Willows 30 44 0 30 Salmonberry 21 8 13 60 Lady fern 21 16 5 25 Western hemlock 0 0 0 2 Osoberry 0 0 0 3 Sword fern 0 0 0 4 TOTALS 82 68 25 141 This site now has over 60 more plants than specified. It will be important to provide a source of water from above so that this plantings will survive. Wetland Creation Area 5 As planned and approved AREA 5 (3000 s.f.). This wetland will occupy the swale leading from WL-E and WI -A. Wetland hydrology will be achieved by minor excavations to spread the water draining from WL-E over a broader area. Plants will be placed into over -excavated pits, with collars surrounding each plant to retain water. The channel excavations will be lined with clay to reduce infiltration and ensure that water reaches the plantings. This wetland will be created by planting willows, dogwood and salmonberry. As -Built This wetland creation was expanded significantly after the original WL-E was destroyed during road building activities. The wetland creation area is upstream of WL-DEAI and includes an area formerly within a buffer mitigation zone. Table 5 summarizes the proposed plantings and the counted plantings. 6 Table 5. Summary Creation Area 5: number counted in November, 1996 Species # Specified October 1995 # L iving Lora+er # Living Central. # L iving Upper # Counted Nov. 1996 Western Hemlock 0 0 15 0 115 Willows 16 16 `? 42 58 Sahnonberry 20 19 6 36 5-5 Lady fern 0 3 0 0 3 Red -twig dogwood 8 6 0 0 6 Snowberry 0 0 12 0 12 Red elderberry 0 0 5 0 .5 TOTALS 44 44 17 78 1.54 The area covered by this wetland creation area is larger than planned. Jaeger surveyed an area 8.498 s.f., whereas the original plantings «-ere for 3.000 s.f. Wetland hydrology for the central and lower portions has been established through the use of a swale conveying water from WL-7. Hydrology for the upper portion is sustained by water from the toe of the slope and. by another route. from WL-7. These flows are shown in the -vvetland planting plan. Wetland Creation Area 7 As planned and approved AREA 7 (1495 s.f.). This site will be created by placing a flow shield at the low point. near the road. to raise the water table about 6 inches. This will expand the area with wetland hydrology by at least the stated amount. Vine maple (FAC) and osoberry are cominon on the margins of this wetland. \Villo\vs will be planted in the upper margins of this wetland, while lady fern and skunk cabba,,e will be planted along the boundaries of existing WL-F to augment its diversity. The created area is situated so as to be over 100 ft from lot lines. As - Built Initial plantings of skunk cabbage and ferns were successful, but subsequent erosion has left few plants intact. In October. 1996. the drainage was stabilized and additional plantings made. Subsequent plantings placed sword ferns instead of lady ferns. Excavations covered most of the herbs previously planted. The sword ferns were added in -November. The created wetland appears to overlap existing wetland. However, the existing wetland was an eroded gully. with no plants. The area now is level and 7 sustains wetland plants and hydrology. Also. it appears to me that. the placement. of survey flags was too conservative. To avoid buffer impacts. the created area south of the creek is not counted towards mitigation. resulting in 95 s.f. of w-etland. ITable 6. Summary Creation Area 7. 1 Species t Specified October 1995 # Installed November 1996 Red cedar 0 2 Willows 15 11 Lady fern 20 20 Skunk cabbage 20 22 Sword fern 0 20 TOTALS 55 r5 Wetland Creation Area 8 As planned and app roiled AREA 8 (43'15 s.f.). This area will be created by excavation adjacent to the pond. It will be planted in two zones: the deepest new area will be planted with slough sedge and small -fruited bulrushes. It is anticipated that cattails will invade any deeper areas. A scrub -shrub zone consisting of red -osier dogwood and willows will be planted in the shallower portions of Area 8. This portion will occupy 2.000 s.f. Emergent vegetation will occupy 2.375 s.f. The pond fluctuates slowly in response to rainfall and runoff. Suininer water levels may be lower than the level of Area 8 in late summer. The level of _-area 8 will be such that the deepest part will be 18 inches below- the high water level of the pond, which is similar to the depth of the pond. It will slope gradually to the high water level. at which point the surrounding berm or road will act as a dam. It. is anticipated that plantings will tolerate fluctuations within this range of variation. with emergent species planted lower and shrubs planted higher. Over time. the plants will expand or contract in response to the hydrology that develops. If the hydrology is found to be excessive during monitoring, remedial actions will be taken. The normal pond surface elevation during the wet season is 3 ; 2.2 ft.. while Area 8 is at 371.7 ft. It is possible that surface water from the pond that contains suspended sediments could flow into Area 8 and settle in the wetland creation area. In order to preclude this, a 12 inches high berm will be constructed between the pond and the wetland creation area. Only openings two ft.. long each 20 ft will be constructed to maintain hydrology. This berm is designed to prevent silt migration from the pond to Area S. As - Bu-ilt S The pond fringe was constructed extremely well. Hydrology appears to have been reestablished by connecting a drain to the pond. The berm and its openings are functioning as planned. Lack of hydrology caused considerable apparent mortality in dogwoods, though some have recovered. This lack was the result of water diversion in the uplands of the project. In early \ovember, the water was restored and the pond has begun to till. It is anticipated that hydrology will be sustained. Canada geese grazed many of the herbs planted. I deemed it imprudent to attempt species identifications of the herbs in their grazed state, but most survivors were slough sedge. Some rushes were planted and several have survived. Additional plantings to restore the numbers were made in November, and are reflected in the November count. Summary of proposals and as-builts is found in Table i. Table 7. Summary of installation for Creation Area S. Species # = Liz)in.g # # Counted Specified Planted Ji..ine Specified Noivinber- October 1996 1996 October 1996 1995 1996 j Willows 63 18 j 18 200 j 144 Red -twig dogwood 63 21 1 10 19 Herbs 360 not 90 300 348 (sedges/bulrushes) known TOTALS 486 -- 109 510 511 Note that most of the willows were dormant and that some appear to be volunteers. Note also that the number of herb species includes recovering individuals planted in spring. newly planted slough sedges and emergent FAQ"W or OBL graminoids that have established naturally. It. is not known exactly hocw many additional willows or herbs were planted. Also note that this area has been invaded by cottonwoods and that the berm and other bare areas have successful willow. Mean size for 18 willows found in June was 2'1 inches. The expected area was 4.375 s.f.. while the surveyed area is 6,633 s.f. Most of the additional area is on the periphery that has been colonized by iwetland herbs and willows. E Enhancement Area D As planned and approved The DEA plan called for enhancement of 0.02 acre (870 s.f.) of wetland D. This will be accomplished in a disturbed portion of this wetland. Here, fast growing willows, red cedar and red -osier dogwood will be planted. No herbs are needed since they already occur. Table 8 summarizes the proposed and counted areas. Table S. Summary of installation for Enhancement area. Species # Specified October 1995 # Counted November 1996 Red cedar 3 2 Pacific willows I 5 0 Red -twig dogwood 3 0 Salmonberry 0 7 Lady fern 0 3 Total 11 12 As - Built The differences in plantings resulted from analysis in October of the actual conditions. Different species were proposed to match the site more closely. The vegetation is quite dense and the opportunities for enhancement are more limited than they appeared last year. The vegetation was dense, but it appears that 2 red cedars, no willows or dogwoods, 7 salmonberries and 3 lady ferns were planted. Hydrologic Discussion Wetland creation projects require coordination of appropriate plant materials, appropriate hydrology and appropriate soils. Under normal circumstances in this region, soils will develop hydric properties as higher organic content relatively quickly if the appropriate hydrology is maintained. The abilities of plant species to grow under various hydric regimes are relatively well known, though there is some variability in individual responses and genetic potential. Wetland hydrology is usually the most difficult parameter to predict, and is less readily manipulated. On the other hand, it is relatively easy to fine-tune the 10 hydrology of a project in several ways. For example, outflow levels can be adjusted up or down by adjusting the level of overflows or drainage culverts. Local hydrology can be enhanced by raising the level of berms, installing small berms, or planting material in local (dug) depressions. In order to improve wetland hydrology, soils of the wetland creation areas were to be amended with organic matter or hydric soil. This section describes the hydrological conditions of each wetland area discussed above. The discussion is based on field observations, existing status of the creation site based on existing vegetation, and observed water flow patterns. This project will be monitored for five years. One aspect of monitoring will be to determine if appropriate hydrology is being maintained. AREA A. Plan: This site was identified by DEA as a feasible wetland creation site. It receives water intermittently draining from WL-E. It is on a moist, north -facing, relatively gentle, slope. Wetland hydrology will be created by installing a flow shield to increase the retention time of water behind it, by planting in depressed pits, and by shallow, horizontal channels dug from the drainage. The channels will be lined with compacted clay, and backfilled with the surface material. The current vegetation dominated by red alder and salmonberry will easily survive this hydrological enhancement. New plants will be placed in depressed planting holes with collars. If wetland hydrology fails to develop, the flow shield will be increased in height. Actual: The drainage has been stabilized and water provided from a continuation of the flows from WL-5. There appears to be adequate hydrology for the development of this wetland site. Further fine-tuning is possible in that water may be spread more effectively and the outlet raised slightly. AREA 1. Wetland hydrology has not been established and this area is no longer considered as part of the wetland creation mix. However, the addition of water as described above and shown on the plan could, in the future, enhance the hydrology sufficiently to sustain wetland conditions. AREA 4. Plan: It receives water primarily from sheet flow down the slope and from WL-D. Wetland hydrology can be established for the plantings by installing them 2 inches below grade, with a planting collar to enhance moisture collection. This area is nearly wetland and it is very unlikely that any failure due to inadequate hydrology will result. Actual: Road clearing removed some of the vegetation, but the site still receives significantly sheet flows. This hydrology may require fine-tuning during the Spring in order to support hydrophytic vegetation and saturation into mid - spring. 11 AREA 5. Plan: Hydrology for this area will be enhanced by the flow shield described for Area A, but the primary modification will be the excavation of small, shallow channels to divert water from the channel that drains WL E. The excavations will be lined with clay to reduce infiltration and ensure that water reaches the plantings. The current vegetation is dominated by facultative species (red alder, salmonberry) common in wetlands. New plantings will be interspersed with existing vegetation, planted in depressed holes with collars. Actual: Area 5 now is significantly larger and receives water via a swale from Area 7 and from a channel from Area 7. Wetland hydrology was only recently established and it is impossible to determine its extent or duration. AREA 7. Plan: A flow shield similar to that of Area A will be installed to increase water levels about 6 inches. This will permit water to spread out over the lower creation area. Existing vegetation is Facultative. This area is adjacent to WL-F, and the minor hydrological modification will create the required hydrology. Actual: The wetland drainage has been stabilized and filled. The hydrology is adequate and the site remains saturated. The channel was blocked to maintain adequate hydrology for this site. AREA 8. Plan: Excavation will create hydric connection to the pond. Pond levels fluctuate slowly, and are lowest in late summer. There is little erosive force. A berm across the opening will be maintained at 12 inches above the normal water level of the pond with several openings. This will minimize sedimentation from the pond. If monitoring shows that water is lost from Area 8, it can be augmented by redirecting inflows to the wetland. Actual: Hydrological modifications were as intended. The pond dropped sooner and lower than anticipated due to unforeseen upland events. The hydrology has been re-established and it is likely that this area will retain sufficient hydrology. Results —Buffers All buffer zones were hydroseeded as required. The hydroseeding has been successful. For the detention pond grasses and clover cover over 90% of the entire area. There has been natural invasion of red alder in places and, in scattered locations, black cottonwood has developed strongly. The other buffers were seeded later and are developing more slowly. Natural reseeding of weedy vegetation has also occurred. Prominent among the natural invaders is red alder, which is common in the immediate surroundings. This species routinely invades barren sites with low fertility. 12 Detention Area Buffer This enhancement was not part of the original plan. It became required because the graded areas are within buffers for off -site wetlands. The area covers about 24,000 s.f. and occupies most of the northern and western slopes of the detention pond. Initially, I proposed plantings of snowberry and roses as shown on the plan. Subsequent discussions with City Staff led to the addition of 90 Douglas firs as sketched on the plan. These were initially specified as 6 ft plants. Discussions with the contractor indicated that robust 4 ft plants would survive better under these conditions, and these were installed. Planting details for this area: 375 plants, arrayed into 75 clusters of 5 are required. The spacing will look like the spacing of dots on the "5" face of a die, at 4 ft spacing from the central plant. Species: Snowberry (Symphoricarpos albus) shall form the majority of the plantings. This species has broad tolerances, is present in the vicinity, provides attractive fruit for birds, and perches to attract additional birds. The presence of birds increases the rate at which soil fertility increases. Sixty clusters, 300 plants, are required. Along the lower slopes, and in particular below the wetland creation area, Nootka rose (Rosa nutkan a) shall be planted. This species grows more slowly than snowberry and requires somewhat more moisture. Fifteen clusters, 75 plants, are required. Ninety Douglas fir (Pseudotsuga menziesia) shall be planted in three rows along each slope, with 60 on the west, and 30 on the north. They shall be spaced to avoid planted shrubs. As - Built Snowberry and Nootka rose were planted in clusters of 5 on this slope. Two permanent plots were established. In response to City comments, Douglas fir was added to the mix. The detention pond slopes are now covered with grass, clover, dense snow berry, roses on the lower slopes, 4 ft Douglas fir, and a variety of desirable invaders, including black cottonwood. The lower north slope also has salmonberry in the creation area that is now considered to be upland. Table 9. Summary of installation for Detention Pond buffers. Species # Specified 1996 # Planted 1996 # Counted November 1996 Douglas fir 90 I 90 90 Snowberry I 300 345 324 Nootka rose 75 90 73 TOTALS 465 I 525 487 This buffer enhancement appears very successful and fulfills the requirements. The mean value for snowberry in Permanent Plot 1 was 25 inches 13 i (n=30). In Permanent Plot 2 it was 27 inches (n=27). No roses occurred in the monitoring plots. Roses and Douglas fir will be monitored in March, 1997. Buffer I As planned and approved BUFFER I. Along Military Road (2,610 s.£). A single row of Douglas fir will be planted near the property line. Red cedars will be spaced between the firs and set back. These two species will provide an evergreen screen. Snowberry, a rapidly growing plant that grows well under these conditions, will augment the trees. As - Built This buffer was planted in October 1996. Because the wetland for which it was a buffer has been moved and the overstory destroyed, this buffer vegetation has been placed along the lower slope of the bank along Military Road. It will form an evergreen screen for the plantings of Created Wetland 5. This planting occurred in two parts: the lower slope of the bank was planted with 50 Douglas fir in two rows and 138 snowberries. The remaining species were located on more level terrain. These plantings looked healthy when surveyed. No monitoring plots were installed because the ground was soggy and little growth is expected during the winter. Monitoring will commence in March, 1997. Table 10. Summary of installation for Buffer I. 1 Species # Specified 1995 # Counted November 1996 Douglas fir 26 53 Snowberry 52 308 Red cedar 26 26 Osoberry 0 5 TOTALS 465 492 Buffer II As planned and approved BUFFER II. This buffer restoration is needed due to the construction of a portion of the drainage system. The central excavated area will be planted with the seed mix. The central 10 ft will not be planted with woody species to provide for maintenance. It is expected that red alder, etc., will recolonize naturally. Red cedars, snowberry, red elderberry, osoberry, and sword ferns will be as shown on the planting plan. This results in a total of 47 plants. 14 As - Built BUFFER II is a small area leading from the sewer line up to Military Road. Within 100 ft of the wetland, it was revegetated according to plan, with slight modifications. Primarily, red cedar was replaced by western hemlock in recognition that the site was drier than anticipated. f Table 11. Summary of installation for Buffer TT. f Species # Specified 1995 # Counted November 1996 Red cedar 8 0 Western Hemlock 0 8 Snowberry 17 17 Red Elderberry 5 1 Sword fern 17 17 TOTALS 47 43 Buffer III As planned and approved BUFFER III is the largest enhancement. This portion of the storm drain extends for 400 ft. It will be planted with western hemlock in the overstory, along with snowberry, osoberry, red elderberry, and sword fern. A few vine maples in wetter spots will be planted. As - Built BUFFER III was planned to compensate for a narrow access road. The installed road is wider. In April, additional plantings were recommended to compensate for the wider road. In some cases the numbers counted exceed the number planted in April plus the number specified in October because more plants were planted than specified. Additional plantings were made in the eastern extension of Buffer III. These were plants included in the total specified in April 1995 (Table 12, col. 2). Several snowberry plants and some elderberry plants were recorded as dead, but they may be merely dormant. The total is slightly less than specified, but this is a result of exclusion of plants in the extension of the buffer, shown in Wetland Area 5. 15 Table 12. Summary of installation for Buffer 111. I Species # Specified Oct.1995 # Planted April 1996 Living June 1996, # Specified f October 1996 # Counted November 1996 .Douglas fir 0 9 9 30 31 Western :hemlock 64 43 29 10 35 :Red cedar 12 5 5 10 24 Osoberry 12 0 0 15 10 Red elderberry 22 10 8 20 15 Willows 0 0 0 0 4 ,Snowberry 100 65 57 50 86 ,Salmonberry 0 13 13 10 33 Sword fern 88 116 102 20 65 TOTALS 375 165 149 I 165 303 Table 13 shows the sizes of plants in the permanent plots of Buffer III. Table 13. Summary of mean sizes of woody plants in Buffers III and IV. Buffer III- #1 #2 #3 Buffer IV- #1 #2 Species n x n x n x n x n x Douglas fir 7 20 Western hemlock 10 20 6 22 3 43 5 51 Red cedar 5 36 Snowberry 16 24 7 22 f 5 32 3 29 Red elderberry 1 22 2 16 1 11 Salmonberr_y 7 25 Willow 1 42 Buffer IV As planned and approved The planting plan for this buffer was similar to that for Buffer III. As - Built The soil of this area has been compacted, so growing conditions were not good. The surface was scarified to improve natural regeneration and water infiltration. In October and November, additional plantings were made. The November totals are similar to the original specifications, and the plants look r healthy. As a result of the additions. more. healthier plants oCrur oil this strip. Table 14 suirunarizes the plantings. Table. 14. Summary of installation for Buffer IV I Species # Specified October 1995 - Planted April 1996 Liuing :June 1996 Specified October 1996 # Counted November 1996 Douglas Fir 0 0 0 20 19 Western hemlock 25 30 22 10 24 Osoberry J8 0 0 10 10 Red elderberry 1 8 5 5 5 7 Snowberry 1 36 21 16 25 42 Sword fern 50 30 15 1 40 51 TOTALS J 127 1 86 61 110 153 Buffer V This buffer enhancement is necessary because of a slightly larger than anticipated clearing by lots 57 & 58. The resulting necessary area is 10 ft by 110 ft. or 1,100 s.f. The plants to be installed in early spring are: 8 red elderberry. 10 snowberry. and 10 western hemlock. spaced in 2 staggered rows, and mixed randomly. These plants will all be measured during monitoring. Conclusions The wetland creation and buffer enhancement has been completed. All areas have been planted. with only a minor amount of fine-tuning required. The planting areas were marked by Jim Jaeger and surveyed. These areas are somewhat different than those approved and planned. but are substantially similar and provide adequate compensation for any lost values. Table 15 summarizes the planned wetland creation areas and compares them to the areas surveyed. It appears that there is sufficient wetland creation to meet the area objectives. 17 Table 15. Approved and required wetland areas compared to surveyed sizes of created wetlands. Creation Area Original Area Required (s.f.) Surveyed Area (s.f.) WEA-A 3525 2744 WL-1 2700 0 WL-4 7750 7750 WL-5 3000 8498 WL-7 1475 95 WL-8 4375 6633 Sub -TOTAL 22,825 Additional-WL-E 2178 TOTAL 25,003 25,720 R w 'A Z oN M xx f �7 J cq ,... GC ^7 C :.i tell � W v ac 'T Z.N cl. L., M Ja .�. \11 V — ^ � U r' f j C f. ^• C 3 ,,, • ^ O — r i During the monitoring period, vegetation manageinent should concentrate on the removal of potentially destructive species. In buffers, both Himalayan blackberries and Scot's broom should be removed. In particular. the Scot's broom in the buffer of the detention pond should be pulled early in the Spring. In wetlands. invasive species such as rushes and willow herbs are allowable. There is no indication that reed canary grass will become a problem. but if it appears, especially in Area 8, it should be removed. Signs of erosion should be monitored and corrected quickly if observed. The existing hydrology appears adequate to sustaining the plantings. However. some fine-tuning may be necessary. The water entering Area DEA-1 may require more spreading out. Water being delivered to Area 5 may require to be spread more evenly. Water for Area 4 may be channeled from Area 7. The pond level should be maintained to provide adequate hydrology for Area 8. Each of these is a minor alteration and, except for the latter, can be achieved simply with hand -tools. This concludes my as -built report. In March. 1997. Buffer V will be installed. the remaining permanent plots will be installed. plants will be measured. photographs taken, and hydrology determined. Recommendations for hydrological modification and more detailed maintenance will be made at that time. Golder Associates Inc. 4104 -148th Avenue, N.E. Redmond, WA 98052 Telephone (425) 883-0777 Fax (425) 882-5498 November 13,1998 Schneider Homes 6510 Southcenter Blvd., Suite 6 Tukwila, Washington 98188 ATTENTION: Mr. Dennis Alfredson RECEIVED = Q` N 0 V 16 1998 = Golder Associ�e FEDERAL WAY PtiBLIC iVr s ADMfN101R iTION DIVISION RE: CONSTRUCTION MONITORING SUMMARY REPORT HERITAGE WOODS LOTS 52 TO 58 FEDERAL WAY, WASHINGTON Dear Dennis: Our ref: 983-1216.000 Golder Associates Inc. (Golder) is pleased to present this summary of our field observations and testing on the Heritage Woods project. The project involved the filling to grade of seven single family building lots, numbered 52 through 58 in Tract H and J. The geotechnical recommendations for the lot grading were presented in our geotechnical report dated April 14,1998. The civil grading plan was prepared by Jaeger Engineers. The work involved the placement of thick structural fills against a steep slope to create the building pads and yards. Significant geotechnical issues requiring our observation and testing included the following: Removal of mud and debris from the area of the previous slope failure, • Installation of a sand drainage blanket, • Benching of structural fill into the native slope, • Compaction testing of the structural fill and, • Observation and testing of the reinforced fill rockery at the toe of lots 57 and 58. A member of our geotechnical staff was on -site throughout construction from August 25 to October 2,1998, initially on a full-time basis, and then switching to part-time observations once the contractor was able to demonstrate consistent compaction and began routine fill placement. Our construction monitor completed daily field reports of his observations and compaction test results. During the coarse of the work, copies of these reports were provided to Schneider Homes and the City of Federal Way's inspector, Mr. Jim Pryal. OFFICES IN AUSTRALIA, CANADA, GERMANY, HUNGARY, ITALY, SWEDEN, UNITED KINGDOM, UNITED STATES November 13,1998 2 983-1216.000 Our field observations and testing indicate that the contractor completed the work in substantial compliance with our geotechnical recommendations and the civil grading plan. Wetrust this letter meets your needs. If you have any questions, please give us a call. Sincerely, GOLDER ASSOCIATES INC. ames G. Johnson Associate Engineering Gee' --` Ri6ard . Luark, P.E. Associate Engineer JGJ/RDUslt 1022»l.aa Golder Associates ii I schneider homes, inc. 6510 Southcenter Boulevard•Suite #1 •Tukwila, WA 98188•(206) 248-2471 •FAX (206) 242-4209 May 12, 1998 Stephen Clifton City of Federal Way 33530 1st Way S Federal Way, WA 98003-6221 Re: Heritage Woods Division II Pavement Section Dear Mr. Clifton: Construction is underway at Heritage Woods Division II. In three or four weeks, we will be paving the streets. We would like to propose a change to the paving section. Schneider Homes proposes that we place a four -inch lift of ATB (asphalt treated base) in lieu of the four -inch crushed rock course. An incidental benefit of using ATB is that it is more structurally sound than crushed rock. However, the primary motivation is that the ATB will serve as the driving surface during the remainder of construction, including house construction. When construction is finished, or nearly so, the surface is rolled, inspected, and the failed sections removed, including the subgrade. The failed subgrade is then replaced with imported material, and new ATB is placed. Finally, the final lift of two inches of Class B asphalt pavement is placed. This procedure has the advantage of leaving the finished development with a clean, unbroken, and structurally sound pavement. It would avoid a patchwork pavement such as what has resulted in Division I. (That pavement, incidentally, will certainly end up looking worse than it does already, when, at the end of the project, we address the City's punch list and repair the failed sections of pavement.) However, using this procedure will require you to allow the plat to be recorded prior to the final lift of pavement being placed. Naturally, we would provide the City with a bond for this work. This procedure is currently followed when constructing plats in King County, as well as most cities. SC-HN-EI-245 PB Using this method does not save us money. On the contrary, it is more expensive. We do it solely because it results in a finer, more attractive, finished community. I look forward to receiving your response. Respectfully, SC ER HO S, INC. r.. ennis Al dson, P.E. Manager of Development & Construction Reallyle my r _~' COMMUNITY DEVELOPMENT DEPARTMENT OCT 2 5 IM DEL MORAL & ASSOCIATES GERM ED ECOLOGICAL CONSULTANTS 2002 42ND AVENUE EAST SEATTLE, WASHINGTON 98112 (206)323-7106 FINAL WETLAND CREATION AND BUFFER ENHANCEMENT PLAN: HERITAGE WOODS, FEDERAL WAY, WASHINGTON Prepared by: Dr. Roger del Moral, C.S.E. Signed: 2-05_As'� del Moral & Associates 2002 42nd Avenue East Seattle, Washington 98112 Phone: (206) 323-7106 FAX: (206) 328-9050 Prepared for: Mr. David Morrison ParkLane Ventures, Inc. 31620 - 23rd Ave. South Federal Way, Washington 98003 Revised Octobei'2,8, 1995 Table of Contents Topic Page Tableof Contents.................................................................................................... ii Preface.................................................................................................................... iii Introduction -- Project Description......................................................................... 1 Summary Description of Wetlands ..................... ........... .............. ............................ I Locations and Sizes of Existing Wetlands...................................................1 General Planting Concept............................................................................3 Hydrologic Discussion.................................................................................5 Buffer Enhancement....................................................................................7 MitigationGoals......................................................................................................8 ExistingConditions ...... ............................................................................................ 9 Functions & Values of Existing Wetlands...................................................9 Impactto Wetland & Buffer........................................................................9 MitigationPlan ......................................................................................................10 Location of Restoration Areas...................................................................10 Site Topography Before & After Construction..........................................10 Hydrological Patterns.................................................................................10 Restoration.................................................................................................11 Locations........................................................................................11 Wetland Creation Sites..................................................................11 Wetland Enhancement Site............................................................12 Buffer Restoration Sites.................................................................12 SowingMixes................................................................................15 Biofiltration Swale.........................................................................15 PlantingNotes............................................................................................15 Maintenance Plan .......................................................................................16 Creation & Buffer Sites................................................................. 16 Pond Maintenance..........................................................................17 Mitigation Plan Schedule...........................................................................18 Performance Standards and Criteria......................................................................19 MonitoringPlan .....................................................................................................19 Contingencies........................................................................................................21 BondingRequirements...........................................................................................22 PlantMaterials...........................................................................................22 InstallationCosts........................................................................................23 Monitoring & Supervision Costs...............................................................23 Summary................................................................................................................24 LiteratureCited......................................................................................................24 Disclaimer..............................................................................................................24 Appendix I. Summary of Ecological Characteristics.............................................A ii Preface This report incorporates and responds to comments made to Mr. David Morrison, of ParkLane Ventures, Inc., by Mr. Greg Fewins, Senior Environmental Planner for Federal Way, concerning the wetland restoration plan of April 27, 1994, and by Jim Harris, Associate Planner, on July 6, 1995. It also responds to comments made by Mr. Keith Fabing, W & H Pacific, concerning the plans of June 7, 1994, and June 15, 1995. The plan was revised and submitted on September 1, 1995, to reflect these comments. Subsequent to meetings among Mr. James Jaeger, Mr. Jim Harris, and Mr. Keith Fabing (now with Adolfson Associates), the plan revised and clarified. This document describes the Final Mitigation plan, includes revised site plans and planting plans, and addresses issues raised by Mr. Fabing (see his memo to Mr. Harris dated October 4, 1995) and the decisions as documented by Mr. Jaeger in his memo to Mr. Harris, dated October 6, 1995. The City of Federal Way requires that a Final Wetland Mitigation Plan be approved by the Director of Community Development before any site work commences, and that the plan shall include the following: a) environmental goals and objectives, including public access and buffer measures; b) performance standards; c) detailed construction plans; d) schedule and timing of construction and related measures; e) five year monitoring plan; f) contingency plan, and g) performance bonding at 120% of costs of implementing each of the above elements. The City of Federal Way requires that mitigation shall improve the functions and values of impacted wetlands and buffers. The replacement ratios are 3:1 for forested wetlands, 2:1 for scrub -shrub wetlands, and 1.5:1 for emergent wetlands. The rationale for these ratios includes that created wetlands cannot ordinarily be expected to develop quickly all the functions and values of the replaced wetlands, so that additional size is stipulated. Wetland creation cannot be expected to be completely successful in each case, so contingency plans are provided. Wetlands may be successfully created, but not all portions of the created wetlands may function as planned. For all these reasons, replacement ratios greater than 1:1 are reasonable. Most of this wetland creation project is to replace Wetland L (as designated by DEA), a mixed -class wetland of 0.25 acre. Based on my calculations, using appropriate City of Federal Way ratios for each class, this wetland would require replacement at a ratio of 2.1 to 1. On this same basis, WL-A would require a ratio of 1.9 to 1. I have used these ratios to determine area replacement. Replacement wetlands have been designed to result a mix of wetland classes. However, the City also requires higher wetland values. Higher values can be obtained by replacing low value, successional emergent wetlands with wetlands of greater species and structural diversity. Therefore, exact "in -kind" replacement is not specified, but departures are always in the direction of greater wetland value. On May 10, 1995, and on June 29, 1995, Mr. Keith Fabing provided useful comments on the Mitigation Plan. I met with Mr. Fabing in the field on May 24, 1995, to resolve some of the issues in question. Here is a summary of how issues are treated in this report. Each of the required elements of a mitigation plan is described in this report. Engineering and drainage plans have been prepared by Jaeger Engineering. Landscape design plans, iii including planting plans, have been prepared by Weisman & Associates. Both of these docu- ments are the product of collaboration among Jaeger, Weisman, and del Moral. In some cases it is not possible to provided detailed back ground information that would provide a higher degree of predicted success. For example, quantitative estimates of adequate hydrology cannot be made in most cases due to the small size of the sub -basins and the impor- tance of slopes and local topography to create wetlands. The adequacy of hydrology is dis- cussed, based on location of the wetland, associated topography and alterations of drainage. Soils have been investigated and percolation rates determined. Contingencies are provided in the event that hydrology proves insufficient during monitoring. Mr. Harris has determined that Wetland Area 2 and the Pond End will not be part of the mitigation plan. Mitigation (revegetation) in Buffer 2 will be part of the plan. The plant schedules have been adjusted to reflect these modifications. Further discussion of ratios, etc., have been deleted from this report. The wetland areas will be hydrologically interconnected. They include: • Area 8, 4,375 s.f. of PEM and PSS wetland, created by shallow excavation; ■ Area 4, 7,750 s.f. of PFO wetland, created among existing facultative species, by planting new material in deeper pits, with collars to retain water; • Area 7, 1,475 s.f. of PSS wetland to expand an existing wetland, created by minor channels to spread water over a larger area (note: the location of this area has been changed to avoid impacts of its buffer on any proposed building lots); • DEA A, 3,525 s.f. of PFO wetland, created by a small berm to impede flows and small benches to spread water over a wider front; • Area 5, 3,000 s.f. of PSS wetland, created by planting in deep holes, with small diversion channels spreading water from water flowing down hill; and • Area 1, 2,700 s.f. of PFO wetland, created by installing small berms to impede the broad flow of water on this north -facing slope. Wetland Creation Areas 2, 3 & 6, and the Pond creation area have been deleted from this proposal and Wetlands 1 and 5 have been reduced in size from earlier proposals. While the Pond will not be augmented, it is considered to be part of the mitigation. This pond provides credit for 11,806 s.f. of mitigation. iv INTRODUCTION -- PROJECT DESCRIPTION This report provides the information to complete successfully a wetland mitigation proj- ect for Heritage Woods. David Evans & Associates (henceforth DEA) prepared a wetland de- lineation and evaluation report (DEA 1992) that was accepted by the City of Federal Way. However, their regulatory analysis was not accepted, resulting in 0.36 acre of additional regu- lated wetland on the site. This report details mitigation actions to compensate for filling Wetlands A & L, and for minor construction impacts to other wetlands and buffers of certain wetlands. This report summarizes impacts resulting from filling Wetlands A and L, as well as minor impacts to Wetlands D & E and to buffers resulting from the construction of the drainage system proposed by ParkLane Ventures. The bulk of this report is a description of mitigation actions to replace lost wetland values and functions. This report also evaluates wetland classes found in those wetlands that will be impacted so as to determine the appropriate replacement ratios for each wetland. This report establishes the locations for the replacement wetlands and details the enhancements and wetland creation required to offset the unavoidable impacts of this project. All elements required by the MDNS are included. This report incorporates comments made by the City of Federal Way and its consultants up to October 13, 1995. Along with plans prepared by Jaeger Engineering and Weisman & Associates, it constitutes the Mitigation Plan. SUMMARY DESCRIPTION OF REPLACEMENT WETLANDS Locations and Sizes of Existing Wetlands The following wetlands occur on -site (Fig. 1). The nomenclature is that of DEA. WL-A is an isolated wetland consisting of 0.11 acre of mixed palustrine forested, scrub - shrub and emergent wetland. This wetland will be filled. The DEA report indicates an overstory of 95% red alder, a shrub layer of 40% hardhack, and an emergent zone of 25% slough sedge. Their marginal notes indicated that the wetland is 80% slough sedge, 70% red alder canopy and 10% hardhack. My observations in April, 1994, indicated that most of the red alder is in the upland (associated with species such as red elderberry and sword fern). For the wetland as a whole, my conservative estimate is that it is 20% forested, 20% scrub -shrub, and 60% emergent wetland. As a result, a weighted replacement ratio of 1.9 to 1 is calculated. In order to replace this 0.11 acre, therefore, 0.21 acre is required (Table 1). In -kind replacement of this wetland would require 0.066 acre of forested wetland, 0.044 acre of scrub -shrub wetland, and 0.099 acre of palustrine wetland (rounded to 0.100 acre). WL-C is 0.19 acres of a mixture of forested (red alder) and scrub -shrub (sahmonberry) wetland associated with a stream course, and will not be disturbed. WL-D occurs in two depressions and is connected to the pond. The description of this wetland by DEA is not detailed. It also includes some red cedar, salmonberry and red alder. A total of 0.005 acre of WL-D will be impacted by the drainage system. Replacement at a 2:1 ratio is appropriate. In addition, sewer line construction will temporarily impact 0.02 acre of WL D. It will be enhanced upon completion of construction as described below. 1 WL-E is a narrow drainage dominated by non -wetland species. There is some salmon - berry and dogwood along the corridor, so it is rated as a scrub -shrub wetland. A total of 0.025 acre will be filled during road widening and replaced by a total of 0.05 acre of wetland trees and shrubs. WL-F is a disturbed emergent wetland dominated by skunk cabbage and water cress. There is vine maple and sword fern near by. It will not be disturbed. WL-L is a mixture of red alder, hardhack and slough sedge. DEA sampled this wetland in November, and noted no herb layer. They did not evaluate this wetland in terms of propor- tions by class. The wetland actually is dominated by open water and slough sedge (40%), with about 30% dominated by shrubs, and 30% by red alder. This wetland will be filled, so that mitigation must compensate for lost functions and values. The required area for this compensation has been discussed thoroughly with City officials and consultants. A ratio of 2.1 to 1 has been agreed to, based on the proportion of each wetland class in this wetland. The City of Federal Way requires mitigation ratios dependent upon the nature of the wetland being impacted. Normally, forested wetlands are replaced at a 3:1 ratio; scrub -shrub wetlands are replaced at a 2:1 ratio and emergent wetlands at a 1.5 to 1 ratio. Table I summarizes the size of impacts of this project on wetlands and buffers, indicates the appropriate replacement ratios and the area required to achieve that ratio. TABLE 1. Summary of impacted wetlands and buffers. Location Area Ratio Needed General Mitigation (acre) acres s.f. WETLAND A 0.11 1.9 0.210 9,148 Trees, shrubs, herbs patches WETLAND D 0.005 2:1 0.010 436 Trees & shrubs. WETLAND D 0.02 --- Enhancement with shrubs & herbs WETLAND E 0.025 2:1 0.050 2,178 Trees & shrubs WETLAND L 0.25 2.1 :1 0.525 22,869 Trees, shrubs, herbs BUFFER AREA A 0.03 1:1 Trees, shrubs, ferns BUFFER AREA B 0.03 1:1 Trees, shrubs, ferns BUFFER AREA C and AREA D 0.25 1:1 Trees, shrubs, ferns BUFFER AREA E 0.06 1:1 Trees, shrubs, ferns Total Wetland Replacement Area needed: 34,631 s.L 2 General Planting Concept The location for created wetlands is shown on the Weisman Planting Plan, which also shows all buffers. Detailed sizes and location are shown on the Jaeger Engineering Plans. Buffers will be restored where they have been disturbed. Table 2 describes wetland creation locations, their sizes and wetland class. Because the wetlands on this site are small and because most of the remaining site is not level, it is not possible to locate the replacement wetland in a single patch. Therefore, it has been necessary to augment the hydrology to create wetland conditions. Nomenclature is historical to facilitate comparison to earlier reports. TABLE 2. Summary of wetland creation, size and replacement type, listed in descending order of ease of creation. Name of Area Size (s.f.) Type' Area 8, adjacent to pond 4,375 PEM PSS Area 7, west of WL-F 1,475 PEM PSS Area 4, east of WL-D PFO DEA Area A, drainage E 3,525 PSS Area 5, North of WL-E 3,000 PSS Area 1, N. of detention pond 2,700 PFO Total Area: PEM = 3,375 s.f. PSS = 9,000 s.f. PFO = 10,450 s.f. Pond Mitigation Credit: Total Mitigation Dominant Species (2,375 s.f.) sedges; bulrushes (2,000 s.f.) dogwoods, willows (1,000 s.f.) lady fern, skunk cabbage (475 s.f.) willows (7,750 s.f.) red cedars, willow (3,525 s.f.) willow, salmonberry, lady fern (3,000 s.f.) willow, dogwood, salmonberry (2,700 s.f.) salmonberry, dogwood; cedar SUBTOTAL = 22,825 s.f. 11,806 s.f. 34,631 s.f. ' PFO = palustrine forested wetland; PSS = palustrine scrub -shrub wetland; PEM = palustrine emergent wetland. This replacement area has been approved by the City of Federal Way (See memo from Mr. Harris to Mr. Morrison, October 13, 1995). The areas we anticipated for mitigation of impacts to WL-L had been assigned to creation Area 2 and to planting wetland plants on the edge of the pond. These areas have been compensated for by recognition that the Pond serves wetland functions and will compensate for these loses. The Pond mitigation credit totals 11,806 s.f. and brings the total for the mitigation plan up to the required area 34,631 s.f. Water entering the pond from general drainage leaving the plat shall be pre-treated with an oil/water separator and with catch -basins containing sediment sumps prior to entering the existing pond. 3 The following describes each creation areas. AREA 8 (4,375 s.f). This area will be created by excavation adjacent to the pond. It will be planted in two zones: the deepest new area will be planted with slough sedge and small -fruited bulrushes. It is anticipated that cattails will invade any deeper areas. A scrub -shrub zone consisting of red -osier dogwood and willows will be planted in the shallower portions of Area 8. This portion will occupy 2,000 s.f. Emergent vegetation will occupy 2,375 s.f. The pond fluctuates slowly in response to rainfall and runoff. Summer water levels may be lower than the level of Area 8 in late summer. The level of Area 8 will be such that the deepest part will be 18 inches below the high water level of the pond, which is similar to the depth of the pond. It will slope gradually to the high water level, at which point the surrounding berm or road will act as a dam. It is anticipated that plantings will tolerate fluctuations within this range of variation, with emergent species planted lower and shrubs planted higher. Over time, the plants will expand or contract in response to the hydrology that develops. If the hydrology is found to be excessive during monitoring, remedial actions will be taken. The normal pond surface elevation during the wet season is 372.2 ft, while Area 8 is at 371.7 ft. It is possible that surface water from the pond that contains suspended sediments could flow into Area 8 and settle in the wetland creation area. In order to preclude this, a 12 inches high berm will be constructed between the pond and the wetland creation area. Only openings two ft. long each 20 ft will be constructed to maintain hydrology. This berm is designed to prevent silt migration from the pond to Area 8. AREA 4 (7,750 s.f.). This area adjacent to the pond is moist, with red alder, salmonberry and horsetails. In does not require additional moisture to establish wetland hydrology. Red cedar and willows will be planted in slight depressions, with a root collar for each planted indi- vidual, to ensure that wetland conditions occur. Habitat diversity will be increased by these spe- cies. [See planting plan for details]. Because of the presence of alder, any wetland developing here will be a forested wetland. It will, however, be heterogeneous, with local areas dominated by willows. AREA 7 (1,475 s.f.). This site will be creased by placing a flow shield at the low point, near the road, to raise the water table about 6 inches. This will expand the area with wetland hydrology by at least the stated amount. Vine maple (FAC) and osoberry are common on the margins of this wetland. Willows will be planted in the upper margins of this wetland, while lady fern and skunk cabbage will be planted along the boundaries of existing WL-F to augment its diversity. The created area is situated so as to be over 100 ft from lot lines. AREA A (3,525 s.f.). The DEA location should support a seasonal scrub -shrub wetland that will filter pollutants. In order to create adequate hydrology a flow shield will be installed to spread water from draining from WL-E, and wetland plants will be planted in slightly depressed holes. Shallow, horizontal channels will be dug to divert a portion of the flow onto this site. The channels will be lined with compacted clay. Other small depressions will be filled to reduce water loss. The vegetation here consists primarily of facultative species. They will be 4 augmented by willows, salmonberry, and lady fern, species capable of growing under the seasonally wet conditions to be created. AREA 5 (3,000 s.f.). This wetland will occupy the swale leading from WL-E and WL-A. Wetland hydrology will be achieved by minor excavations to spread the water draining from WL-E over a broader area. Plants will be placed into over -excavated pits, with collars surround- ing each plant to retain water. The channel excavations will be lined with clay to reduce infiltration and ensure that water reaches the plantings. This wetland will be created by planting willows, dogwood and salmonberry. AREA 1 (2,700 s.f.). The slope of this area presents a challenge. However, it is a moist habitat, facing north, and receives considerable water through subsurface flows. This would be created by filling to form a bench and to reduce loss of existing vegetation. A water spreader will feed water along the top of this wetland so that it flows into the terrace. The fill material will be underlain a clay liner, and topped with top soil from other clearings in the vicinity. This site would then be planted with salmonberry and red -osier dogwood in depressions. Red cedar would be planted along the base of the berm to augment the current red alder canopy. In the event that adequate hydrology does not occur, water emerging from the biofiltration swale would be diverted and added to the spreader. This plan calls for a mixture of vegetation classes that would more than adequately replace lost values and functions of the wetlands to be replaced. Forested wetland has greater structure and value, while scrub -shrub wetlands can combine structural complexity and greater wildlife value. Created wetlands total 22,825 s.f. The remainder of the required area of mitigation is provided by the credit of 11,806 s.f. for the Pond. Hydrologic Discussion Wetland creation projects require coordination of appropriate plant materials, appropriate hydrology and appropriate soils. Under normal circumstances in this region, soils will develop hydric properties as higher organic content relatively quickly if the appropriate hydrology is maintained. The abilities of plant species to grow under various hydric regimes are relatively well known, though there is some variability in individual responses and genetic potential. Wetland hydrology is usually the most difficult parameter to predict, and is less readily manipu- lated. On the other hand, it is relatively easy to fine-tune the hydrology of a project in several ways. For example, outflow levels can be adjusted up or down by adjusting the level of overflows or drainage culverts. Local hydrology can be enhanced by raising the level of berms, installing small berms, or planting material in local (dug) depressions. In order to improve wetland hydrology, soils of the wetland creation areas will also be amended with organic matter. The top three to six inches of the creation areas will be amended to include at least 25% volume of compost. This section describes the hydrological conditions of each wetland area discussed above. Data are not sufficient to engage in predictive modeling for this scale. The discussion is based on field observations, existing status of the creation site based on existing vegetation, and 5 10/24/95 11:18 FAX 206 685 1728 Uw DEPT BOTANY 191002/006 observed water flow patterns. This; project will be monitored for hive years. One aspect of monitoring will be to determine if appropriate hydrology is being maintained. Con ingencies will be described to be implemented in the event the predicted hydrology fails to develop_ AREA 8 (4,375 s.f). This site is inut ediately north of the pond, and is dominated by weeds. It is a sunny habitat that will support species adapted to growing in marshes and wet meadows. Excavation will create hydric connection to the pond. Pond levels fluctuate slowly, and are lowest in late summer. There is little erosive force. A berm across the opening will be maintained at 12 inches above the normal water level of the pond with several openings. This will minim a sedimentation from the pond. If monitoring shows that water is lost from Area 8, it can be augneatcd by redirecting inflows to the wetland. AREA 4 (7,750 s.f ). All who have inspected this site agree that it is on the brink of wet- land status. It occurs on a moist north -facing slope adjacent to the pond and to WL-D. It receives water from sheet flow down the slope and from WL-D. It is dominated by red alder, salmonberry, and common horsetail, all of which are facultative species. 'Wetland hydrology can be established for the plantings by installing them 2 inches below grade, with a planting collar to enhance moisture collection. This area is nearly wetland and it is very unlikely that any failure due to inadequate hydrology will result. AxEA 7 (1,475 s.f). A flow shield similar to that of Area A will be installed to increase water levels about 6 inches. This will permit water to spread out over the lower creation area. Existing vegetation is Facultative. This area is adjacent to WL F, and the minor hydrological modification will create the required hydrology. In the unlikely event that it does not, then the entire mitigation area will be excavated to within 12 inches of the ground water and replanted with a sufficient density of wetland plants to create wetland conditions. ,A RF,A A (3,525 s.f.). This site was identified by DEA as a feasible wetland creation site. It receives water intermittently draining from WL-E. It is on a moist, north -facing, relatively gentle, slope. Wetland hydrology will be created by installing a flow shield to increase the retention time of water behind it, by planting in depressed pits, and by shallow, horizontal chan- nels dug from the drainage. The channels will be lined with compacted clay, and backfrlled with the surface material. The current vegetation dominated by red alder and salmonberry will easily survive this hydrological enhancement. New plants will be. placed in depressed planting holes with collars. If wetland hydrology fails to develop, the flow shield will be increased in height. AREA 5 (3,000 s..f.). Hydrology for this area will be enhanced by the flow shield described for Area A, but the primary modification will be the excavation of small, shallow channels to divert water from the channel that drains WL E. The excavations will be lined with clay to reduce infiltration and ensure that water reaches the plantings. The current vegetation is dominated by facultative species (red alder, salmonberry) common in wetlands. New plantings will be interspersed with existing vegetation, planted in depressed holes with collars. If hydrology fails, the primary contingency measure is to redirect collected storm drain water from. Military Road to this area. This water would be pre-treated to remove oil, and sent through a biofiltn on swale prior to discharge into Area 5. 51 AREA 1 (2,700 s.£). This area occupies a north facing slope. A 10 ft wide terrace will be created by filling along a 300 ft wide front to form a level area. The fill material will be underlain a clay liner, and topped with top soil from other clearings in the vicinity. Hydrology will be aug- mented by collecting water from the biofiltration swale and detention pond, and releasing it along from a perforated pipe located along the top of this wetland. This site would be planted with salmonberry and red -osier dogwood in depressions. This will result in generally increased site productivity. The existing vegetation is dominated by red alder, osoberry, and Himalayan blackberry. The latter will be removed. Jaeger Engineering has prepared an estimate of Six Month peak flows that will support the wetland creation areas. The projected peak flows for various storm events was calculated using the SBUH hydrograph method as adopted by the City of Federal Way. The drainage flow that provides the main hydrologic source for creation area 5 and DEA is the same as which supports WL-E. This source is the direct discharge from the concrete culvert under Military Road. The 2-year peak flow was determined to be 5.66 CFS. The volume of the 6 month storm is taken to be 64% of the 2-year storm, according to the State DOE manual. Jaeger calculates that the 6 month peak drainage flow is 3.62 CFS in this drainage. Wetland Creation Area 1 will receive discharge from the detention pond and biofiltration swale. The flow control weir catch basins in the existing pond will split the pond inflow to allow the proportionate share of runoff to travel through the pond. Jaeger Engineering predicts that peak drainage flows through the pond and into Area 1 will be the same as for the developed project flows. The 2 year peak flow was 8.68 CFS, and the 6 month peak, at 64% is therefore 5.56 CFS. Buffer Enhancement In addition to the wetland creation, the following is an integral part of the plan: BUFFER ENHANCEMENT. Storm drains will impact the wetland buffers in several locations. The DEA plan calls for numerous replacement species, but several are inappropriate for the growing conditions of this site. Buffer vegetation is important to protect wetlands from human activities, pollution, intrusion and to provide additional habitat. In order to restore this vegetation the following five sections are recognized. Table 3 summarizes buffer restoration requirements. In each section, which is assumed to be 30 ft wide, the central 10 ft will be hydroseeded (or broadcast seeded with a mixture of grasses). No woody plant will be installed within 5 ft of the storm drain. Woody plants will be planted on either side to restore any damage done during installation. Numbering is historical. Buffer area V is no longer needed since drainage plans have been altered. BUFFER I. Along Military Road (2,610 s.f.) A single row of Douglas fir will be planted near the property line. Red cedars will be spaced between the firs and set back. These two spe- cies will provide an evergreen screen. Snowberry, a rapidly growing plant that grows well under these conditions, will augment the trees. 7 TABLE 3. Summary of buffer and wetland enhancements: approximate area and species. Restoration Area Area (s.f) Main Species Buffer I, along Military Road 2,610 red cedar, Douglas fir, snowberry Buffer II, near WL-A. 2,500 red cedar, red elderberry, snowberry, sword fern Buffer III, through WI,-D 12,000 hemlock, osoberry, snowberry, sword fern Buffer IV, to off -site WL B 6,750 hemlock, osoberry, snowberry, sword fern Total Buffer Restoration 23,860 s.f. Wetland Enhancement (WL-D) 870 willows, red cedar, red -osier dogwood Total Buffer Restoration & Wetland Enhancement: 24,730 s.f. BUFFER II (2,500 s.f.). This buffer restoration is needed due to the construction of a portion of the drainage system. The central excavated area will be planted with the seed mix specific below. The central 10 ft will not be planted with woody species to provide for maintenance. It is expected that red alder, etc., will recolonize naturally. Red cedars, snowberry, red elderberry, osoberry, and sword ferns will be as shown on the planting plan. This results in a total of 47 plants. BUFFER III is the largest enhancement (12,000 s.f.). This portion of the storm drain extends for 400 ft. It will be planted with western hemlock in the overstory, along with snow - berry, osoberry, red elderberry, and sword fern. A few vine maples in wetter spots will be planted. BUFFER IV (6,750 s.f.) will be planted similarly to Buffer III. WETLAND ENHANCEMENT (WL-D). The DEA plan called for enhancement of 0.02 acre (870 s.f.) of wetland D. This will be accomplished in a disturbed portion of this wetland. Here, fast growing willows, red cedar and red -osier dogwood will be planted. No herbs are needed since they already occur. MITIGATION GOALS The mitigation described here will compensate for wetland losses resulting from filling Wetlands A & L, potential impacts to WL-E due to widening of Military Road South, and impacts in buffers and WI,-D due to storm drain construction. The existing 0.8 acre pond is now treated as a wetland mitigation area, with a credit of 11,806 s.f. towards the required mitigation total of 34, 631 s.f. The general goals of this mitigation plan are to create wetlands to replace the unavoidable filling of isolated wetlands and damage to existing wetlands. Wetland functions will be at least 8 as great as replaced wetlands and will cover larger areas. Wetlands will be accessible to the public via access roads and on foot. EXISTING CONDITIONS Soils, hydrology, vegetation and wildlife are described in the David Evans report (1992). Based on this report and my investigations, the following evaluations are summarized. Functions and Values of Existing Wetlands Wetland functions include, but are not limited to: water quality (e.g., sediment and pollu- tion) maintenance, achieved through biofiltration and detention; flood control, achieved by re- taining water and permitting infiltration rather than runoff; ground water recharge; surface water supply, achieved by helping to even the flow of water through the seasons; wildlife habitat, due to the high biotic production and variety of habitats; recreation; open space and education. Wetland A is an isolated depressional wetland that lacks open water and is not connected to any stream. Biofiltration functions are minimal since water entering this wetland is of good quality. It has no detention/retention function. It has moderate wildlife value, is of low produc- tivity, and does not serve any recreational or educational functions at present. WL-L is similar to WL-A, though somewhat larger. Wetlands C, D, E. and F are connected via surface flows to the Pond and then to WL J, which is off -site (DEA, 1992). They have moderate diversity and are dominated by red alder and salmonberry. Overall, their functions are moderate to low. Their ability to improve water quality (biofiltration) is moderate to low. Their flood detention and storage potential are low. Their ability to enhance groundwater is moderate. Their biological support (habitat) functions are low. Impact to Wetlands & Buffer The following long-term impacts have been identified: WL A will be filled and incorpo- rated into the plat. WL L will also be filled, with this area remaining in open space, according to information available at this time. The development may increase noise and light levels in the remaining wetlands, though the wetlands are at a lower elevation and concentrated in the northern portion of the project. Increased impervious surfaces can include higher peaks and lower summer base flows and increased water contamination. The drainage plan, including detention ponds and biofiltration swales, will mitigate these potential impacts. This plan concerns itself with direct impacts due to the loss of WL-A and with the results of impacts to other wetlands and buffers from the storm drainage system. 6 10/24/95 11:20 FAX 206 685 1728 Uw DEPT BOTANY fib003/006 MITIGATION PLAN This plan includes all elements of a final mitigation plan as stated in the MDNS. Topog- raphy and locations of drainage features, buffers and wetland creation sites are shown in plans prepared by Jaeger Engineering_ Weisman & Associates have prepared planting plans to show planting details, locations of plants, and typical sections. Del Moral & Associates bas prepared information that appears on the planting plans, determined planting densities and species, and developed the planting spacing. Location of Restoration Areas The Jaeger site plan and the Planting plan (Weisman & Associates) show locations of each mitigation area. Table 2 and Table 3 summarize the size and nature of the mitigation. Site Topography Before & After Construction AREA 8. The site of this area is currently level. The area immediately north of the pond will be excavated as shown on the Weisman plan to create the habitat for 2000 s.f of emergent wetland and 2500 s.•f. of scrub -shrub wetland. The depth at its deepest will be 371.5 ft, 18 inches lower than the top of the pond at high water. It will grade gently to a berm. at 374 ft AREA 4. No grading will be required for this site. AREA 7. Topography of this area will not be changed significantly. AREA A. This will be formed by a flow shield that will raise the water table. No general excavation will be required. Planting holes will be slightly below grade to ensure wetland hydrology. AREA S. Minor, shallow, meandering swales will be excavated to divert some water from the drainage so as to spread it over this area. AREA 1. The existing slope will W altered by cutting and filling to create a 10 ft wide terrace. Mr. Jaeger will be present during the grading and construction of meandering swales to direct specific location and depth for optimal hydraulic distribution. This supervision shall be in Area. 5, possibly Area 7, and wherever else such excavations are required. Hydrological Patterns The drainage plan has been prepared by James Jaeger Engineering. A portion of this plan is integral to the wetland creation plan, as should be obvious from the previous descriptions. The drainage plan shows the location of constructed drainage features that will support created wet- lands as well as water movement within created wetlands. Each wetland creation area is supported by an existing wetland or by the pond. In most cases, the creation area is immediately adjacent to, or below a seasonal water source. Individual areas were discussed in the conceptual section of this report. However, soils may be too pervious 10 to support all wetlands without soil amendments, as described above. Details of hydrology are shown on the Planting plan. Off -site areas feed a culvert under Military Road and provides the hydrology for WL-E, wetland creation area 5 and the WEA creation site. Flows from the developed project will be routed through the detention pond and the biofiltration swale before discharging into the proposed wetland creation area 1. If sufficient hydrology does not develop on Area 4, drainage flows shall be redirected from the adjacent storm drainage. This contingency is very unlikely since this area is very nearly a wetland at present. Restoration Locations Planting areas for this project are shown the Planting Plan. Each site is described here in detail. Table 4 is the Plant Schedule that describes the numbers of each species in each section and their size. Appendix I lists ecological properties of the species. Wetland Creation Sites AREA 8 (4,375 s.f.). This site will be divided into an emergent zone and a scrub -shrub zone. The emergent zone will be planted at a density of 18 plants per 100 s.f., or about a 2.5 ft spacing. Four species will be used, with the expectation that cattails and soft rush will invade naturally. Sixty hardstem bulrushes should be arranged in the center of the area. An additional 60 small -fruited bulrushes should be placed near the berm separating this area from the pond. The outer portions of the emergent zone will be dominated by 150 slough sedges, with 90 Sitka sedges forming an inner ring. Species are planted in masses, as is common in nature. Scrub -shrub vegetation will occupy the shallowest portion of the area, and be planted with shrubs at a density of 5 plants per 100 s.f., or 4.5 ft spacing. These plantings will be augmented by naturally invading red alder and willows. They will be planted in clusters of three individuals. There will be 63 red -osier dogwoods and 63 willows. Willows may be Pacific willow, Sitka willow, or other native facultative wetland willow, depending on availability. AREA 4 (7,750 s.f.). Species will also be filled in within this area. Density of planted ma- terial will be relatively low because there are a substantial number of desirable plants here. Plantings will increase the density to deter intrusions. Ten red cedars, 20 Pacific willows, and 10 Scouler's willows will be planted in the small openings. In addition, the ground layer will be augmented by 21 lady ferns planted in clusters of 3. A total of 61 plants will be introduced, with mean spacing of 11 ft. Existing red alder and the ground cover will result in a dense vegetation. AREA 7 (1,475 s.f.). This small area will be flooded periodically. Along the northern edge of the existing wetland, 20 skunk cabbage will be planted at 3 ft spacing, while at higher levels 20 lady ferns will be planted at 4 ft spacing. The outer margin of this wetland area, 15 Scouler's willow will be planted at 8 ft spacing to blend in with the surrounding forest. There will by 55 plants installed for a mean spacing of 5.2 ft. 11 DEA - AREA A (3,525 s.f.). A total of ten red cedars form the matrix for this site. Plants should be at least 3 ft tall to become established quickly. Fifteen Scouler's willows shall be planted in the upper portion of the created site. An additional 15 Pacific willows should be planted in the lower portion of the site. Plants should be grown in 1 gal. pots. Fifteen salmonberries shall be planted in the higher portions of the created zone. This material should either be larger bare -root plants, or in 1-gal. pots. Finally, twenty lady ferns should be scattered within the matrix of woody plants to provide diversity. One -gal plants are standard for this ap- plication. Though this fern is listed as facultative, it is usually found in forested wetlands, rather than in uplands. There is a total of 75 plants in this section, including an evergreen species, a deciduous tree -shrub, a deciduous shrub and a fern. Proximity to WL-E and the pond provides sources for additional colonists. Planting will be irregular, to fill in among existing vegetation. The average spacing of plants in this area is about 6 ft. AREA 5 (3,000 s.f.). This area will be planted with a mixture of 8 Pacific willow and 8 Piper's willow, at 3 ft intervals along the channel. Eight red twig dogwoods will be spaced in the creation area in depressions. A total of 20 salmonberry will be placed in more open areas and along small channels to fill in the creation area. 24 lady ferns will be planted in depressions in clusters of three. AREA 1 (3,000 s.f.). Interspersed among the existing vegetation will be 10 red -twig dogwoods, 20 salmonberry and 30 lady fern. Wetland Enhancement Site WL-D (870 s.f). The wetland will be enhanced after disturbance by the addition of 5 Pacific willows, 3 red cedars and 3 red -osier dogwoods. The 11 plants will be spaced at about 7 ft spacing to cover the disturbance but be at least 5 ft from the drain line. The permanent impact to this wetland fragment is mitigated elsewhere. A section of WL-D will be traversed by a sewer maintenance road (see note on site plan). In order to minimize impacts to the wetland from heavy equipment, this road shall be constructed using quarry spalls for the crossing. A layer of geotextile filter fabric will be laid down and covered with a 12 inch thick layer of quarry spalls. This is to ensure the continuity of potential hydrologic surface flows through WL-D. Buffer Restoration Sites BUFFER I (2,610 s.f.). This buffer along Military Road requires an evergreen screen and a relatively dense understory. Near the property line, 26 Douglas fir (UPL, Pseudotsuga menziesii) will be planted from 2 gal or larger pots at 10 ft intervals. A staggered row of 26 'red cedars from 2 gal. pots shall be planted 6 to 8 feet inside the property line. Finally, 52 snowberry (FACU, Symphoricarpos albus) shall be planted among the conifers from 1 gal. pots. A total of 104 plants with a mean spacing of 5 ft results. 12 c G M ti ti w 0 0 0 0 0 0 0 0 0 0 0 CIS bA m bU bU bU bA bA bA bfl bA b0 by bA N-- N ,-- -- � -- ' - 1-4 —4 r- M V� O O M O O O O O O O O O O O O) N OM O O O O O O 00 00 O 00 N O O O O O 00 O N O O O O O O O O to O O N CD O O O kn OD N O OD O N O O O O O O CDCDCDO CD O to IC N '~ 0000 r- � N O � � � 00 0 0 C3 bA bU U ti ta o o? o Id o O U 0 ; •, r — M Table 4. Continued. Buffer Areas Total I II III IV Comments Pseudotsuga menziesii 26 26 2 - gal. pots Douglas fir Tsuga heterophylla 69 44 25 1 - gal. pots Western hemlock Thuja plicata 34 26 8 2 - gal. pots Red Cedar Oemleria cerasiformis 20 12 8 1 - gal. pots Osoberry Sambucus racemosa 25 5 12 8 1 - gal. pots Red elderberry Symphoricarpos albus 165 52 17 60 36 1 - gal. pots Snowberry Polystichum munitum 155 17 88 50 1 - gal. pots Sword fern TOTALS 494 104 47 216 127 14 BUFFER II (2,500 s.f.). The central excavated area will be planted with the seed mix specific below. The central 10 ft will not be planted with woody species to provide for maintenance. It is expected that red alder, etc., will recolonize naturally. Eight red cedars planted in two staggered rows as shown on the planting plan. Each row is 10 ft from the centerline. Shrubs, including 17 snowberry, and 5 red elderberry, will be planted in two rows, each 7 ft from the center line as shown. All shrubs shall be from 1 gal. pots. Finally, 17 sword ferns will be planted in two rows as shown, each row 5 ft from the centerline. This results in a total of 47 plants. BUFFER III (12,000 s.f.). Except that western hemlock (UPL, Tsuga heterophylla) replaces red cedar, the planting design is the same as in Buffer II. There will be 44 western hemlock, 60 snowberry, 12 red elderberry, 12 osoberry, and 88 sword fern, for a total of 216 plants. All plants are in 1 gal. pots. BUFFER IV (6,750 s.f.). The planting design is the same as for Buffer III. There will be 25 western hemlock, 36 snowberry, 8 red elderberry, 8 osoberry, and 50 sword fern, for a total of 127 plants. Sowing Mixes A hydroseed mixture was proposed for buffers and where the soil will be disturbed for construction. There are no non-invasive native legumes that can successfully be used in this situation. Red clover was substituted for white clover (as suggested by the City). The central portion of buffers that will be disturbed by construction of the storm drain should be broadcast seeded or hydroseeded with 60% red fescue (Festuca rubra); 30% creeping bent grass (Agrostis stolonifera var. alba), and 10% red clover (Trifolium pratense) or a native legume specified by the city. Biofiltration Swales and other biofiltration features The plan calls for a 200 linear ft biofiltration swale. This portion of the project is not within the scope of the wetland mitigation plan. However, the swale bottom should be planted with a turf and oversown with grass seed to provide maximum biofiltration and sediment control. I recommend a sod composed of a rye -fescue mix (3 ft wide), and overseeded with a mix to include 30% creeping bentgrass (Agrostis alba palustris) or red top (Agrostis alba alba); 30% creeping red fescue (Festuca rubra), 30% meadow foxtail (Alopecurus pratensis) or 30% spike bentgrass (Agrostis exarata) and 10% white or Alsike clover (Trifolium repens). Planting Notes During all phases of the project, construction procedures and techniques will be moni- tored to insure that adequate precautions are taken to protect the created and enhanced wetland and buffer areas. A certified ecologist will visit the site regularly during construction of the project to observe creation activities as they are being completed. Upon completion of the wet- land construction and establishment of vegetation, a baseline (as -built) monitoring report that documents wetland construction activities and any deviations from the mitigation plan will be 15 provided to the City. The ecologist will observe and document the following implementation criteria: All plants, planting and seeding activities shall conform to normal landscape industry standards. All plant material to be used will be native to the Pacific Northwest. All plants shall be containerized or balled and burlapped. Only sound, healthy, vigorous plants, free of defects, diseases, and infestations shall be provided. The Landscape Architect or Wetland Biologist will review plant material to verify con- formance to the plant schedules and to plant characteristics and reserves the right to require replacement of plants that are deemed unsuitable. During any grading of the wetland mitigation area, all existing vegetation beyond the scope of work will be protected. Planting shall occur between October and March. If planting occurs in late spring or summer, irrigation may be required. Dig, pack, transport, and handle all plants with care to ensure protection from injury. Store plants in the manner necessary to accommodate their horticultural requirements. Heel -in plants if necessary to keep them from drying out. Keep wetland plants saturated and shaded until the actual time of installation. Do not let them sit in the sun or dry out during planting. After planting, immediately saturate the wetland and irrigate the buffers to avoid drought stress. Excavate circular plant pits with vertical sides and install vertically. Backfill with speci- fied planting soil and incorporate granular polymer pellets into buffer plantings, as per manufac- turer's specifications to provide additional moisture retention during the dry season. Trees and shrubs planted on more than 6% slopes should have a soil collar of at least 18" diameter to collect water and reduce erosion. Install transplant -type fertilizer to all plant pits as specified. Plant the vegetation as specified on detail drawings. Fertilizer for tree and shrub species is to be in a 21 gram tablet and contain 20% nitrogen, 10% phosphoric acid and 5% potash, and be applied at manufacturer's recommended rates. However, note that no plant within 25 ft of a wetland should be fertilized. Add composted or other biosolid / organic soil to the surface of all wetland creation areas to a depth of at least 3 inches, such that it constitutes from 25 to 30 percent of the total volume. Stake any trees taller than 4 ft in height as shown on the details. Contractor shall warrant all plant material to remain alive and healthy for a period of one year after completion and final acceptance of planting. The Contractor shall replace all dead or unhealthy plants per plans and specifications as directed. 16 The -eland bioloxist Nhail direct the Conn -actor to prboe.:l; locaee irr,tallr,d plants within ate wetlancs and butter. This routine mquiremcrtt allows for fine adjusrme nti: to be made in the field. The Biologist can make modificatiom based on unusua,t conditions. Maintenance Plan C:realion & Buffer Sizes A major goal of this mitigation plan is to pmvidc for sjfTicicnt rnauttertancr that the installed plant materials will be self-sustaining without supplcmentai irrigation alder two years. Upon installation, the mainteaancc; of mitigation areas will include visits as needed to weed- provide suppic:nc:ital watering, and other actions required to maintain planted areas in a healthy condition. Weeding is to be performed around each woody plant within an 13 inch. radius. all woody exouc sgger.=' such as blackbcrrics, shall bs. mravved. No spraying of herbi- ddes or application or fGrriliz= is to occur within the mitigation atria or its buffer. The mainte- nance period shall be for a period of three years from the date of completion of planting, Herbs in the buffer should be left intact, except for tarry rsgmort (Senecic jacobaca), which is a noxious weed and must be controlled. Hand pulling of the firsr year tnsertes or second year shoots is e5acrivc if done before seed set. During the first summer. it is possible that irrigation may be required to help trees and shrubs establish. T'rerea5m a successful project will have no rre�d for irrigation. The detailed plashing plat: calls For using slow -release fL—n4lizer in the planting Mule of buyer plants, providad that Lhcy are at least 25 ft from the wetiancl. if shrubs Show signs of nu- trient deficiency, then slow -release fertilizzrs will be rewired. No spraying of her icidcs or application of fertilizers (other than S=ular. slow -release. placed irn mediatcly next to the shrtibs) is to occur within the mitigation area or its buffer, The trainman= period shall be for three years Vic= the date of completion of pianting. This shall include remclying any trash from the ]ulYer and wcrland. Pond Maintenance, Pond maintenance will consist of sediment monitoring and. control. The principal raaintcrtarno item is to monitor the sediment acc-.tmuiation at four lecstaons• within the type Jr catch basin at the SW end of the pond (inlet CS); within CS -rr;? immediately upstream of the inlet CB, within the pond adja=,,1t to the inlet CB, and within the pored adjacent to the outlet C$ with the weir overflow to the detwiot: pond. Sediment depth shall be moasured using a graduated wooden rod marked with 0.1 ft increments Tile recast of the staff shall be a broad pad to arti xu=e its penetration into sediments. At each location. the bascp6nt to rncawrc sediment height will be the top of the catch basin. The initial dcptft From, bastpoint to the lxrtom shall be retarded on monitoring record charts. The length of the staff oclo« die bascpoinr, while resting on the sedimcat TOP (pond bottom), will record the depth of Sediment accttmuladon when compared to the initial depth figure. if the: sediment build-up in the catch basin approaches 18 in.. or ram. hes the pipe inverts, then the sunlp should be purnved using a dewarering pump or septic tank puutuper. If the sediment accurntalation in the frond exceeds 24 in., the sediment will be removed using an excavator. Camb basin rnspecftons should be performed quarterly, except monthly between November through March during the first two years when construction is occurring. The interval can be adjusted based on the pumping frequency. Pond sediment inspections shall also be performed quarterly. and at any tir;u the pond water level drops below its mid -level A record of all wafer tevel monitoring, catcb basi2 sediment inspections and pond sediment inspections shall be kept. Any maintc-.=ce actions shall be noted. A copy of all inspection and activity records shall be sent to the City Department of Public Works nt the end of each year 17 If dredging of the pond bottom is required, the City Department of Public Works shall be notified in writing at least 7 days prior to the work. Maintenance of the pond will also include a review of the aquatic and eraerg=t plant growth. Plants shall be kept to a level that will not result in more frequent pond maintenance, or reduce the capacity of the pond. Excessive plant growth shall not impede the inlet or outlet pipes or significantly obscure the water level around the measurme- ponts. Five year maintenance costs for the pond are estimated to be $2875, as detailed below. Mitigation Plan Schedule All required wetland mitigation improvements, except monitoring, shall be completed and accepted by the Director of Community Development prior to beginning activities that w411 diswrb regulated wetlands. Other aspects of site preparation that will not impact these wetlands may commeriee according to the controlling regulations. A Temporary irrigation system may be required since water for soine of the wetlands depends on the storm drain system. There will be two phases to the project. Phase 1 is wetland creation: Phasc 11 is buffer restoration. Phase II cannot proceed until the storm drain system has been installed, at least in the wetland buffers. Prior to each phase a mecring among the contractors, client and biologist should be held to coordinate the process. The folIowing sequence is advisory. Phase 1 1. Order plant material: check for substitutions if availability is limited. 2. Remove any debris from the site. 3. Locate, flag and, if nocessary, fence clearing limits and the extent Of the buffer. 4. Install filter fabric fences as appropriate, according to the King County Surface Water Design Manual specifications. A detailed crosioalsediment control plan f-�r the project will be prepared by Jaeger Engineering. 5. Perform necessary grading in the wetlands. 6. Arrange for delivery and installation date for wetland plants. 7. Install temporary irrigation for wetlands that may require irrigation, or connect to drain system. 8..Locate and mark the position of wetland plants in the project area. 9, Stockpile vegetation carefully to avoid stress or damage. 10. Plant wetland plants. 11. Perform initial monitoring and prepare as -built report for wetland-, immediately after planting. Phase 11 12. When drain lines installation is scheduled, order plants and arrange for delivery 13. Auer installation of storm drains, hydrosecd disturbed arcas. 14. Mark position of plants to be planted in buffer restoration. 18 15. Receive and stockpile plants. Any deviations from plant schedule must be approved by the City of Federal Way. 16. Plant buffer plants. 17. Perform initial monitoring and prepare as -built report for buffer enhancement immediately after planting. PERFORMANCE STANDARDS The project will be considered successful if the following standards are met: 1. After five years, the vegetation should be self-sustaining and cover 80% of the area planted during construction. 2. The minimum overall survival rate for trees, shrubs, and herbs is 80% of the planted individuals. During the first year, the contractor shall replace dead plants. The average woody plant should be at least 50% taller after five years. 3. After five years, ferns shall cover 50% greater area than when planted and have those 50% more fronds than when planted. They shall be well established. 4. After five years, planted vegetation shall show no widespread signs of abnormal growth. 5. Wetlands shall be established on an area of 22,825 s.f. outside delineated wetland boundaries. If the project fails to meet performance standards, the monitoring program could be reviewed and extended and contingency plans may be implemented. The cause of failure to meet these standards shall be evaluated and appropriate actions taken. Such actions include, but are not limited to: replacement of dead individuals, irrigation, alteration of hydrology, and changing the species composition. If after any monitoring period, mortality exceeds the accepted standard or if mortality is spatially concentrated, then recommendations for replacements will be made. (See the following contingency plan section.) MONITORING PLAN The purpose of the monitoring program is to document the degree of success or failure attained in achieving the performance standards and to identify remedial actions. A five-year monitoring program will be implemented to assess the completed wetland mitigation project. Upon completion of wetland construction and again after buffer installations, baseline monitoring reports (the "as -built" report) documenting construction activities and any deviations from the approved mitigation plan will be provided to the City within 45 days of installation. Subsequent monitoring shall occur early in the first growing season, at the end of the first growing season, twice in year 2 and at the end of years 3, 4, and 5. A total of nine monitoring events, including the two as-builts reports, shall occur. 19 Permanent mtangular sample plots (25 by 50 ft) will be. established and marked with rebar in each corner for repeat -measure sampling of survival and growth. Plots will be estab- lishcd as follows: BEA-A, I plot; Area 1, 1 plot; Area 4, 2 plots, Areas 5. and 7, 1 plot each, and Area 8, 2 ploys, for a total of 3 perrnanctnt wetland plots. The emergent and submerged vegetation of the pond cage will be sampled ,.fsing three belt transeets each 3 ft wide. Each transect will be markcd with rebar on bath sides of the pond, and the transect will start at the edge and terminate where the water depth is 2 ft. Transacts will be measured from both sides. Vegetation cover and species composition will be determined in a contiguous belt of 3 ft by 3 ft sample plots. This method is used 10 minimize the impacts of sampling. Samtplc plots also will be established in the buffers along the storm drtin corridors. There will be one 30 by 50 A plot each 150 linear fL with the long axis a[isned along the corri- dor. Buti`er I will have 2 plots, Buffer II, 1 plot, Suffer 111, 3 plots, and Buffer IV, 2 plots, for a total of 8 buffer plots. All plants in the wetland enhanccment area will be observed directly. All planted woody individuals and ferns in the project will be tagged with their species identity and sequence number for easy and certain identification. All plants will be scored at each monitoring time as healthy, stressed, or dead. The height and spread of all plants in the permanent plots will be recorded as will the number of fern fronds. Any plant exceeding the height performance su mdard will sot be meas- ured subscquently, paired t�tests will be used to determine the significance of growth increments, Photo -points shall be established from a fixed point at each permanent plot and each transect to collect a sequence of photos to evaluate vegetation over time. Photos will be included with each monitoring report. Invasion of noxious weeds will be noted. These species could include reed canarygrass, Purple loose strife, Himalayan blackberry, and tansy ragwort, but not cattails, slender rush, com- mon horsetai Is, Watson, s willow herb, or hardback. Water levels and soil saturation will be monitored directly at each permatleni plot. if the plats arc too dry, or if flooding is too deep, these facts will be noted and recommendations to alleviate the conditions will be made. To accomplish hydrologic monitoring, scaled wooded stakes shall be installed at each plot where inundation is e.xpectcd. Water levels will be judged against the stakes. Soils of sites lacking inundation will be probed at each sample time ro determine the depth of saturation.. Soil moisture wilt be determined gmv imetrically in each plot, and iti adjacent uplands. Samples will -be taken during normal monitoring.. and, in addition, in May, August and October of each year. Soil moisture data will be prtesentcd graphically against seasonal precipitation data. (Sce also Pond Maintenance section.) 20 10/24/95 11:21 FAX 208 685 1728 UW DEPT BOTANY 1M005/006 The City has requested that wildlife and amphibians also be monitored in the pond. It is not clear what purpose monitoring will achieve here, since there are no performance standards requested or suggested, and there are no actions being taken. No formal quantitative Monitoring is proposed. At earl, monitoring period, however, all species of wildlife (primarily birds) that observed or heard will be noted. Signs of ampbibians, such as egg masses, Vocalizations, or direct observation of tadpoles or adults, will also be recorded. Sample egg masses will be collected and identified by an expert. The water level of the pond will be monitored quarterly using a water level staff located near the west end of the pond near the flow control weir and a crest gauge on the weir itself Water levels will be recorded during each visit. Sedimentation will also be monitored by checking the sump in the Type Il catch basin at the pond inlet pipe, as described above. Sedimentation will also be monitored at the flow control weir catch basin using a graduated pole. Recommendations for any flusher necessary maintenance shall be made in monitoring re- ports, based on symptoms of stress observed in the field. The results of each monitoring session will be reported, along with recommendations for maintenance or remedial action, to the Client and the City. These reports will provide the mean height of each species, mean height increment, and number and percentage of individuals that have met the standard. Each report will summarize the project's status and will call for any spe- cific remedial actions. Such actions include, but may not be limited to: fertilizing specific species; reducing the competition from herbaceous species, replacing dead or senescent individuals; and specification of different species for replacement. If, during the course of monitoring, major problems are revealed, then remedial actions will be recommended. Should the restoration plan not meet its goals after five years, the monitoring period may be extended until such goals are achieved. The mitigated wetlands shall be observed for excessive erosion, scour, and sedimentation that may adversely affect the health and/or diversity of the overall wetland mitigation area. CONTINGENCIES Wetland creation projects may fail due to inadequate hydrology, inappropriate soils, in- vasion by weeds, competition from existing species, lack of soil fertility, or a variety of other factors. Generally, only invasions, competition and fertility problems threaten restoration pro- jects, though poor plant material may create problems. The principal reason that any wetland creation project fails is the lack of suitable hydrol- ogy. If conditions become too dry, them either surface hydrology would have to be altered or supplemental irrigation would be required. It is possible that specified plant materials will not be available in sufficient numbers at the time required. The wetland biologist way suggest appropriate substitutions of native mate- rials, but all plant materials substitu ions must be approved by the City of Federal Way prior to on -site delivery. Replacement species must have similar moisture requirements and fulfills the same general functional and structural role. 21 10/24/95 11:22 FAX. 206 685 1728 UW DEPT BOTANY Igloos/o06 The landscape contractor must monitor the health of all newly introduced plant material quarterly for one year after the date of planting. Dead plants should be replaced as necessary during the appropriate season. Nutrient depravation would be alleviated by suitable fertilizing as discussed under main- tenance. If weeds become too dense, they should be controlled manually and described under maintcnance. Unchecked, weeds will reduce survival and growth rates of young plants. If plants die, they will be replaced by suitable individuals. If the mortality is sporadic, it is likely that the same species will be recommended. If it is general, then ahercative species or habitat alteration will be required. If damage occurs due to erosion, settling or other physical factors, this damage shall be repaired and the cause rectified. If plants are growing poorly, or show deficiency symptoms during monitoring, additional slow release fertiliser should be added as needed. If sufficient hydrology fails to develop in any area, theta drainage flows will be redirected from the nearest available source as appropriate. Note that water will not be diverted from Wetland F. Trickle irrigation may be installed. If sufficient hydrology fails to develop in Area 4, additional hydrologic support could be provided from the adjacent storm drainage at catch basin 43. This basin would be tapped using a 4 inch PVC feeder pipe. The flow into this pipe would be made proportional using an elbowed orifice at the catch basin. This would also provide for oillwater separation. The feeder pipe will be perforated and placed level along the upper (eastern) edge of Area 4. It would be placed at ground level and covered with gravel. If wetland creation Areas 5 and DEA-A require still more hydrologic support, the storm drainage system within ,Military Road can be tapped at the curb catch basin just south of buffer area I (CB #44). This flow will be partially diverted into a vegetated swale that will be constructed along the west edge of buffer enhancement area I and discharged into Area 5. If the project requires significant plant replacement, or if it fails to meet the performance criteria, then additional monitoring may be required by the City. If the project fails to meet these goals, a complete re -design may be required. DONVING REQUIREMENTS Costs of plant material may vary considerably depending on quantities, qualities and sizes. The costs for plant material have recently been quoted to me and are uscd to help deter- mine a required bond amount. The City will provide forms for bonding calculations. The following is advisory. 22 Plant Materials Table 4 summarizes the total numbers of plants required. Their estimated costs are: 94 Lady fern @ $2.50 per 1-gal. pot = $235; 20 Skunk cabbage @ $3.00 per 1 -gal. pot = $60; 120 Bulrushes @ $2.00 per 1-gal. pot = $240; 240 Sedges @ $2.50 per 1-gal. pot = $600; 155 Sword fern @ $2.50 per 1-gal. pot = $ 387; 20 Osoberry @ $3.50 per 1-gal. pot = $ 70; 84 Red -osier dogwood @ $4.00 per I -gal pot = $336 ; 25 Red elderberry @ $3.50 per pot= $ 87; 76 Salmonberry @ $4.00 per I gal. pot = $304; 165 Snowberry (@ 3.00 per 1-gal. pot = $ 495; 159 Willows @ $3.50 per 1-gal. pot = $ 557; 26 Douglas fir @ $4.00 per 2-gal. pot = $ 104; 57 Red cedar @ $6.00 per 2-gal. pot = $342; 69 Western hemlock @ $3.00 per 1-gal pot = 207. Total estimated plant cost is $ 4024. Installation Costs Labor for installation estimated at 16 person -days @ $240 per day, $3840. Costs of materials estimated at $.60 per plant or $1150. Contingency costs, $400. Total installation cost exclusive of plant materials is $ 5400. Costs for clearing, grading and excavation are estimated at $3000. Vegetation maintenance costs are estimated as follows: 10 person -days per year @ $120 per day, $1200 per year, for three years, or a total of $3600. Pond maintenance costs: Annual costs--5 inspection visits @ $75 each, = $375; 1 catch basin pumping @ $200 = $575 per year. Total for five years = $2875. Monitoring & Supervision Costs Installation supervision for planting locations is required. Supervision costs, by del Moral & Associates are estimated at $1200. The as -built monitoring, which includes two phases and establishing the permanent plots, is estimated at $1600. Seven subsequent monitoring events over five years, as described above, $700 each, for a total of $4900. Total five year monitoring and supervision costs years are estimated to be $7700. Total estimate for plant costs, installation, maintenance, monitoring and supervision is $26591. The City requires a bond 120% of estimated installation cost. This amount is $31,909. 23 SUMMARY In order to compensate for unavoidable impacts to wetlands and buffers resulting from the development of Heritage Woods, a series of mitigation actions is required. Two small wetlands, totaling 0.36 acre, will be replaced. Minor alterations to two additional wetlands total 0.03 acre. Buffers totaling 0.3 acre will be impacted. These wetlands will be replaced by 22,825 s.f of created wetlands that form a mixture of classes. The pond is used to replace any additional lost functions or values, and provides a mitigation credit of 11,806 s.£. This plan describes the existing wetlands, describes mitigation goals, and describes the wetlands to be created. In addition, the buffer restoration is described. The mitigation plan shows the location of restoration areas. The wetlands will include a total of 816 plants, while the buffers will be restored using 489 plants. Planting notes, a schedule for construction of the wetlands, a maintenance plan, a moni- toring plan and an outline for contingencies are all provided. Monitoring is to occur over a five year period. The estimated cost for this project including the 120% increase factor, is $31,909. LITERATURE CITED David Evans & Associates. 1992. Wetland determination, impact assessment, and conceptual mitigation for the Heritage Woods Property, Federal Way, Washington (Revised). Report to Parklane Ventures, Inc. Franklin, J. F., & C. T. Dymess. 1973. Natural Vegetation of Oregon and Washington. University of Oregon Press, Corvallis. Klinka, K., V. J. Krajina, A. Ceska, & A. M. Scagel. 1989. Indicator Plants of Coastal British Columbia. University of Vancouver Press, Vancouver. Kruckeberg, A. R. 1982. Gardening with Native Plants of the Pacific Northwest. University of Washington Press, Seattle. U.S. Soil Conservation Service. 1979. Soil Survey of Pierce County. U.S. Govt. Printing Office, Washington, D.C. Vitt, D. H., J. E. Marsh, & Robin B. Bovey. 1988. Mosses, Lichens and Ferns of Northwest North America. Lone Pine Publishing, Edmonton, Alberta. DISCLAIMER The recommendations of this report are based on the best available information about conditions existing and likely to exist on the subject property and about the ecological require- ments of the specified species. The project plans have resulted from collaboration among the drainage engineer, landscape architect and ecologist. However, many aspects of such projects are beyond the control of any biologist. These include the quality of the plant material, the methods used to install the plant material, the actual hydrological conditions that develop as a consequence of filling, grading and excavating, unknown soil conditions and unusual climatic events. In particular, the success of this mitigation plan is vulnerable to off -site hydrological alterations beyond the direct control of anyone associated with the project. The designs and recommendations in this report are provided in good faith. Del Moral & Associates assumes no responsibility or liability for any failures of any plantings in this project. 24 Appendix I Summary of Ecological Characteristics of Species Proposed for Wetland Creation and Buffer Enhancements Information for this Appendix has been gathered from several sources, including: Klinka, et al. (1989), Franklin & Dyrness (1973), Vitt, et al. (1988), and Kruckeberg (1982), in addition to my personal experience. Lady fern (Athyrium filix femina). Facultative plant. Shade tolerant fern growing in moist to wet habitats, but does not stand chronic flooding (plant above normal high-water line). Prefers organic, nitrogen -rich soils and does well with the shrubs listed above. Plant no more than 10 per 100 s.£, well distributed among shrubs. Sword fern (Polystichum munitum). Facultative upland plant. Shade tolerant dominant ground layer species, capable of growing from near wetland edges to relatively dry sites. Skunk cabbage (Lysichiton americanum). Obligate wetland plant. Common in forested wetlands; requires saturation for most of the year, but does not grow well in deeper water. May dominate where overstory has been removed. Sitka sedge (Carex sitchensis). Obligate wetland plant. Grows best in open conditions on very wet soils, particularity in organic soils with stagnant water. Tolerates chronic flooding and is very good in nutrient -rich situations. Plants about 2 ft tall with little horizontal spreading. Planting density 25 per 100 s.f. Slough sedge (Carex obnupta). Obligate wetland plant. Grows well in partial shade or open conditions in standing water or mud, particularly on organic or gley soils; prefers nitrogen -rich condi- tions. Frequently grows with Sitka sedge. Up to al meter tall, not rhizomatous. Planting density 25 per 100 s.f. Small -fruited bulrush (Scirpus microcarpus). Obligate wetland plant. Grows best in shallow marshes and mud and in disturbed, open habitats rich in nitrogen. Relatively tall (up to 6 ft), attractive plant with rapid initial growth. Planting density 20 per 100 s.f. Hardstem bulrush (Scirpus acutus). Obligate wetland plant. Tolerates water up to 3 ft in depth, but can grow on muddy shores. Relatively tall plant that spreads slowly. Planting density 20 per 100 s.f. May be used in place of or in addition to small -fruited bulrush. Red -osier dogwood (Cornus sericea). Facultative wetland plant. Common in open lake and swamp margins, growing in organic soils with high nitrogen. Tolerates shade and fluctuating water table, capable of rapid growth and spread. Can grow to 8 ft, but usually smaller. Use 1 gal. plants at spacing of from 4 to 5 ft. Osoberry (Oemleria cerasiformis). Facultative upland plant. This small to medium-sized shrub grows best in the understory of a deciduous canopy, but can grow well in the open. It usually occurs in moist, nitrogen rich soils, particularly where there is a fluctuating water table. Grows well with snowberry and red elderberry. Scouler's willow (Salix scouleriana). Facultative plant. A smaller shrub able to grow in saturated soils and fluctuating conditions. Scouler's willow can also occur in drier sites. Pacific willow (Salix lucida ssp. lasiandra). Facultative wetland plant. Common shrub to small tree with rapid growth under moist to wet conditions. Plant fascicles at 2 to 3 ft spacing; pot -grown plants at 4 to 5 ft spacing. Piper's willow (Salix piperi). Facultative wetland plant. This species is fast growing and relatively common in the Puget Sound area. Tolerates flooding well and can stand some drought. Sitka willow (Salix sitchensis). Facultative wetland plant. A tall shrub growing well in saturated and flooded soils. Can tolerate some late summer drought. Red elderberry (Sambucus racemosa). Facultative upland plant. This moderate -sized shrub prefers partial shade and does well in moist, nitrogen rich soils. Best to plant close to wetland areas or where water is draining to its location. Grows well with red alder, sword fern and salmonberry. Produces attractive red berries and reproduces well from seed. Snowberry (Symphoricarpos albus). Facultative upland plant. Fast-growing, spreading deciduous low shrub tolerant of dry and open conditions. Grows best in moist soils with higher fertility; tolerant of some ground water fluctuation. Berries are attractive to wildlife. Red cedar (Thuja plicata). Facultative plant. Flood tolerant evergreen tree. Use as a specimen tree in wet to moist areas. Plant at 10 ft or more spacing, with appropriate shrubs. Grows well in buffers and along creeks. Western hemlock (Tsuga heterophylla). Upland plant. Common conifer found in intermediate soil moisture, often adjacent to wetlands. Foliage is attractive. Plant where vegetation is low to the ground, or as larger individuals. Plant at least 10 ft. spacing, or as specimen tree. Douglas fir (Pseudotsuga menziesii). Upland plant. Relatively fast growing conifer capable of achieving dominance in relatively dry sites. Use on well drained soils. Best to plant as larger saplings to minimize competition from existing shrubs and herbs. Golder Associates Inc. 4104 -148th Avenue, N.E. Redmond, WA 98052 Telephone (425) 883-0777 Fax (425) 882-5498 November 17,1997 Parklane Ventures, Inc. 31620 23rd Avenue South Suite #320 Federal Way, Washington 98003 ATTENTION: Mr. David Morrison = Golder Associates Our ref: 973-1122 RCIiCI V r-LJ Or COMMUNITY DEVELOPMENT DFPARTMPNT RE: ANALYSIS AND RESULTS OF SLOPE STABILIZATION WORK TRACT H AND J OF DIVISION 1 PRELIMINARY LOTS 52 THROUGH 58 HERITAGE WOODS FEDERAL WAY, WASHINGTON Dear David: The purpose of this letter is to summarize the slope stabilization work completed at the above referenced site and provide additional analysis of the stabilization measures suitable to meet the City of Federal Way Code section 22-1286(c)(1-4) Geologically Hazardous Areas Development. A summary of the site conditions and proposed slope stabilization measures were presented in a report by Golder to Parklane Ventures dated June 23,1997. Prior to their implementation, the recommendations were reviewed by the City of Federal Way's geotechnical consultant, Giles Engineering. As a result of a meeting with the City to discuss the proposed construction, we agreed to excavate several additional test pits in the roadway area and in the upper portions of the fill embankment. The additional test pits were to be excavated during the construction of the slope repairs and evaluated in light of our previous recommendations. This report contains a description of the slope repair work, the results of the additional investigations, an analysis of the slope stability incorporating the information from the recent explorations, and summary recommendations for additional lot grading. SLOPE REPAIR WORK The slope repair plans were prepared by Jaeger Engineers and titled "Heritage Woods Tract H & J Slope Repair Plan", dated September 16,1997. In general the proposed work included installation of a french drain on the lower portion of the fill embankment slope and placement of fill on lots 53 and 54 to remediate the mud flow areas and re -grade the slopes to a flatter 21i:1V configuration. OFFICES IN AUSTRALIA, CANADA, GERMANY, HUNGARY, ITALY, SWEDEN, UNITED KINGDOM, UNITED STATES November 17,1997 2 973-1122 Construction of the French drain was done during the first week of October,1997 and was observed and documented by a member of Golder's field staff. The french drain construction was completed in accordance with the plans and specifications with the following exceptions: The south end of the drain was terminated at the boundary of lots 54 and 55. Completion of the drain to the south would have required extensive clearing of the native vegetation. It was decided that the clearing required for the drain installation should be done next spring or summer along with the completion of the french drain on lots 54 and 55. In our opinion the French drain installation on those lots is not critical for the stability of the present slope condition but will be necessary prior to the final grading of the site per the grading plans now submitted to the City. • At two locations the French drain installation encountered seepage just upslope of the drain excavation. In both instances, a trench perpendicular and upslope of the French drain was excavated to capture the area of seepage. The upslope spur trench was filled with drain rock and connected to the main French drain. The initial slope regrading work began on October 7,1997 using an imported sand fill. A member of Golder's field staff was on -site to test the fill compaction and monitor the work The contractor stockpiled the sand fill at the toe of the fill slope on Lot 52 and began pushing the fill into the prepared foundation area at the toe of the slope on Lot 53. However, rainy weather set in and the fill became too wet to achieve the specified compaction. Parklane Ventures requested approval to use a quarry rock fill instead of the imported sand fill, so that the work could be completed regardless of the weather. Golder concurred with the use of the quarry rock fill alternate as documented in a letter dated October 9,1997. The quarry rock fill placement was observed by a member of Golder's field staff. The area of the mud flow was benched using a trackhoe and the quarry rock was dumped from the crest of the slope and distributed on the slope by the track hoe. The toe of the 2HAV slope was staked and the contractor filled the slope to the 2HAV limits. In the area adjacent to the mud flow on Lot 54, the 2HAV was achieved by filling the over - steepen toe area with rock The over -steepen area at the toe of the fill on Lot 52 was filled previously with compacted sand for the access ramp for the sand fill placement. We recommend that the repaired slopes remain covered with plastic throughout the winter months since no significant vegetation will grow to provide erosion protection during the rainy weather. In addition, the foundation area at the toe of the slope on lots 52,53 and 54 was also covered with plastic to protect the subgrade and stockpiled fill from further moisture damage prior to next years grading work Golder Associates November 17,1997 3 973-1122 ADDITIONAL INVESTIGATIONS During slope repair work several additional test puts were excavated to confirm the conditions within the fill embankment. Two test pits were excavated in the planter strip between the sidewalk and road (TP-9, TP-10). One in front of Lot 52 and the other in front of Lot 54. Both test pits encountered dense, well compacted fill to a depth of about four feet with no water seepage. The upslope face of the mud flow scarp was well compacted when probed with a steel sail probe. The roadway fill was also observed in an excavation to repair the asphalt pavement in front of Lot 53. Below a localized wet zone in the upper 2 feet (caused by wager following a utility trench pipe bedding) the subgrade was dense when probed with a steel soil probe. Two additional test pits were excavated near the crest of the slope on lots 53 and 54 on either side of the mud flow (TP-7, TP-8). Both of the test pits were excavated into the existing embankment fill and extended to a depth of about seven feet. The fill consisted of a wet, loose, silty sand with little to some gravel. No water seepage was observed. The loose, wet nature of the fill observed in the test pits on the slope has been considered in our analysis of the embankment slope included in the following section. Based on these results, it appears that the fill underlying the roadway was properly placed and well compacted. However, based on the two test pits, the fill on the slopes does not appear to have been well compacted. STABILITY ANALYSIS OF SLOPE REPAIRS In preparing our stability analysis we reviewed the City of Federal Way Code section 22- 1286(c)(1-4) Geologically Hazardous Areas Development. Our analysis along with the civil engineers drawings are intended to address the issues of the code section including slope stability, seismic hazards, landsliding, and groundwater. We have included with this letter report topographic sections of each of the preliminary lots in Tract H and j showing the existing topography, the limits of the fill placed at the crest of the slope for the roadway (based on the grading plan by Jaeger Engineers), and the estimated topography required for future house construction. The fill slopes shown on Lots 52 and 55 through 58 are all currently at 2H:1V slopes or gentler and in our opinion should remain stable through this winter. Lots 53 and 54 contained the highest fill slopes and the thickest fill sections with a maximum at the crest of the slope of about fourteen feet on Lot 54 and about ten feet on Lot 53. The slopes on these lots were repaired by installing the French drain and re -grading with quarry spall fill. To help evaluate the stability of these slopes, we completed a series of slope stability calculations. The purpose of these calculations were to consider the stability over this 1997-1998 winter season. The long term slope stability and foundation conditions for future house construction is discussed in the following section. in completing the stability analyses we assumed the following: Golder Associates November 17,1997 4 973-1122 • Soil Properties: We assumed that the well compacted fills below the roadway would have a C = 36 degrees with a y = 130 pcf. The loose fill below the slope sections were assumed to have a 0' = 28 degrees with a y = 120 pef. The crushed rock was assumed to have a �' = 40 degrees with a y = 130 pcf. The native soils below the fills are dense glacial soils and were assumed to have a 38 degrees with ay = 125 pcf. These values are based on engineering judgment and past experience with similar soils. • Ground Water: The location of the groundwater seepage line has a significant effect on the stability calculations. Based on the results of the explorations and the types of soils encountered, we believe that the seepage line will occur at the contact with the native soils. However, to be conservative, we assumed that the seepage line occurred about half way up into the loose fill layer. • Critical Section: We completed the analysis on the section with the thickest loose fill layer at Lot 54. The results are shown on the attached plot and output file from the computer program XSTABL. The calculated safety factor (FS) was about 1.1 for the conservative seepage line condition. The critical failure circle indicates a shallow failure occurring almost entirely in the embankment fill. We feel that this is a reasonable construction FS value over the winter. We have recommended that the slopes be covered with visqueen over the winter which should reduce erosion, and the risk of sloughing and minimize groundwater infiltration. Thus the maximum seepage line will likely occur below that assumed in the analysis with a higher actual FS. The fill embankment does not represent a liquefaction risk during a seismic event. However, if a significant seismic event occurred prior to the completion of the lot grading there might be some minor slump displacements in the area of the loose fill on the slope. We would not expect the roadway or utilities to be affected. ADDITIONAL LOT GRADING Additional grading is proposed within Tracts H and J, which has been developed as seven single family lots, 52 through 58. We understand that Parklane Ventures has sold these lots to Schneider Homes on the condition that Parklane aquires a grading permit from the City of Federal Way. Golder Associates Inc. has worked with the civil engineer Jaeger Engineers to develop recommendations for the final site grading. As part of our evaluation we completed a geotechnical investigation (report dated June 23,1997), monitored the completion of the slope repairs and re -grading, and completed supplementary investigations of the fill embankment in cooperation with Giles Engineering Associates, Inc. We have reviewed the Jaeger Engineering grading plan submitted to the City and concur with the grading plan shown with the following minor comments. Golder Associates November 17 1997 5 973-1122 • Under Fill Specifications, item (2) it states that the fill source for the grading will be on -site native granular soil. In our opinion, the fill source can also be imported and should be approved by Golder prior to its use. The interceptor drain shown across Lot 55 will need to be augmented with a second drain located a little lower on the slope as shown in our geotechnical report dated June 23,1997, Figure 6. The exact location for that drain will be assessed during clearing and foundation preparation for the lot fill placement based on observations of water seepage. The tightline drain as shown on the plan draining the upper interceptor drain on lot 56 could possibly be moved to Lot 55 so it could be connected to the lower drain. Alternatively it could be left there and a second tightline added on lot 55. The toe of the 2H:1V fill on Lot 57 and 58 will be supported at the eastern lot boundary by a four to six foot high reinforced fill faced with a rockery. The need for such reinforced fill walls had,been discussed previously as an alternative to filling beyond the property lines. We can provide more specific engineering design recommendations for the reinforced fill and rockery facing prior to the start of grading operations. Based on our analysis, the permanent slope configurations for the building lots shown on the attached sections and on the grading plan already submitted to the City will have a FS on the order of 1.5 assuming the recommendations in this letter and the Jaeger Engineering grading letter are followed. The recommendations contained in our June 23,1997 report regarding the likely presence of topsoil below the fill on the slope remain the same. We have recommended a pre -load be placed on the house lots for a period of about two weeks prior to casting building footings. Additionally, the subsequent geotechnical investigations on the slope adjacent to the mud flow and observations from our remediation work indicate that the fill in the area of the failure is very loose to loose and wet. Although house foundation elements will bear in the fill to be placed above the loose fill, there is a risk of foundation settlement in the portions of the foundations overlying the loose fill wedge (see attached sections for lots 53, 54, and 55. Therefore, we recommend that those portions of the future houses underlain by loose fill be supported on pile foundations. Suitable pile types would include augercast or small diameter steel pipe piles. Based on the existing information we would anticipate that portions of the houses on Lots 53, 54, 55 would require piles. The remaining foundations either will have only a small thickness of existing fill at depth, or will be supported on the native soils, or on structural fill to be placed later. Once the house foundation locations are finalized we can provide more detailed pile recommendations. Golder Associates I INovember 17 1997 6 973-1122 We trust this letter meets your needs. If you have any questions, please give us a call. Sincerely, GOLDER % ASSOCIATES INC. dIsYbtsQ- ICJ _ a/171- Robert L. Plum, Principal JGJ/RLP/slt 111718JIAOC EXPIRES Golder Associates FIGURES Golder Associates Y � '�— Storm Sewer Reference: Jaeger Engineering Drawing G-2, Heritage Woods Grading Plan, Dated December, 1994 0 100 FEET EXPLANATION Approximate Limits of Fill Placed on the Slope Groundwater Seeps Test Pit Locations o--- Sewer Pipes — — Manhole 57 Preliminary Lot Numbers �.r r/ F Minor Slumps in Fill Slump/Mud Flow FIGURE 1 SITE PLAN PARKLANEMERITAGE WOODSMA PROJECT NO. 9731122 DRAWING NO. 72304 DATE 11/11/97 DRAWN BY TK Golder Associates SCIALE: I'f=16" LOT 52 20 36 Y6 56, 40 1 to 120 139 NO feet /*629W*W /VPA W3 I Y f4 ;4 IV V F1,11 SCAL-C' )"tJO" m LOT 5-3 3-6 Goo ye I 116 uo ller,46re /PA9Y-LAsj'E/vjA y73 -11.22 LOT 51-I yso 1�IKd flow ScuEx g's Fw'h�tvt G rq �� �azr N�+tib� INI Ia9Q lid i Fre.K.L�: �ru, �00 -- T.....__—,�_��__._._.__�_._ Q /o 20 30 �o So 60 �o 6t g0 � 01 /60 I10 Ito ALE I ��- /4 � ttsr, }�.jel�+�K� /wA 9 3-J)zz c. l l 1 l 1 1 1 J Z/50 qqo yzo )116 4(yJ a SCALE - 1 10 LOT �S Fwtlnvc fd Ho�,;e- i w _ Coo �d &� 90 1C� 114 Ia0 1'0 Lt f1`�r �cmj-/P4zK�,.1F/WA 473- //22 WO m LOT S(o 41,56 1 1 1 t r�Jl 436 420 416 ytV 0 10 120 30 Hp 50 W �eet !10 GzD i3o I10 SCALE: 1 is * 9�3 -1122 w LOT 57 11 Fhinr2 GrRht. fill y� 920 Id �a 30 `ib S� (00 SCALE: I "- 10 • 1 1 1 t 90 KEG IIO Izo i3o WQ HC- +uop /PAP—r-L k)fIwA 973-14 LOT �S yid - O to zo 30 yd SCALE . )" _ / 0 . So yb Flo Izo 13� No P-r� 9e /PARKLA►r/V.4 9-7-3 - 11;22 STABILITY ANALYSIS Golder Associates I I s ._1 I C L.� n V) m ZD Z vi O U D L N � U O •� J U N } � N U O E L O O O O O O O 00 w N r +aai) SIXd—,. O r L O N M a 0 FEB. 4. 1998 11:18AM NO.3893 P. 1 PARKLANE VENTURES 31620 23RD AVENUE, SUITE 320 FEDERAL WAY, WA 98003 (253) 946-3652 FAX (253) 946-3580 February 4, 1998 VIA FAX (253) 661-4129 Mr, Jim Harris, Senior Planner City of Federal Way 33530 First Avenue South Federal Way, WA 98003-6210 Re: Heritage Woods - Tracts H & J Grading Permit Application Dear J i m: Upon receipt and review of the Giles review letter of January 21, which I received from you January 27, 1 commissioned Golder & Associates to review and address the recommendations and conclusions of the Giles report. Enclosed please find a copy of the Golder letter, which responds to each of the recommendations in the Giles January 21 letter, and provides the stability analysis and rockery design requested by Giles. Please have Giles review the Golder letter and the stability analysis and rockery design that Giles requested. I trust this provides the city a complete response to all of the issues and concerns raised in the Giles report. You have indicated that within the City's comprehensive plan that the City has the discretion to request an Indemnification Agreement as part of the Grading Permit conditions. We want to avoid an Indemnification Agreement requirement as it would be difficult to market the homes built on those lots and obtain insurance. We prefer to understand and mitigate any concerns the City has, and address these concerns in the design of the grading plan, and any special conditions the City would impose in the grading permit, to eliminate such concerns. As we have advised, we would accept the condition that the grading take place in the summer months, with quality fill material and optimum moisture content to insure 95% compaction. Please advise me of any further conditions you would impose before issuing the condition that an indemnification Agreement be required. Sincerely, David W. Morrison DWM: st M. Gino Nonni, Parklane Golder Associates Inc. 4104 -148th Avenue, N.E. Redmond, WA 98052 Telephone (425) 883-0777 Fax (425) 882-5498 February 4,1998 ParkLane Ventures, Inc. 31620 23rd Avenue South Suite #320 Federal Way, Washington 98003 ATTENTION: Mr. David Morrison RE: RESPONSE TO GILES ENGINEERING ASSOCIATES REVIEW LETTER DATED JANUARY 21,1998 HERITAGE WOODS TRACT H AND J OF DIVISION 1 FEDERAL WAY, WASHINGTON Dear David: W _� Golder Associates Our ref.: 973-1122 RECEIVED BY COMMUNITY DEVELOPM 11 DEPARTMENT We have prepared this letter to respond to the five recommendations contained in the review comment letter by Giles referenced above. A copy of the recommendations are attached to this letter for reference. Our responses are presented below. Response to Recommendation #1 We feel the drainage improvements completed to date and planned for completion prior to lot grading are adequate. If we observe conditions during grading of the site that suggest that they need to be augmented we will make those recommendations at that time. We have attached the results of the stability analysis of the critical section on lot 54 showing the final 2HAV slope configuration. It is redundant and unnecessary to complete a stability analysis for each house lot when by inspection the slope and ground conditions clearly present a more stable section than that analyzed on lot 54. By inspection it was clear that the minimum calculated factor of safety (FS) will be for shallow failures along the 2H:1 V slope. The results indicated the following - SHALLOW SURFACE: The shallow surfaces always resulted in the lowest FS with the value equal to Tangy/tang where � = 36 degrees in the new fill and (3 = 26.5 degrees (2HAV slope). This results in a FS = 1.5. The XSTABL runs indicated 1.5 as shown on the attached Figure and Output file. OFFICES IN AUSTRALIA, CANADA, GERMANY, HUNGARY, ITALY, SWEDEN, UNITED KINGDOM, UNITED STATES February 4,1998 2 973-1122 • DEEP SURFACES: We modified the search routine to produce a deeper surface involving the loose fill layer. As shown on the attached XSTABL output graph, the FS was over 2.0. DEEP SURFACE HIGH WATER TABLE: We also assumed a high water table at the base of the new granular fill layer. The stability results were the same as those reported above. Based on these results, the permanent slopes meet the required FS of 1.5. This meets standard engineering practice for permanent slopes and implies a low risk of slope failure. Since the minimum FS occurs on the outer 2H:1V slope, the risk of any slope movement damaging the proposed houses is even less. In our opinion it is not credible for slope movement to damage the house or cause "... failing by collapse or becoming dangerous and/or uninhabitable due to slope movement.. " (City of Federal Way language). Thus the proposed slope design more then meets the City's requirement of "less than a 25 percent chance of failing ... within 50 years...". Response to Recommendation #2 The groundwater conditions we modeled in our stability analysis were based on direct observations in the explorations made during our site investigation. We took those existing conditions and conservatively applied a higher groundwater condition during our stability analysis to account for unanticipated and seasonally higher groundwater conditions. We feel this approach is adequate and monitoring the French drain is not necessary. The drain construction was observed by a member of our staff and was installed in accordance with the design. The drain construction will be completed during the final site grading. If we observe any problems with the drain operation they will be corrected at that time. We will continually assess the site conditions during construction in 1998 and make additional recommendations as necessary. The recommendations made to date reflect the conditions as we currently see them. Response to Recommendation #3 It is our understanding that the site grading will be done during the summer months to take best advantage of the dry conditions during preparation of the toe area of the lots for fill placement. In addition, the fill source anticipated for the grading operation will likely not be dry enough to place till the summer months. We will provide construction monitoring and testing during the site preparation and grading operation. Unsuitable fill and foundation subgrade material will be remediated and recompacted to the specifications or removed and replaced. Erosion control measures were prepared by Jaeger Engineers and are shown on their drawing dated October 6,1997. Golder Associates February 4,1998 3 973-1122 Response to Recommendation #4 We have provided a reinforced rockery design with this letter for the rockery at the property line on Lots 57 and 58. Response to Recommendation #5 We concur with the statement contained in this recommendation. However, on lots 56 through 58 the wedge of roadway embankment fill expected to extend beneath the house foundation is quite small and we recommend that its suitability be evaluated during grading in the summer of 1998. If the material can be compacted to 95% of ASTM D-1557 during benching and grading then we recommend leaving it in place. If not, the material will be removed and the new fill placed on competent native ground. We trust these responses meet your needs. If you have any questions, please give us a call. Sincerely, GOLDER ASSOCIATES INC. —Allnes G. Johnson Ass late daolozist l i Robert lum, P.E. Principal JGJ/RLP/rlw "gjl.aoc Golder Associates FIGURE Golder Associates NOTES: FINISH GRADE (2H:1V) (PROVIDE EROSION PROTECTION) EXISTING GRADE DESIGN GEOGRID LENGTH •(L) -____-- LAYJER �= LAYLAY"KEY-IN" FILL CUTTING STEPS (2 FT MAX HEIGHT) IN BACK SLOPE. , �� __ ___LA GEOGRID REINFORCEMENT _ �- LAYER 4_ (SEE NOTES 1 & 2) -� STRUCTURAL BACKFILL (D) LAYER 2 CONTRACTOR TO MAINTAIN SAFE DYER 1 CONSTRUCTION SLOPES , NATIVE, COMPACT OR DENSE SUBGRADE MSE WALL AND ROCKERY WALL FOUNDATION SUBGRADES SHALL BE APPROVED BY THE GEOTECHNICAL ENGINEER PRIOR TO BEGINNING CONSTRUCTION EXISTING GRADE 1 6 (MAX.) 6'-0" 7'-6" 1. Reinfarcernent shall consist of a geogrld equivalent to or exceeding Tansor UX140OHS. The geogrld shall conform to the minimum physical requirements as indicated below. Prior to deploying the geogrld reinforcement, the Contractor shall submit to the Engineer a manufacturer's certificate of compliance. The geogrld reinforcement shall be free from defects or damage. If the geogrid is stored on site, the Contractor shall take measures to protect It from damage, keep it free from dust and dirt, and cover It vlth an opaque plastic sheet to prevent degradation from ultra -violet light. REINFORCEMENT LAYER SCHEDULE MINIMUM PHYSICAL PROPERTY REQUIREMENTS: Spacing Reinforcement Between Layer No. Length (L)* Layers (D) 8 6.5 It 7 6.5 ft 6 6.5 ft 5 6.5 ft 4 6.5 ft 3 6.5 It 2 6.5 ft 1 6.5 ft EMBEDMENT l'-6" (MIN.) FOUR LARGE MAN ROCK (MIN.) FOUNDATION DRAIN 1 TYPICAL -DESIGN SECTION OF B-FOOT HIGH MSE WALL - LOT 57 0 5 10 1 FEET FINISH GRADE (2H:1 V) (PROVIDE EROSION PROTECTION) DESIGN GEOGRID LENGTH (L) "KEY -IN" FILL CUTTING STEPS (2 FT MAX HEIGHT) IN BACK SLOPE. f� , �. ___-_LAYER 5- LAYER 4 - STRUCTURAL BACKFILL (D) LAYER 2 LAYER i CONTRACTOR TO MAINTAIN SAFE CONSTRUCTION SLOPES , GEOGRID REINFORCEMENT - (SEE NOTES 1 & 2) NATIVE, COMPACT OR DENSE SUBGRADE MSE WALL AND ROCKERY WALL FOUNDATION SUBGRADES SHALL BE APPROVED BY THE GEOTECHNICAL ENGINEER PRIOR TO BEGINNING CONSTRUCTION 1 6 (MAX.) 5'-6" 1.0 ft 1.0 ff 1.0 ft 1.0 ff 1.0 ft 1.0 ft 1.0 ft REINFORCEMENT LAYER SCHEDULE Spacing Reinforcement Between Layer No. Length (L)• Layers (D) 5 5.0 It 4 5.0 ft 3 5.0 ft 2 5.0 ft 1 5.0 ft -EMBEDMENT 1'-6" (MIN.) FOUR LARGE MAN ROCK (MIN.) 3 FOUNDATION DRAIN F.1 Ultimate Strength (unfactored). . . . . 4,570 Ibs/ft (GRI-GGI guidelines) LTDS, well graded Sand & Gravel . . .1,700 Ibs/ft (GRI-GGI guidelines) 2. The reinforcement shall form horizontally continuous layers. Except where a second layer of grid is required at the return wall face, no overlaps or seams shall be oriented parallel to the face of the wall. The Con'ractor may loin the reinforcement by overlapping it a minimum of 18-hi ches such that the seams are oriented perpendicular to the face of the wall. The Contractor shall ensure that the geogrld is deployed so that the geogrld strength is In the direction perpendicular to the face of the wall and meets the specified minimum physical properties. 3. The contractor shall use falsework at the face of the wall to provide temporary support during the placement of each lift. 4. Structural fill shall be compacted to at least 95 percent of the Maximum Modified Proctor density (ASTM D-1557). Structural fill shall mnet the gradation requirements listed in these notes. 5. Heavy compaction equipment shall remain at least two (2) feet from the face of the wall. Structural fill placed within three feet of the face of the wall shall be compacted firmly using a minimum of two passes with light compaction equipment. No vehicles shall operate directly on the reinforcement. A minirium of six -inches of fill shall be placed on the reinforcement before equipment may operate on it. 6. Drain 1,,•avel shall consist of clean gravel and shall meet the gradation requirements listed In these notes. GRADATION REQUIREMENTS U.S. STANDARD PERCENT PASSING BY DRY WEIGHT SIEVE SIZE STRUCTURAL FILL DRAIN GRAVEL 2-1/2 INCH 100 100 3/4 INCH 100 70 - 100 NO. 4 25 - 100 30 - 60 N0. 10 10 - 80 20 - 50 NO. 40 0 - 35 10 - 30 NO. 200 0 - 10 0 - 2 7. A geotextile fabric shall be placed under drain gravel as shown. The geotextile shall consist of a nonwoven, polyester or polyethylene filter fabric with a minimum flow rate of 120 gpm/ft2 (ASTM 0-4491), and a minimum Grab Tensile strength of 120 Ibs as measured by ASTM D 4632. B. Golder 4ssociates shall Inspect the condition of foundation to determine suitability and to provide recommendations if improvemeni Is necessary. 9• The Reinforced Rockery Wall design Is based on the plan titled "Heritage Wood, Tract H & J, Lot Grading Plan," prepared by Jaeger Engineering, dated October 6, 1997. GEOTEXTILE FABRIC (SEE `. DRAIN GRAVEL AS SPECIFIED 4-INCH (MIN) WAS& f fClg " 6-INCH DIAM. PERFORATED CPE DRAIN PIPE SLOPED TO r PROVIDE POSITIVE DRAINAGE AND CONNECT TO SITE 12-INCH (MIN) DRAINAGE SYSTEM ,2932i S FOUNDATION DRAIN PIPE �,c�f���IS"t����."� �4 r F 1 NOT TO SCALE �51p:aALY FIGURE l REINFORCED ROCKERY WALL SECTIONS PARKLANE/HERITAGE WOODS/WA C:\CAD\AG\9731122\74061RO 2-1-98 15:29 xrf: NONE Golder Associates ATTACHMENTS Golder Associates a N LO 11 (n O 11 n 0 cn m Z vi O U a 4-- V) U a •L- � U N O O O D F-r I O O O 0 00 cD r-- 099j) slxv—J\ 0 N O N 0 It N I I V) 0 n 0 Cn m Z N V a r V) (D — Q � U � U i7 } N d' O OO T- O O O 00 O "It (+aai) slxv—,� a �1 0 O r 0 N r In O N 0 1�V1111L VV•, r LL 1 LVV 1 LV YVYJ +!u„ �.- � _ .. _. .111 (1II (� GtT1 OF FI I)1 RA), 11AY 16,13 FAX N'J.5d4 �i�?I�I�E (Il%Y7'A8 I'IF: 2;r3fi61.��2A_�.....� - G�.xx�i�aa� GILLS CNOINEEAING PIssOCIATES. INC, • Rrwnl�, CaA d:P766NN C_AL., RWNIONNONUL & CON8TAWMON tNATNWAL1 CONSUL'-AN7* •C1OWTK •wdison.l...c� RtCEIV�D Ell' .M&PA, . MMMuutn EVROP E147I)cPAF • M+►wwlw. w� Jac 2I, 199t3 •SWA WA Ws.nlrvvrarr. A.e. JA N 2 3 iggo city ofV040ral Way 33530 First Way South Fodoral Way, WA 09003-6210 Attention: Stephen Clifton, Dsvelopment Services Manager Subject: Caeotechnical Engineering Revizzw of Slopc Grading Pcoposat Heritage Woods, Traci H and J of pivlsion 1, Lots 52 through 59 Federal Way, Washington Project No. 60-9707028 Dear Mr. Clifton: This lettl~r pre.oats the opWons and concl"orns of Giles Er(gincering Assoaiatcfi, Inc. regw ng geotechnicel cagincering considerations for devslop=nt of the referencl;d residential lnts, a4 noted on plan sheets 1 and 2 of" Heritage Woods, Tr"t R and J, Lot Gra6inyt Plan", by Jaeger Engineering, revision date 12/9/97. "Chose conclusions wvrc mached based upon information developed by: 0 Review of inspection reports flrom temporary stabilization in Call 1997 provided by Goldot Associates, Inc.; Review of information in {Jalder Associates, Inc. geotechnical engineering report dated November 17, 1997, titled "ArAlysis and Rcsults of Slope Saabilization Work. Tract H and J of Division 1, Prellmiria►ry Lots 52 d-rough 59, Heritage 'Woods, Federal Way, W4shiagtan"; • Observation of soil conditions on site during excavation of test pits by the projact contractor on October Is. 1997; • Engineering t;nalysis. Authorization for thcso services was provided in your letter of January 8, t998, which authorivcd our scope of services dated 17ccember 22, 1997. as an amertdm.cnt to our Professional Services Agreernertt for Geotechnicnl Engineering E.zview Services, dated August 6, 1997. The purpose of these services wm limited to an avoAuation of ear'thwork and foundation Construction proposed by the project developer for the referenced aite, based upon the inforrnativn provided to us, This latter is an instrwnestt of service, and the colnel"ions presented herein have beers prarnWgated in accordance with generally accepted professional engineering practice in the held of goottchni, al engineering, Igo other warranty is either expressed or implied. This latter has been prepamd for the exclusive use of the City of Federal Wsy, for specific application to the stated purpoac and s1tc. 11007 Nmh Crook PoM•r►y S oulm • Sulu 102 • Wtxll, WA sac i l 4ZW462.2020 • rU 441V452.1YZ- E-Mall &neat**0'I*S Nr.can'ti 01/23/88 FRI 14:46 I'TX/IZX NO 7401] �M�1ti»b.rw��wM+•newl'ra�fi�.l�.W�ier++�ww.,,: �.ws.. a :.� ,r ., I CL 1-LVC)-f LV-4U4J JQII UIIV IL' W IIUINI`.LJUIY - Lip U1 27%9b j'i1? lfi:14 FAX 1536829128OF FEDERAL 'k11' NDISD4 PaV/ s6 GILES C.NGINEERING OSSMIATES, INC. City of Federal Way Project No. 6G-9707028 January 21,1999 Page 2 SfTt AND PROJECT DESCRIMON Our tenter dated August 25, 1997 ptoviW a description of the project site and conditions. Subsequent to that letter, the developer completed temporary stabilisation of portions of tine project site dwing October 1997. no Golder Associates reporl dated November 17, 1997 describes the temporary stabilization. The site conditions were evaluated by Golder Assocsstas, Inc.. following the slope failures, for the purpose of providinj options for Iot grading aztd constructicn. Colder Assmiates provided three gentechnical reports which wem impplied to us by the City for review. These reports were dated dune 23, July 14, and November 17, 1997. The Jute 23, 1997 report includes information regarding soil and groundwater conditions,, inolw1i.rig the logs of six test pits excavated on Juno 15, 1997, The July 114 toport container a vxumaty of grading a]tematives for lofts 52 through 59, which were based on confiigLzatioru of the lots such 45 setbuks, slopes, and grades provided by Schneider Hornes. TheNovember 17 report includes description of temporary slope repair work, additional investigation results on Lots 53 and 54, slope =bility artolysis on lot 54 using recent exploration data, and recornmendatiom for additiorul lot grading. The Jwgcr Engineer grading plan reviewed for thin study mfiec% the geutcchrdcal recamL mtndations of Golder Amoclates' November 17, 1997 report. Site conditions were Observed by a geologist from our flan an October I5, 1997. The pose of this reconnaissarue was to evaluate soil conditions in test pits excavated in fill within the amha ikaicat side slope on iota S3 and 54, The test pits ewcuntemed a significant quantity end depth of very loose, wet to swumtcd fill within tits embankrrant side slope. The fill consisted of silty sand with gravel. The fitl beneath the roadway prism % au found to be relatively dense, based on information in the Golder Associates' report and ow observations. As 4 part of this review, we reviewed plan sitters 1 and 2 by laoSer Znginrering, dated October 8, 1997, A11h revision dated Demuber 9, 1997 for sheSt 1. 11.4 plan shoats contain genteral notes, a detail for interceptor vvnch drain tortstntction, Ml specifications, and crow-sctians throw lots 52 through 58 indicating existing grades and propos4 final lot grades. Ira gcncrai, the proposed lot grades will result in fill depths of up to 20 feet on portions of the lots) Tho toe of fill extends up to 4S feet ewt of the existing property lint. The tot of fill is proposed to ix rezainc-,d by a reirtforced fill and rockery at lots 57 And 58. Fill dopes arc designed for it 2H-.IV (Horizontal, Veit cal) inclination. Golder Associates, Inc. also rt v,,cwcd the. grading plan submittal, and eontmrrrted on several specific nspeel$ of the grading plan In their November 17, 1997 report. On gage 5 of the raferenced Oolder report, Golder states that the permwncrrt slope cornflgumdons shown an tho Sn ing plan will have a facw r of safety on the or4or of I.S. assuming the recortta ondations in the Colder report and the 7®eger Engineering grading letter we followed. _4 01/23/99 1"RI 14,46 M/ttx NO 74071 J �i ,mo Lnv 1 U US . I,IUNN 1JUN 1 CL 1-ZUO- f LU-4U4J pan Lr o 10j 004 4�1•'2iIItS 'fCE IFi:}5 FAX 253N614129_,_.".. •.. . CITY OF rET)FRAL l+�,r GILES CNOINEFRING C-)SSOCIATM INC. City of Fcdeml way Projtct No. 60-9707029 January 21,1999 Page 3 CONCLUSIONNS filso fallowing swrimasry dcscribos our undetrs=dirlg of the critical geotcchnical design and construction issues and corresponding conclusions. If other conditions exist of which we arc unaware. we should be consulted for poWblt modification of our conclusions and recommendations. Golder Assmiates has chamterized Else sideslope: of the. 25' Place South arnbalnkrnent on Iots 51 and 54 as wet, Wow silty sand with We to some grott, and Golder Associates concludes that the fill embankment duos not apppear to be wolf compacted. It is our opWon that the slope failures and conditions noted by Golder Associates n1l indicate dot doors is a substantial risk that the portions of the ernharlkment proposed for house consawrion on other lots in addition to lot 53 end 54, era comprised of loovly computed fill. Temporary stabilization of the embankment fill only involved btaching aid pla=gaunt ofquwry spall fill can lots 53 and 54, and consrruoting a fronch drain at the tot of elope, Plastic shmizg was e>sad io cover lots 52 through 54, We am concemed with the wet conditiora of the embarykment fill considering that drama ►vrte installed two weeks before our October 15, I997 evaluation of embarkment fill, Golder Associases recommends tbat the drain be augmenW at lot 55. A slope stabiEty analysis; was completed by Golder Associates on lot 54, wltich Ooldeer considered the crldcal section of embarkkment fill. 'Mc slope stability "ysis was only comptemd for temporary slope repair for winter of 1997-1998, The calculated safety factor is I.l. Although Golder Asso6ales concludes that the plamed perneAcm slops c onftgurations will have a factor of safety of 1.5, calculations and supporring iaafornution were not inclu&4 in the Golder Associates` November 1997 report. Golder recommends that portions of house foundations on lots 53, 54, and 55 wnderlean by loose fill be supported by auger cast, or small diameter steel pipe piles. In addition, they state that tanaining foundations Will only have a small thickness of existing fill at depth, acrid will be supported *aa sttutuW fill to be placed later, or on Wive soils. In our opinion, whtre foundations are not supporwd by piles or native soils, signifsc&M risk would exist for foundation stultmGent if informsLion is not provided which produms grcatsr confidence in the supporting characteristics of the cnisting fill, it stmuid bb assumed that any improvcments consttucted aver it would be subject to long-term settlements unless supported on piles or deep foundations. 01/23/96 FRI 14:46 tTX/THY ND 74071 .1 Q11 L I a - 1—LVU—( LV-4V4� W(]Vi) U1 :'.7/i►6 1') l: ]6: 1d I';1.1 2S3E619,] 29 __ ..., . CTTV F F'FI)rR•1). «A'� N(3,504 P[�t35f906 r ��++ GILES GNGINEERINQ e�)831DC1ATES, INC. City of Foddaral Way Project No. 60-9707028 January 21, 1999 Page 4 Tht Site grading alternatives presented in the Golder NDvernber 17, 1997 report indicate that permission from the city was given to fill cast of �hG propcity Urie at lots 52 through 56. Lots 57 and 58 will have rockery walls at the property lint, and rein orc4d fill, at the rase of fill slopes. in general, extemion of the fill limit east of the property line will improver st Wity of the completed fill, by increasing tha butuess of the existing, questionable fill. Golder Associates has riot provided specific design recorr>;mcnilations or stability aneysis of the reinforced fill and rockery sections of the sloping fills, RECOMMENDATIONS Our recommendations are bawd on the available information; if additional information is provided. these recommendations may require modification. We recommend the following. 1. Lot grading in the affe=d acne should be designed to both provide a factor of safety equal to 1.5 or more for stability of the completed fill, and to provide adequate bearing capacity and settlemnt parformancm of the completed housos. Additiorutlly, lot grading should incorporate dmirsagc improvements to collect and divert sub$utfue wrier and mitiom effects of this waiter on both the ro&4wey and lot fills, Supplemental documertwdoa should include the description of and roults of stability analysis for the final grading of iota 52 through 58. 2. Groundwater clanditions should be established by monitoring the prerfornzance of the interceptor dtxin presently in place, or by ether mmu, 11w stability analysis should be based on groundwater conditions established by fuse means. The drainage should be supplernenW,, If necoss ry. 3. The design for lot grading should irclude all crosioa control mcasures, and grading criterid, typically required for wet was liar construction. These criteria may be d"ndent on the moisture sensitivity of the fill source. 4. Spaciflc design and stability of pl=cd reinforced fill and rookery construction on IM 57 and 58 should be completed. S. Design for any foundatiam supported over existing fill (as shown on Figure I of the November 17, 1997 Golder Associates rgmrt), should consist of deep foundatioas, footings extended through the fill to suitable nativa sail, or footings supported on cornpUted struetural fill placed on suitable native soil following removal of existing fill, based on tho available information. All of the available information indicates that the exinhig embankment sideslope fill presents a risk of settlement of structures built abova it. 01/23/98 FRI 14:48 (TX/RX NO 7407) Lin lU w. I'I UfCI1110Ul'V 01 /17/ 96� '1'1'H 16: 1 7 FAX 2536614129 i7'i' Of' FE'D RAL WAY 141�`J ND. f: OM/006 GILES ENZINEERINO P)SSOCIATES, INC. City of Federal Way Project No. 64-9707028 January 21,1998 Page 5 We appreciate this oppomrAty to provide these services, Flease call if you have any questions or need edditioml. infarmatiom We are available to review additional subrniWs received on these maners. or to meet with City st H to discuss these matters at your request. cc: Mr. Jim Hari` Senior Planner City of Federal Way filly s AQUitt4 OTLES ENUTINEEM0 ASSOCIATES, INC. 7 , F�#netrittg �of�Iog 4. John E. zippa, P.E. RCglorw M1w*r t rB 'v,+ �`4rQ14 ;,�Y+r, x 01/23/98 FRI 14:48 [TI/R1: NO 7407) RECEIVED BY COMMUNITY DEVELOPMENT 1,111A MAFNT 1 /16/98 Mr. Jim Harris, Planner City of Federal Way 33530 1 st Way So. Federal Way, WA 98003 Re: Heritage Woods, Div. 1 - Tracts H & J. Grading Permit - Revised Landscape Plan. Dear Jim; PARKLANN E ParkLane Executive Center 31620-23rd Avenue South #320 Federal Way, Washington 98003 Telephone: (206) 946-3652 Fax: (206) 946-3580 Per your request, please find enclosed, 2 copies of the Revised Landscape Plan, prepared by Landscape Professionals for Shcneider Homes, and reviewed and approved with an enclosed letter from Jim Johnson of Golder and Associates. Sincerely, David W. Morrison We are committed to tlttality, value and service to f�freap nnr d excee rs'� tirra�?rs and crtccei rtrrir expectations. _7 1 Golder Associates Inc. -7 4104 -148th Avenue, N.E. Redmond, WA 98052 Telephone (425) 883-0777 Fax(425) 882-5498 January 13,1998 ParkLane Ventures, Inc. 31620 23rd Avenue South Suite #320 Federal Way, WA 98003 ATTENTION: Mr. David Morrison RE: COMMENTS ON PROPOSED LANDSCAPE PLAN FOR HERITAGE WOODS TRACT H AND J OF DIVISION 1 FEDERAL WAY, WASHINGTON Dear David: AGoldex stes Our ref: 973-1122 We have completed our review of the landscaping plan for the above referenced project. The purpose of our plan review, as required by the City of Federal Way, was to comment on how the plan will affect the short and long term stability of the site slopes. The plan titled "Heritage Woods Hydroseeding Plan Lots 52-58", dated January 4,1998 was prepared for Schneider Homes by Landscape Professionals. A copy of the plan is attached with this letter. The single plan sheet contains a plan view of the lots with symbols indicating the type of landscaping to be installed and a typical cross section of the slope. The plan does not address surface water control or seepage. Subsurface seepage is addressed in Golder Associates Inc. report dated November 17,1997 and surface water control will presumably be the responsibility of the builder utilizing proper sloping and control of roof gutter downspout discharge. In general, the landscape plan addresses the critical aspects of short and long term erosion protection and therefore enhances the long term slope stability. The following _a additional items were brought to the attention of Mr. Daniel Richter of Landscape Professionals who will incorporate them into the final plan. e The hydroseed mix for the lawn area will be specified on the plan. • The 2H:1V slope below the yard will receive, in addition to the tree and shrub plantings, an application of a WSDOT approved hydroseed mix with a tackifier suitable for application on steep slope areas. We do not feel it is necessary to apply a fabric matting or stabilization fabric on the 2H:1V slopes. Our experience with these products indicates that on a rough soil surface rilling often takes place under the fabric mat. The hydroseed with a tackifier adheres to the rough contours of the soil - J OFFICES IN AUSTRALIA, CANADA, GERMANY, HUNGARY, ITALY, SWEDEN, UNITED KINGDOM, UNITED STATES January 13, 1998 2 973-1122 surface and does a better job of erosion protection. The hydroseed must be applied during the recommended time of year to assure proper germination prior to the onset of heavy winter rains. If the hydroseeding does not get done in time the slopes should be completely covered with plastic sheeting to protect from erosion damage. Proper implementation of the landscape plan should enhance both the short and long- term stability of the slopes. We trust this letter meets your needs. If you have any questions, please give us a call. Sincerely, GOLDER ASSOCIATES INC. James G. Johnson Associate Geologist JGJ/ta 0113jgj1.dcc Attachment J I J I rJ Golder Associates Golder Associates Inc. hIJNIRDEVELOPMENTCEB DEPARTMENT Cn�1 4104 -148th Avenue, N.E. (9"sociMes Golder Redmond, WA 98052 F`� Telephone (425) 883-0777 J V L 17 9 f997 Fox (425) 882-5498 July 14,1997 Our ref.: 973-1122 ParkLane Ventures, Inc. 31620 23rd Avenue South, Suite #320 Federal Way, WA 98003 ATTENTION: Mr. David Morrison RE: PROPOSED SITE GRADING ALTERNATIVES HERITAGE WOODS TRACT H AND J OF DIVISION 1 PRELIMINARY LOTS 52 THROUGH 58 FEDERAL WAY, WASHINGTON Dear David: Golder Associates (GAI) is pleased to present this letter report summarizing the proposed site grading alternatives for Lots 52 through 58, Heritage Woods Tract H and J of Division 1. After several meetings and discussions of preliminary grading options we present in this report the fill and grading alternatives you selected. This filling and grading is intended to be constructed in addition to the slope stabilization measures we presented in our report to you dated June 23,1997. The grading will include filling the site to provide a pad for house construction and a back yard with a maximum slope of 3HA V. Our analyses were based on the information provided by Schneider Homes and Jaeger Engineering. Schneider Homes provided the configurations for the front driveway, house pad, 20-foot wide backyard with a maximum slope of 6%, and the remainder of the backyard with a slope of 3H:1V within the lot. Jaeger Engineering provided typical cross sections of existing grades for each lot. This information was used to generate the cross sections shown in Figures 1 through 7. The fill alternatives contain essentially two options with a variation for lots 57 and 58 if desired. Each fill alternative is identical within the lot boundaries and include the driveway, house and backyard grading provided by Schneider Homes. Outside the lot boundary at the toe of the slope we have shown two fill alternatives. Alternative 1 is to continue to fill at a constant 3H:1V slope into the adjacent buffer area. Alternative 2 is OFFICES IN AUSTRALIA, CANADA, GERMANY, HUNGARY, ITALY, SWEDEN, UNITED KINGDOM, UNITED STATES July 14,1997 2 973-1122 developed to reduce the filling outside the lot boundary by constructing a steeper, 2H:1V slope. These fill configurations are shown on Figures 1 through 5. If you wish to reduce the area of the fill, for example on lots 57 and 58 which abut a wetland buffer than the variant shown on Figure 6 and 7 may be applicable. The rockery wall could be constructed against the fill provided the fill is compacted and over -built and then cut back The maximum rockery height should be about five feet. We believe all of the above alternatives are geotechnically feasible for construction. However, Alternative 2 may be preferred because it reduces the total fill amount and the distance the fill would be placed off the lots. We have shown the approximate toe of the fill slopes for above mentioned alternatives in the attached Site Plan. Based on the Site Plan prepared by Jaeger Engineering and dated December 1994, the above mentioned filling Alternatives 1 and 2 will not encroach into the wetland buffer zone for Lots 52 through 56. However, the filling alternatives encroach into a 100-foot buffer zone for Lots 57 and 58. We trust this report meets your needs. If you have any questions or require additional information, please contact us. Sincerely, GOLDER ASSOCIATES INC. A. Ga alasin P gam Project Engineer a mes G. Jo on Associate cc: Jim Jaeger, Jaeger Engineering Attachments: Figures 1 through 7 Site Plan AG/JGJ/rlw on4agl.aoc Golder Associates Golder Associates Inc. Client: Parklane Ventures Project: Heritage Woods By: AG Checked By: Job No.: 973-1122 EXHIBIT A A ESTIMATED FILL VOLUMES FOR BENCED MSE WALL AND SLOPED FILL IN ADJACENT PROPERTY ATERNATIVES .::.:: ....... .. L,CS..IIS(flFLlfL1f7 F�IEerfia.. tives:... ..., . ' ,• . se pill •'ICY} €.at;..• ., 5trlly.bLLwr ,. Lot .._ ...... ... .`. • :�,.::s;:�i�` .fi. 3 Lots::�:3 8e�:54 .F.##�:: 54:::�;.' 68 :::�.Z.:.>;:::.:.:: :r Sa:>;�;; SF !�-•>::1 5i Benched MSE Wall 982 2,953 1,477 4,101 3,978 3,300 2,635 1,716 21,141 26,426 2H:1V Fill Slope in Adjacent Property 1,202 3,969 1,967 5,101 4,956 3,567 3,200 1,923 25,885 32,356 3H:1V Fill Slope in Adjacent Propert 1,609 4,627 2,255 5,765 5,606 3,767 3,537 2,095 29,261 36,576 6/24197 1 HERWOODSALS FIGURES Golder Associates 450 < 20 ft 22 ft ' 440 — 10% � 24 ft 430 — _ 20 ft Up to 6% w 420 0 d 410— W Existing Grad( 400 390 3801- - I F I I V I 0 10 20 30 40 50 60 70 80 9C He NOTES 0 15 Existing grade profile was provided by Jaeger Engineering FEET Proposed grade configuration within the lot was provided by Schneider Homes FIGURE 1 TYPICAL CROSS SECTION OF LOT 52 PARKLANE/HERITAGE WOODSM/A PROJECT NO. 973 1122 DRAWING NO 73533 DATE 7/11/97 DRAWN BY EA Golder Associates 450 440 430 w 420 c 0 :r ca 410 w 400 0 10 20 30 40 NOTES Fill Alternative 1 ? Yzt \ Fill Alternative 2 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 Horizontal Distance (feet) 0 15 Existing grade profile was provided by Jaeger Engineering FEET Proposed grade configuration within the lot was provided by Schneider Homes FIGURE 2 TYPICAL CROSS SECTION OF LOT 53 PARKLANE/HERITAGE WOODSMA PROJECT NO. 973 1122 DRAWING NO. 73534 DATE 7/11/97 DRAWN BY EA Golder Associates 450 440 430 420 c 0 co 410 w 3 400 390 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 Horizontal Distance (feet) NOTES 0 15 Existing grade profile was provided i•r>r by Jaeger Engineering FEET Proposed grade configuration within the lot was provided by Schneider Homes PROJECT NO. 9731122 DRAWING NO. 73535 DATE 7/11/97 DRAWN BY EA FIGURE 4 TYPICAL CROSS SECTION OF LOT 54 PARKLANE/HERITAGE WOODSMA Golder Associates 450 440 430 y 420 w 400 390 380 0 10 20 30 40 50 60 M-IM Existing grade profile was provided 0 15 by Jaeger Engineering � M FEET Proposed grade configuration within the lot was provided by Schneider Homes PROJECT NO. 973 1122 DRAWING NO. 73536 DATE 7/10197 DRAWN BY EA Line 70 80 90 100 110 120 130 140 150 160 170 180 190 200 Horizontal Distance (feet) FIGURE A TYPICAL CROSS SECTION OF LOT 55 PARKLANE/HERITAGE WOODSMA Golder Associates 460 450 440 430 w 410 .ine Fill Alternative 1 - ,_ _ Fill Alternative 2 400 390 380 I 1 I TI 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 Horizontal Distance (feet) NOTES 0 15 Existing grade profile was provided by Jaeger Engineering FEET Proposed grade configuration within the lot was provided by Schneider Homes FIGURE C TYPICAL CROSS SECTION OF LOT 56 PARKLANEMERITAGE WOODSMA PROJECT NO. 9731122 DRAWING NO. 73537 DATE 7/11/97 DRAWN BY EA Golder Associates 460 450 440 430 m a 420 c m w 410 400 qC1 ne 15ft F ( 10 20 30 40 50 60 70 80 90 100 110 120' 130 140 Horizontal Distance (feet) NOTES 0 15 Existing grade profile was provided MMMMW by Jaeger Engineering FEET Proposed grade configuration within the lot was provided by Schneider Homes FIGURE 6 TYPICAL CROSS SECTION OF LOT 57 PAR KLAN EMER ITAGE WOODSMA PROJECT NO. 973 1122 DRAWING NO. 73538 DATE 7/10/97 DRAWN BY EA Golder Associates 380 -f 0 10 20 30 40 50 60 NOTES 0 15 Existing grade profile was provided by Jaeger Engineering FEET Proposed grade configuration within the lot was provided by Schneider Homes 20 ft Up to6% Existing Grade 70 80 JO Horiz( FIGURE 7 TYPICAL CROSS SECTION OF LOT 58 PARKLANEHERITAGE WOODSMA PROJECT NO. 973 1122 DRAWING NO. 73539 DATE 7/11197 DRAWN BY EA Golder Associates No��, /� t 370 JAEGER ENGINEERING a M � WETLAND CONSULTANT AUTHORIZATION FORM DATE 4 September 1997 CITY City of Federal Way 33530 First Way South Federal Way, Washington 98003 CONSULTANT Adolfson Associates, Inc. 5309 Shilshole Avenue NW Seattle, WA 98107 PROJECT Heritage Woods Mitigation Monitoring Review PROJECT APPLICANT Parklane Ventures, Inc. TASK AUTHORIZATION No. 9727-79A CITY PLANNER Jim Harris Ca � TASK SCOPE (1) Review wetland mitigation sites and monitoring reports for each of two monitoring events in 1997. `.Monitoring reports to be prepared by applicant's consultant. (2) Prepare letter report of findings (20 hrs. Staff scientist, 2 hrs. Senior review, $1,200). (4) Reimbursable (mileage, photography, clerical, etc.): $50.00. TASK SCHEDULE All work to be completed and report submitted to City staff within two weeks of receipt of signed authorization to proceed. TASK COST Not to exceed $1,250.00 without written amendment to this Task Authorization. DELIVERABLES Letter report ACCEPTANCE )ate Date'S�j'�G2 �' WETLAND CONSULTANT AUTHORIZATION FORM DATE 4 September 1997 CITY City of Federal Way 33530 First Way South Federal Way, Washington 98003 CONSULTANT Adolfson Associates, Inc. 5309 Shilshole Avenue NW Seattle, WA 98107 PROJECT Heritage Woods Mitigation Monitoring Review PROJECT APPLICANT Parklane Ventures, Inc. TASK AUTHORIZATION No. 9727-79B CITY PLANNER Jim Harris TASK SCOPE (1) Review wetland mitigation sites and monitoring reports for each of two monitoring events in 1998 Monitoring reports to be prepared by applicant's consultant. (2) Prepare letter report of findings (20 hrs. Staff scientist, 2 hrs. Senior review, $1,240). (4) Reimbursable (mileage, photography, clerical, etc.): $60.00. TASK SCHEDULE All work to be completed and report submitted to City staff within two weeks of receipt of signed authorization to proceed. TASK COST Not to exceed $1,300.00 without written amendment to this Task Authorization. DELIVERABLES Letter report ACCEPTANCE Date City of Federal W DateSt Adolfson Associate ns, Inc. WETLAND CONSULTANT AUTHORIZATION FORM DATE 4 September 1997 CITY City of Federal Way 33530 First Way South Federal Way, Washington 98003 CONSULTANT Adolfson Associates, Inc. 5309 Shilshole Avenue NW Seattle, WA 98107 PROJECT Heritage Woods Mitigation Monitoring Review PROJECT APPLICANT Parklane Ventures, Inc. TASK AUTHORIZATION No. 9727-79C CITY PLANNER Jim Harris TASK SCOPE (1) Review wetland mitigation sites and monitoring report for one:monitoring event in 1999. Monitoring report to be prepared by applicant's consultant. (2) Prepare letter report of findings (10 hr. Staff scientist, 1 hr. Senior review, $610). (4) Reimbursable (mileage, photography, clerical, etc.): $65.00. TASK SCHEDULE All work to be completed and report submitted to City staff within two weeks of receipt of signed authorization to proceed. TASK COST Not to exceed $675.00 without written amendment to this Task Authorization. DELIVERABLES Letter report ACCEPTANCE late �! Date WETLAND CONSULTANT AUTHORIZATION FORM DATE 4 September 1997 CITY City of Federal Way 33530 First Way South Federal Way, Washington 98003 CONSULTANT Adolfson Associates, Inc. 5309 Shilshole Avenue NW Seattle, WA 98107 PROJECT Heritage Woods Mitigation Monitoring Review PROJECT APPLICANT Parklane Ventures, Inc. TASK AUTHORIZATION No. 9727-79D CITY PLANNER Jim Harris TASK SCOPE (1) Review wetland mitigation sites and monitoring report for one monitoring event in 2000. Monitoring report to be prepared by applicant's consultant. (2) Prepare letter report of findings (10 hr. Staff scientist, 1 hr. Senior review, $630). (4) Reimbursable (mileage, photography, clerical, etc.): $70.00. TASK SCHEDULE All work to be completed and report submitted to City staff within two weeks of receipt of signed authorization to proceed. TASK COST Not to exceed $700.00 without written amendment to this Task Authorization. DELIVERABLES Letter report ACCEPTANCE City of Feder aw1, " Adolfson Associations, Inc. Date Date 51 WETLAND CONSULTANT AUTHORIZATION FORM DATE 4 September 1997 CITY City of Federal Way 33530 First Way South Federal Way, Washington 98003 CONSULTANT Adolfson Associates, Inc. 5309 Shilshole Avenue NW Seattle, WA 98107 PROJECT Heritage Woods Mitigation Monitoring Review PROJECT APPLICANT Parklane Ventures, Inc. TASK AUTHORIZATION No. 9727-79E CITY PLANNER Jim Harris TASK SCOPE (1) Review wetland mitigation sites and monitoring report for one monitoring event in 2001. Monitoring report to be prepared by applicant's consultant. (2) Prepare letter report of findings (10 hr. Staff scientist, 1 hr. Senior review, $655). (4) Reimbursable (mileage, photography, clerical, etc.): $75.00. TASK SCHEDULE All work to be completed and report submitted to City staff within two weeks of receipt of signed authorization to proceed. TASK COST Not to exceed $730.00 without written amendment to this Task Authorization. DELIVERABLES Letter report ACCEPTANCE City of Federal W Adolfson Associati Date , p i Date_, 5 c� Inc. BY Kucinski ; cc. NTDEPARTMENT Consulting .1-' 1 2000 Project Planning ■ Environmental Analysis Wetlands Delineation @rVIC@S � m Permits & Licenses Gig Harbor, WA Gary Kucinski, Principal ' 2901 South 40th Street (253) 474-6488 Tacoma, WA 98409 Fax (253) 474-0153 Spring 2000 Monitoring Report Heritage Woods INTRODUCTION Adolfson Associates, Inc. (Adolfson), wetland consultant to the City of Federal Way, has made several recommendations regarding monitoring reports for this project. As a result of that input, a standard format for this report and all future reports has been established. The format will consist of making evaluations of wetland and buffer areas based upon observations taken at a representative sample point within each Wetland Creation Area and Buffer Enhancement Area. The observations will be measured against the performance standards contained within the Supplemental Wetland Creation Plan dated January 1999. In addition, a Progress Table will be included with each monitoring report. The format of the table will be similar to that recommended by Adolfson in their letter dated April 11th 2000. Information to be included will consist of: a Proposed square footage of wetland creation area or buffer. • Actual square footage of wetland creation area or buffer. 9 Whether or not the area is meeting goals. e Recommended actions for each area. Whether the area stands in the schedule of monitoring events. Spring 2000 Heritage We]s August 22"d, 1999 Page 2 of 14 f:7=6*1111111r+ PHASE (Mitigation efforts described by del Moral & Associates in initial plan) Wetland Creation Areas Wetland Creation Area #1 Performance Standard 1. Wetland conditions exist No 2. 80% Vegetation cover and self sustaining Yes 3. Survival rate > 80% Yes Plant height > 50% 4. Ferns?! 50% N/A 5. Minimal abnormal growth N/A 6. Wetland acreage requirements met No Comments and Recommendations The area did not develop into a wetland. Shortfall I incorporated into Phase II. Wetland Creation Area DEA - "A" and #5 Performance Standard 1. Wetland conditions exist 2. 80% Vegetation cover and self sustaining 3. Survival rate > 80% Plant height > 50% 4. Ferns > 50% 5. Minimal abnormal growth 6. Wetland acreage requirements met Comments and Recommendations Yes Yes Yes N/A Yes No The area has developed into a wetland community, 1-111 Spring 2000 Heritage Wow s August 22"d, 1999 Page 3 of 14 Wetland Creation Area #7 Performance Standard _ i 1. Wetland conditions exist 2. 80% Vegetation cover and self sustaining 3. Survival rate > 80% Plant height > 50% 4. Ferns > 50% 5. Minimal abnormal growth 6. Wetland acreage requirements met Comments and Recommendations Wetland Creation Area #8 Performance Standard 2. 80% Vegetation cover and self sustainin 3. Survival rate > 80% Plant height> 50% 4. Ferns > 50% 5. Minimal abnormal growth however, acreage requirements are not met. Shortfall incorporated into Phase II. Yes Yes Yes Yes Yes Yes The area looks excellent. The small shortfall has been incorporated into Phase II. Yes Yes Yes Yes Yes 6. Wetland acreage requirements met Yes I Comments and Recommendations Wetland acreage exceeds design amount. Plant diversity increasing. Spring 2000 Heritage Wds August 22"d, 1999 Page 4 of 14 Buffer Enhancement Areas Buffer Enhancement Area #1 Performance Standards - No specific performance standards were established for buffer areas. Comments and Recommendations: ■ This area requires some attention. It may have been overlooked due to the concentrated efforts made on wetlands construction. Weed out some sapling red alder trees to reduce competition with planted species. Replace dead plants with equal numbers of the same kinds. Water as necessary. Buffer Enhancement Area #2 Performance Standards - No specific performance standards were established for buffer areas. Comments and Recommendations: This area still requires some attention. It appears that the trail from Military Road will continued to be used for access. Perhaps the best solution would be to "move" the buffer enhancement area slightly toward the northeast where the probability of disturbance will be less. Buffer Enhancement Area #3 Performance Standards - No specific performance standards were established for buffer areas. Comments and Recommendations: Previously made recommendations have been implemented. See the enclosed "As Built" drawing. Buffer Enhancement Area #4 Performance Standards - No specific performance standards were established for buffer areas. Comments and Recommendations: Spring 2000 Heritage Wu,,ds August 22"d, 1999 Page 5 of 14 • Previously made recommendations have been implemented. Keep sapling firs watered. Control undesirable invasive volunteers. Buffer Enhancement Area #5 Performance Standards - No specific performance standards were established for buffer areas. Comments and Recommendations: • Previously made recommendations have been implemented. See enclosed "As Built" drawing. Detention Pond Buffer Area Performance Standards - No specific performance standards were established for buffer areas. Comments and Recommendations: Previously made recommendations have been implemented. Keep firs watered. Vandalism may be a problem. PHASE II (Mitigation efforts described by KCS in Supplemental Creation Plan) Wetland Creation Area #4 Performance Standard 1. Wetland conditions exist 2. 80% Vegetation cover and self sustainin 3. Survival rate > 80% Plant heiqht > 50% 4. Ferns > 50% 5. Minimal abnormal growth 6. Wetland acreage requirements met Comments and Recommendations Yes, at least in part Yes Yes Yes Yes Unclear It is unclear at this point in time if provision of Spring 2000 Heritage Wc,_Js August 22"d, 1999 Page 6 of 14 additional water has enabled the entire area to achieve a wetland hydrologic regime. Future monitoring should clarify the condition. The east end of the level spreader pipe has been cutoff. This should be repaired. Wetland Creation Area #10 Construct additional wetland area adjacent to the large "natural" pond Performance Standard 1. Wetland conditions exist Yes 2. 80% Vegetation cover and self sustaining Yes, self-sustaining 3. Survival rate > 80% Plant height > 50% 4. Ferns > 50% 5. Minimal abnormal growth 6. Wetland acreage requirements met Comments and Recommendations Performance Standard 1. Wetland conditions exist 2. 80% V Wetland 'D" n cover and self sustaining 3. Survival rate > 80% Plant height > 50% 4. Ferns > 50% 5. Minimal abnormal vegetative cover increasing Yes N/A Yes Yes Control trash deposition and undesirable invasive volunteers. Yes, in part Yes Yes Yes growth Yes Spring 2000 Heritage WLJs August 22nd, 1999 Page 7 of 14 6. Wetland acreage requirements met Comments and Recommendations Yes It is unclear at this point in time if provision of additional water has enabled the entire area to achieve a wetland hydrologic regime. Future monitoring should clarify the condition. I suggest installing some salmonberry plants in the 'lower" (elevation) portion of Wetland "D". Progress Table (Spring 2000 Monitoring) Target Actual Mitigation Area ID and square square Meeting Recommended whether Phase I or II footage footage goals? Actions of area of area i Phase I Wetland Creation Area #1 2,700 0 No Shortfall Phase I incorporated into Phase II Phase I DEA - "A" Phase 1 3,525 1,335 Yes Shortfall incorporated into Phase II Phase I Wetland Creation Area #5 3,000 1,138 Yes Shortfall Phase I incorporated into 1_ Phase II Phase I Wetland Creation Area #7 1,475 820 Yes Shortfall Phase I incorporated into Phase II Phase I Wetland Creation Area #8 4,375 7,908 Yes None Phase I Phase I Buffer Enhancement Area 2,610 2,610 No Replace and #1 Phase I water dead plants Phase I Buffer Enhancement Area 2,500 2,500 No Replace and #2 Phase I water dead plants Number of required monitoring events i remainina N/A 5 5 5 5 5 'i Spring 2000 Heritage Wuds August 22"d, 1999 Page 8 of 14 Phase 1 Buffer Enhancement Area 11,800 11,800 Yes None #3 Phase I Phase I Buffer Enhancement Area 9,900 9,900 Yes Water firs. #4 Phase I Control undesirable i invasives Phase I rBffer Enhancement Area 1,100 1,100 Yes None haseI Phase I Detention Pond Buffer 24,000 24,000 Yes Water firs i.. Phase I 5 G� 5 I Phase II Wetland Creation Area #4 7,750 7750 In part Repair east end Phase II of level spreader 6 pipe Phase II Wetland Area Adjacent to 3,900 1 3,900 + Yes Control "Natural" pond undesirable 6 invasives Phase II Wetland "D" 5,369 6,369 Yes Install 6 salmonberry K C (Gary Kucinski) Novo (5, Owr4lvT%ON i I _ /MONO I 85 RAFT ISLAND / GIG HARBOR, WA 98335-5918 Phone (253) 474-6488 Fax (253) 474-0153 S�Rllf �-u I r'�77-' y4T�lR9L MONO Spring 2000 Heritage Wujds August 22nd, 1999 Page 9 of 14 Spring 2000 Monitoring Wetland Construction Areas DEA m "A" & #5 (Phase 1) Wetland Construction Area #7 (Phase 1) Jr- "'AIR Jv ._.,7r-. •.. t `1ikL _..^� �L�• 1. ti � I 7 Spring 2000 Heritage V1 Js August 22nd, 1999 Page 12 of 14 Buffer Enhancement Area #4 (Phase s �O Buffer Enhancement Area #5 (Phase 1) M-1 wn f • � y�� .�, •. �f .• � 'f. '� (q� y—,l err 'S Y _ x• f ': ..... ..... ..... Spring 2000 Heritage W,--ds August 22nd, 1999 Page 14 of 14 Wetland Construction Area Adjacent to Pond (Phase II) Wetland "D" Hydrology (Phase II) A D o L F s o W 5 July 2000 Environmental So(tgonS Mr. Jim Harris City of Federal Way 33530 First Way South Federal Way, Washington 98003-6210 RE: Heritage Woods 1999 Mitigation Monitoring Review (AAI Task 20024-79C), Federal Way, Washington Dear R.M. Adolfson Associates, Inc. (Adolfson) has reviewed the letter prepared by Gary Kucinski of Kucinski Consulting Services (KCS) and addressed to Dennis Alfredson of Schneider Homes, Inc. regarding the Heritage Woods site, located in Federal Way, Washington. The intent of the letter was to address recommendations made by the City and Adolfson regarding the monitoring efforts at the Heritage Woods site. The recommendations made by the City and Adolfson included completion of an as -built set of plan drawings for the site, and preparation of a monitoring table that would be completed at the end of each monitoring period. Additionally, the City requested that Schneider Homes' response to the City's comments be presented in the form of a draft Spring 2000 Monitoring report. In general, the KCS letter satisfies the requirements described in the 11 April Adolfson letter and the 21 April City of Federal Way letter. The one exception is that the Schneider Homes response was not submitted in the form of a draft Spring 2000 Monitoring Report, as requested by the City. However, as long as the Spring 2000 Monitoring report is submitted soon, using the formats described in the April 2000 Adolfson letter and the more recent letter from KCS to Schneider Homes, this requirement have been satisfied as well. With regard to the as -built drawings, the KCS letter states that KCS expects Schneider Homes to provide these drawings. I would like to add here that it will be necessary for KCS to review the as -built drawings and to make sure that the baseline conditions being documented by them meet the requirements set out in the January 1999 Supplementai Wetiand Creation Plan. Please call me at (206) 789-9658 if you have questions. Again, thank -you for providing us with the opportunity to work on this project. Sincerely, Adolfson Associates, Inc. Lizzie Zemke Senior Ecologist AMARRRI Inl RECEIVED BY Il V nnirl rohRt�IT r)PPAPr"V!K1T J U L 7 2000 ADOLFSON ASSOCIATES, INC. 5309 Shilshole Avenue NW, Suite 200 Seattle, WA 98107 7� 206 789 9658 1— 206 789 9684 ado on�iado orv.�om L zP,,,# k.< e ., Kucinski Consulting Services Gig Harbor, WA Gary Kucinski, Principal Project Planning ■ Environmental Analysis a Wetlands Delineation ■ Permits & Licenses 2901 South 40th Street • (253) 474-6488 ® Tacoma, WA 98409 . Fax (253) 474-0153 GOMMUNI YDEVELL0PJ RECEIVED PARTMENT June 61h, 2000 Schneider Homes, Inc. 6510 Southcenter Boulevard, Suite #1 Tukwila, Washington 98188 TO: Mr. Dennis Alfredson, P.E. Manager of Development and Construction SUBJECT: Heritage Woods II Wetland Monitoring City of Federal Way File Number SUB 98-0003 (98-102890-000-00-SU) Dear Mr. Alfredson: J O N 0 8 2000 Adolfson Associates, Inc. (Adolfson), wetland consultant to the City of Federal Way (City), included several recommendations in their letter to Mr. Jim Harris dated April 11th, 2000. One of their recommendations suggested that the City receive a draft monitoring approach from Schneider Homes. The City could review this draft approach, make any necessary recommendations or changes and thus be assured that a workable approach is in place. MONITORING APPROACH My philosophy with regard to monitoring is to keep things simple and to keep reports short and concise. I suggest that evaluations be made based upon observations taken at a representative sample point within each Wetland Creation Area and Buffer Enhancement Area. The observations will be measured against the performance standards contained within the Supplemental Wetland Creation Plan, dated January 1999. An example of the proposed format is presented below. Schneider Homes, Inc. June 6th, 2000 Page 2 of 3 Wetland Creation Area #4 Performance Standard Comments 1. Wetland conditions exist? 2. Vegetation cover % and self sustaining? 3.a. Plant survival rate > 80%? 3.b. 50% or > height increase? 4. 50% or > fern cover and production? 5. Abnormal plant growth? 6. Acreage requirements met? Comments and Recommendations One photograph will be taken at each representative sample point. In addition, as suggested by Adolfson, a Progress Table will be included with each monitoring report. The format of the table will be similar to that recommended by Adolfson in their letter dated April 11th, 2000. Information to be included will probably consist of: • Proposed square footage of wetland creation area or buffer. ■ Actual square footage of wetland creation area or buffer. • Whether or not the area is meeting goals. • Recommended actions for each area. • Where the area is in the schedule of monitoring events. Schneider Homes, Inc. June 6th, 2000 Page 3 of 3 OTHER ITEMS It is my understanding that you will be providing the "as built" drawing. Item Number 1 of Aldolfson's April 11 th, 2000 letter discusses this drawing and the information to be supplied therein. Since all subsequent monitoring reports will be compared against the "as built" drawing, it is essential that the drawing be complete and accurate. It appears that we are getting close to establishing a consistent reporting process that will supply useful information from which conclusions can be drawn regarding the degree of success of the mitigation site. I look forward to your response and that of the City and Adolfson regarding our proposed monitoring approach. Sincerely, G ry S. Kuci Principal i:jam/2000/reports/schneider #1 - 6 Jun 00 CITY OFrjr.- 33530 1 ST WAY SOUTH Mr. Dennis Alfredson Schneider Homes Inc. 6510 Southcenter Blvd, Suite #1 Tukwila, WA 98188 Dear Mr. Alfredson: (253) 661-4000 FEDERAL WAY, WA 98003-6210 April 21, 2000 Re: Heritage Woods Wetland Monitoring, File No. SUB98-0003 (98-102890-000-00-SU) The city's wetland consultant has completed a review of your Autumn 1999 Wetland Monitoring Report for Heritage Woods, and the January 2000 document by Kucinski Consulting Services titled, A Revisit to Wetland D at Heritage Woods. March 27, 2000, and April 11, 2000, letters from the city's wetland consultant, Adolphson Associates Inc. (AAI), are enclosed for your review. The following is in response to your most recent submittals. First, the document titled A Revisit to Wetland D, has not provided evidence to convince the city and our consultant that the original 1992 wetland boundary delineation of wetland D was in error. Therefore, no change or adjustment to the required wetland creation area will be made. Second, if impacts have, or will, occur to wetland D resulting from the plat construction and/or wetland mitigation work then impacted areas must be mitigated and the area restored to its pre-existing condition. Monitoring of this area must be conducted in future monitoring reports to determine the extent of impacts and failure of this wetland area and what form of mitigation is required. The city's consultant work reviewing your proposal to re-evaluate wetland D was authorized in your October 1, 1999, and July 30, 1999, letters. The city did not require a deposit for this unanticipated consultant review last fall; however, my September 15, 1999, letter and your October 1, 1999,-letter agreed to authorize AAI's work that Schneider Homes would fund. Therefore, please provide a check for $852.00 for the wetland D review. The wetland monitoring review is discussed in the enclosed April 11, 2000, AAI review. In summary, the monitoring report requires significant revisions in order to fulfill the standards outlined in the approved January 22, 1999, Kucinski Consulting Services' Supplemental Wetland Creation Plan. Please review. the April 11, 2000, AAI review and provide an appropriate response to the review comments. Your response should be provided in the format of a draft spring 2000 monitoring report as requested in AAI's review. Please contact me at (253) 661-4019 if you have any questions. Sincerely, .�U/V111 anris Senior Planner enclosures c: Lizzie Zemke, AAI LACSDC\D0CS\SAVE125567741 DOC 11 April 2000 Emironmead Solo ions Mr. Jim Harris City of Federal Way Department of Community Development Services 33530 First Way South Federal Way, Washington 98003-6210 RE: REVIEW OF HERITAGE WOODS FALL 1999 MONITORING REPORT Dear Mr. Harris: Adolfson Associates, Inc. (Adolfson) has reviewed the Autumn 1999 Monitoring Report for the Heritage Woods Wetland Mitigation site, prepared by Kuczinski Consulting Services (KCS Inc.). The Heritage Woods site is located on Military Road, in Federal Way, Washington. Based upon our review of the information provided in the KCS report and what we already know about the site, the report is inadequate to meet the City's monitoring report "requirements. While the information presented in the report is useful, a more detailed analysis of conditions on the site is necessary to determine whether or not the project goals are being met. In order to assure that future submittals meet the City's needs and provide the information necessary to draw conclusions, regarding the degree of success of the mitigation site, Adolfson has several recommendations. Our recommendations fall into four general areas and will be presented in such terms below: 1) As -Built Drawing An as -built drawing must be prepared and submitted. This drawing must show the final grades (elevations), planting locations, and numbers of individual plants that were actually installed. All subsequent monitoring information will be compared against this "as -built" drawing. Additionally, this new drawing must also show the location and extent of the Lakehaven Utility District's sewer line easement within the mitigation project area, and the location of any pipes currently located within that easement. The as - built report and map was an element of the KCS 1/22/99 supplemental plan approved by the City. KCS should review the 1/22/99 plan and include all proposed elements in the as -built report and future monitoring reports. 2) Progress Table Because this project has been complicated by separate but parallel monitoring schedules and different phases of mitigation implementation, we are requesting that Schneider Homes prepare a table that clearly shows the monitoring schedule and summarizes the RFCEIVED BY results of each of the subsequent monitoring events. This table will need to be-11pdated ;T r)=oepTV APR 12 2000 ADOLFSON ASSOCIATES, INC. 5309 Shilshole Avenue NW, Suite 200 Seattle, WA 98107 'TW 206 789 9658 1., 206 789 9684 adoykonga,4 (fo*.Corn OR Heritage Woods letter 11 April 2000 Page 2 of 4 and submitted following each monitoring event, and will serve as a guide for both the Schneider Homes consultant and the City. For each mitigation wetland or buffer area, the table should include: proposed square footage of wetland creation area or buffer, actual square footage of wetland creation area or buffer, whether or not the area is meeting goals, recommended actions for each area, and where the area is in the schedule of monitoring events. An example table is included with this letter. Please note that because no usable monitoring information was submitted for any of the mitigation sites in 1999, the previously established monitoring schedule has been modified. The new schedule, which should be used when completing the requested table, is as follows: Updated Schedule for Required Monitoring Events at Heritage Woods Monitoring Year Spring Fall 2000 Phase I & II* Phase I & II 2001 Phase I & II Phase I & II 2002 Phase I & II 2003 Phase I & II 2004 Phase II *Phase I refers to mitigation efforts described in initial mitigation plans prepared by Del Moral and Associates. Phase II refers to mitigation efforts described in the Supplemental Creation Plan prepared by KCS in 1999. 3) Monitoring Report Contents Monitoring programs typically involve measurement or assessment of mitigation site elements that are directly linked to one or more of the stated performance standards. The Supplemental Creation Plan prepared by Kuczinski, dated 1999, lists 6 performance standards, including that the wetland creation areas will develop wetland characteristics, and that vegetation will be self-sustaining and cover at least 80% of the planted area. Note that the six performance standards are listed on page 7 of the Supplemental Wetland Creation Plan for the Plat of Heritage Woods (Revised January 1999) prepared by KCS, and submitted to the City of Federal Way. Schneider Homes, Inc., or the monitoring biologist, needs to measure and assess the degree to which each of the stated performance standards is being met each time the sites are monitored. Schneider Homes is responsible for developing an approach for measuring these stated performance standards, and then that same approach needs to be followed and reported in a consistent manner until the end of the five-year monitoring period. Adolfson recommends that the City receive a draft monitoring approach from Schneider Homes before the next monitoring event (Spring 2000) is initiated. The City can then review the draft approach, make any necessary recommendations or changes and be assured that a workable approach is in place before any monitoring commences: Heritage Woods letter 11 April2000 Page 3 of 4 4) Lakehaven Utility District Issues It is our understanding that at least a portion of Wetland Creation Area 100 lies within a sewer line easement held by the Lakehaven Utility District. It is also our understanding that Schneider Homes, Inc. is currently pursuing an agreement with Lakehaven to address various issues including an agreement regarding responsibility for future management and maintenance of the created wetland area. Our main concern with regard to the Lakehaven easement issue is that the long-term responsibility for restoring and maintaining the wetland in the event that the area becomes disturbed or altered as a result of work, maintenance, or repair within the easement is currently undetermined. It appears that either Lakehaven or Schneider Homes would need to submit a maintenance plan for City approval in order to conduct any future maintenance work within the mitigation area that lies within the easement. It is the responsibility of Schneider Homes to pursue the necessary agreements with the City and/or Lakehaven, as quickly as possible. We very much appreciate the opportunity to assist the City with this project. Please feel free to call Andy Castelle or me at (206) 789-9658 if you have questions about this. Sincerely, ADOLFSON ASSOCIATES, INC. t� Lizzie e Senior Ecologist Heritage Woods letter 11 April 2000 Page 4 of 4 Sample Progress Table Mitigation Target Actual Meetin- Recommended Number of Area ID square square g Actions required and footage of footage of Goals? monitoring whether, area area events Phase I or remaining II Created 6 as of wetland area April 2000 #1 Phase I Created 7 as of wetland area,' April 2000 #2 Phase II Created wetland area #3 *According to most recent monitoring schedule modified April 2000 27 March 2000 Environmental Solugo" Mr. Jim Harris City of Federal Way Department of Community Development Services 33530 First Way South Federal Way, Washington 98003-6210 RE: REVIEW OF REVISIT TO WETLAND "D" AT HERITAGE WOODS Dear Mr. Harris: RECEIVFli By MAR 2 9 2000 Adolfson Associates, Inc. (Adolfson) is submitting this letter to document costs incurred while addressing questions raised by Dennis Alfredson of Schneider Homes, Inc. regarding the Heritage Woods site located in the City of Federal Way, Washington. As you know, Adolfson was requested to visit the Heritage Woods site in September 1999 to discuss the wetland status of the area referred to as Wetland D. At the on -site meeting in September 1999 it was agreed that Adolfson would review a subsequent report to be prepared by Gary Kuczinski of KCS, Inc. outlining why wetland D should not be considered a regulated wetland by the City of Federal Way. Adolfson has spent a total of $852 to complete this review. Our work has included preparing for the site meeting (reviewing the file, phone conversations), attending the meeting, several discussions with the City, reviewing the KCS report, discussing how to proceed given the contents of the letter report, and preparing this letter. We have not prepared a letter documenting our findings, however it is our opinion that based upon what we know about the site and the information presented in the KCS letter report, the Wetland D boundary should not be adjusted. It has been our understanding that this "revisit to Wetland "D" task would be separate from the existing tasks established for the purpose of reviewing the monitoring reports for the Heritage Woods wetland mitigation project. We very much appreciate the opportunity to assist the City with this project. Please feel free to call Andy Castello or me at (206) 789-9658 if you II -lave questions about this. Sincerely, ADOLFSON ASSOCIATES, INC. �W_r � Lizzie Zemke Senior Ecologist ADOLFSON ASSOCIATES, INC. 5309 Shilshole Avenue NW, Suite 200 Seattle, WA 98107 'T4 206 789 9658 1— 206 789 9684 ad,Ymmgadof ow.(orn CITY OFfG (253) 661-0 33530 1ST WAY SOUTH FEDERAL WAY, WA 98003-6216210 Ms. Lizzie Zemke February 17, 2000 Adolphson Associates 5309 Shilshole NW Seattle, WA 98107 s ire Dear Ms. Zemke: Re: Heritage Woods Wetland Monitoring — Autumn 2000 & Revisit to Wetland "D" Enclosed is a copy of the Autumn 1999 Heritage Woods wetland monitoring by Kucinski Consulting Services Inc. Your firm will continue to review the monitoring reports for the Heritage Woods project, as we have contracted. The Autumn 1999 monitoring report is considered the fourth monitoring event for the project. The enclosed wetland consultant authorization form provides $675.00 for the 1999 monitoring (there was no spring 1999 monitoring). In addition, per the enclosed February 1, 1999, letter from Lizzie Zemke to Jim Harris, there is an additional $1,005.00 for 1999 monitoring of phase II wetlands (due to the earlier deficiencies in the wetland creation program). Therefore, there is a total budget for this monitoring event not, to exceed $1,680.00. Also enclosed is a document titled, "A revisit to wetland D Heritage Woods," received by the City of Federal Way January 28, 2000. The revisit to wetland D is the applicant's response to my September 15, 1999, letter to Dennis Alfredson of Schneider Homes (copy enclosed). You were involved with the wetland D issue during the summer/fall of 1999. As outlined in my September 15, 1999 letter, Schneider Homes is required to fund the review of revisit to wetland D and this cost was not anticipated in the phase 1 or 2 monitoring budgets. Therefore, please provide a separate cost estimate for review of the revisit to Wetland D component, prior to conducting the review of this item. For your information, I have also enclosed a December 30, 1999, letter from Lakehaven Utility District regarding the wetland expansion area. First provide a written cost estimate for review of the revisit to wetland D. Second, provide a written review of the Autumn 1999 wetland monitoring report. I anticipate receiving your review of the monitoring report by approximately March 6, 2000. Please contact me at 253 661-4109 if you have any questions. Sincerely, �Harris Senior Planner Enc: Revisit to Wetland "D" at Heritage Woods, by Kucinski Consulting Services, received by the City of Federal Way January 28, 2000 Autumn 1999 Wetland Monitoring Report Heritage Woods by Kucinski Consulting Services Inc., December 30, 1999 Signed Task Authorization 9727-79C ($675.00) (1999 Monitoring Task Authorization) February 1, 1999, AAI Letter to Jim Harris, AAI Task 97103-81 (Re: Phase 2 Monitoring) September 15, 1999, Jim Harris Letter to Dennis Alfredson December 30, 1999, Lakehaven Utility District Letter to Dennis Alfredson L:\CS MOCSISAV068581753.DOC DATE WETLAND CONSULTANT AUTHORIZATION FORM 4 September 1997 CITY City of Federal Way 33530 First Way South Federal Way, Washington 98003 CONSULTANT Adolfson Associates, Inc. 5309 Shilshole Avenue NW Seattle, WA 98107 PROJECT Heritage Woods Mitigation Monitoring Review PROJECT APPLICANT Parklane Ventures, Inc. TASK AUTHORIZATION No. 9727-79C CITY PLANNER Tim Harris TASK SCOPE (1) Review wetland mitigation sites and monitoring report for one monitoring event in 1999. Monitoring report to be prepared by applicant's consultant. (2) Prepare letter report of findings (10 hr. Staff scientist, 1 hr. Senior review, $610). (4) Reimbursable (mileage, photography, clerical, etc.): $65.00. TASK SCHEDULE All work to be completed and report submitted to City staff within two weeks of receipt of signed authorization to proceed. - TASK COST Not to exceed $675.00 without written amendment to this Task Authorization. DELIVERABLES Letter report ACCEPTANCE 0 `l late p GI Date.�f1�]'�'i�3!] By Kucinski COMMUNITY DEVE oPM14T RARTrAENT Consulting a Project Planning JAIL 2 8 2000 Environmental Analysis Wetlands Delineation Services y Permits & Licenses Gig Harbor, WA Gary Kucinski, Principal " 2901 South 401h Street (253) 474-6488 Tacoma, WA 98409 Fax (253) 474-0153 A revisit to Wetland "D" at Heritage Woods Division II Introduction The Heritage Woods Development is currently owned by Schneider Homes, Inc. Schneider Homes is completing construction of all houses and has also assumed responsibility for the successful installation of all required improvements such as streets, sidewalks, utilities and wetland impact mitigation features. It is our understanding that the original developer of the Heritage Woods project was Parklane Ventures. The consulting firm of David Evans and Associates was hired (presumably by Parklane Ventures) to delineate wetlands on the site. We believe that this original delineation occurred in 1992. 1 have not seen a copy of the delineation report. During the process of developing the property, some wetland areas were adversely impacted. To compensate for these wetland impacts, the consulting firm of del Moral and Associates was retained to prepare a wetland mitigation plan. Del Moral and Associates was also hired to perform initial monitoring of the mitigation work. The information made available to us with regard to Wetland "D" is not detailed. We understand that it occurred in two topographic depressions and that there was a connection from the wetland to the large, open water storm detention pond located on the property. Prevalent vegetation included red cedar, salmonberry and red alder. It appears that approximately 218 square feet of Wetland "D" was permanently impacted (filled) and another 871 square feet were temporarily impacted. Mitigation (i.e., compensation) was to consist of enhancing 870 square feet of a disturbed portion of Wetland "D" and creating 436 square feet of new wetland. Kucinski Consulting Services (KCS), Gary Kucinski, was requested to assume monitoring of the mitigation features in the fall of 1998. Our first report was submitted in October of that year. As a result of that report, KCS was asked to prepare a "Supplemental Wetland Creation Plan" to correct some of the shortcomings of the original mitigation work. As part of the mitigation planning process, I suggested that "a portion of what is shown on the original 'Wetland Mitigation Plan' as Wetland "D" is not now, nor does it appear to ever have been, wetland. " Reason for Revisiting Wetland "D" In a letter dated July 301h, 1999 from Dennis Alfredson, P.E., Manager of Development and Construction for Schneider Homes to Jim Harris, Senior Planner for the City of Federal Way, Mr. Alfredson states his concern. The concern is that at the end of the required five year monitoring period, Schneider Homes will be unable to demonstrate that it has successfully created the total amount of wetland to match the required square footage as called for in the original Wetland Mitigation Plan. If, however, there was an error in mapping Wetland "D" and consequently an error in calculating the area of wetland impact, then the amount of wetland square footage required to be created should be reduced by the mapping error. If this sounds confusing, then let me try to explain it another way. Wetland "D" apparently was originally mapped as containing 9,583 square feet. Calculations showed that 218 square feet of the wetland would be permanently impacted (filled) and another 871 square feet would be temporarily impacted (assumed reversible impacts). The Final Wetland Mitigation Plan (del Moral and Associates, 1995) indicated that 436 square feet of wetland (2.1 ratio), i.e., 2 x 218 = 436 would need to be created in order to compensate for the 218 square feet of wetland permanently impacted. The temporary impacts would be compensated for by enhancing a degraded portion of Wetland "D". If we assume that Wetland "D" was mapped partially in error, then perhaps the permanently impacted portion of Wetland "D" was much smaller than 218 square feet. If so, then the required area of wetland creation (436 square feet) would also be smaller. As a partial aside to the foregoing, one of the goals of the Supplemental Wetland Creation Plan (KCS, 1998) is to "restore hydrology to the pre-existing Wetland "D" so that it once again functions as a wetland. " Although this goal does not affect the calculation of required wetland creation, it nevertheless would be frustrating to attempt to restore hydrology to those parts of Wetland "D" which were never wetlands in the beginning. Results and Discussion At the request of Dennis Alfredson, (see his memorandum to Jim Harris dated September 10th, 1999), KCS delineated the boundary of Wetland "D" as that wetland was thought to have existed in 1992 when David Evans and Associates performed their original delineation. The results of that effort are shown on the enclosed drawing. Our delineation was performed in compliance with the methodology and procedures specified in the Washington State Wetlands Identification and Delineation Manual (Washington State Department of Ecology Publication #96-94, March 1997). The Washington State Manual is a revised version of the Department of Army, Corps of Engineers Wetland Delineation Manual, Technical Report Y-87-1 (the 1987 Manual). The 1987 Manual is the standard wetland delineation manual used by federal agencies. These referenced manuals set forth methodology wherein wetlands are determined by the presence of hydrophytic vegetation, hydric soils and wetland hydrology (the multi -parameter) methodology). Our field work was accomplished on September 30th, 1999. The attached data sheets describe our findings. Sample points were established at seven locations in order to identify the perimeter of Wetland "D". The wetland appears to have occurred in two small topographic depressions that were connected through surface hydrology by a narrow corridor. The information supplied by David Evans and Associates indicates that the wetland has a hydraulic connection to the primary storm water pond located downstream of Wetland "D". This was not clearly evident to me. However, I have continued to show the connection based primarily on visual observation of topography. Wetland "D", as "recreated" by me, is substantially smaller than the area originally mapped as wetland. This appears to be the case primarily because I believe that the linear connection between the two topographic depressions is narrower than the original mapped wetland. Wetland "D" Calculated size per 1992 David Evans and Associates Delineation - 9,583 square feet. Calculated size per 1999 KCS "Re-creation" of 1992 delineation - 5,369 square feet. Based on the re-creation of the 1992 delineation, it appears that the size of Wetland "D" was calculated larger than the actual wetland boundaries would dictate. It is my understanding that the City of Federal Way will request that their wetland consultant, Adolfson Associates, Inc. review this report and provide comments with regard to agreement or disagreement with my findings. Adjustment to wetland impact calculations and wetland creation requirements (if any) can then be made. Please refer to the enclosed drawing and the attached data sheets for detailed information regarding our findings. DATA FORM 1 (Revised) Routine Mletland Determination (WA State Wetland Delineation Manual or 1987 Corps Wetland Delineation Manual) Project/Site:Date: Applicant/owner:��fitl lQ /,�- County: %�i►i State: G[J•�GJ` Investigator(s): 611� cr„JS/� SITIR: Do Normal Circumstances exist on the site? Y no Community ID: Is the site significantly disturbed (atypical situation)? es Transect ID: Is the area a potential Problem Area? ye n Plot ID: Explanation of atypical or problem area: VEGETATION (For strata, indicate T = tree; S = shrub; H = herb; V = vin Dominant Plant Species Stratum 9c cover Indicator Dominant Plant Species Stratum % cover Indicator Ld � � C "" � f � 1✓ l G �f` N rZ HYDRUPHYTIC VEGETATION INDICATORS: % of dominants OBL, FACW, & FAC / = z Check all indicators that apply & explain below: Visual observation of plant species growing in PhysiologicaUreproductive adaptations areas of prolonged inundation/saturation Wetland plant database Morphological adaptations Personal knowledge of regional plant communities Technical Literature Other [ex lain) Hydrophytic vegetation present? yes no Rationale for decision/Remarks: �.�� ��%/� � _0 c�C,.�r�.•f,� � fy�',�/may ���s~.�9..ac� . A� Is it the growing season? }es no Water Marks: yes na on Based on: soil temp (record temp' ) Drift Lines: yes nc v-1'- other (ex (explain) Dept. of inundation: inches Oxidized Root (live roots Channels <12 1n. es ni Depth to free water in pit: inches ��� FAC I�Teutral: yes Depth to saturated soil: inches Check all that apply & explain below: Other (explain): Stream, Lake or gage data: Aerial photographs: Other: — Wetland hydrology present? yes Rationale for decision/Remarks: �e —fie t drgry 'Pe— �9r.•� Sediment Deposits: yes 6a Drainage Patterns: ye no Local Soil Survey: yes no Water -stained Leaves ye no SOILS S/e:70'— Map Unit Name �y�crp (Series & Phase) Taxonomy (su c Profile Description Depth Horizon Matrix color Rlottle co: (inches) (Munsell (lvlunsell moist) moist) �`is� I g X6 1 r 6 �V'WZ/, A,47 Drainage Class Field observations confirm Yes 65, mapped type? ors Mottle abundance I Texture, concretions, size & contrast structure, etc. �f%✓!i a r�i�ic sow/ i Drawing of soil profile match descri tion riyanc soil icators: (check all that apply) Histosol Matrix chroma < 2 with mottles Histic Epipedon Mg or Fe Concretions VSulfidic Odor High Organic Content in Surface Layer of Sandy Soils Aquic Moisture Regime Organic Streaking in Sandy Soils educing Conditions Listed on National/Local Hydric Soils List Gleyed orLow-Chr a (=I) matrix Other (explain in remarks) Hydric soils present? } no _ Rationale for decision/Remarks:��,q„r�G �av rvArCsrrcr.�.s �/�c.'�rc� tea.- rr�r�•�� .y�gr�r Wetland Determination (circle) Hydrophytic vegetation present? %e no Hydric soils present? no Is the sampling point !TYetland hydrology resent? }°e no within a wetland? Rationale/Remarks: NOTES: yes no Revised 4/97 DATA FORM f (Revised) Routzne Wetland Determination (WA State Wetland Delineation Manual or 1987 Corps Wetland Delineation Manuall Project/Site: ��W1i9«4S Applicant/owner:�ifrtf�/,pC=�� ��E�- �,,,lG Invesdeator(s): Do Normal Circumstances exist on the site? ? Is the site significantly disturbed (atypical situation)? es Is the area a potential Problem Area? }e Explanation of at ical or to no em area. s 44o- - �viii VEGET MON (For strata, indicate T = tree; S = shrub; H =herb;V Dominant Plant Species Stratum -7c coy er Indicator Dominant Plant _t u Date: County: �'ItA �i 7 State: G�� S/T/R: Community ID: TransectID: Plot ID: —� _ es Stratum is cover I Indicator HYDROPHYTIC VEGETATION INDICATOR�S: % of dominants OBL, FACW, & FAC Check all indicators that apply & explain below: Visual observation of plant species growing in Physiolooical/reproductive adaptations zreas of prolonged inundation/saturation Wetland plant database Morphological adaptations Personal knowledge of regional plant communities Technical Literature Other (explain) Hydrophytic vegetation present? yes no Rationale for decision/Remarks: J �D�LSc�id„J HYDROLOGY Is it the growing season? }es no Water darks: yes Based on: soil temp (record temp.) on Drift Lines: yes other (explain) Lo�.rp Dept. of inundation: inc?!es Oxidized Root (live r Depth to free water in pit: ih/�/0 !� /moo Channels <12 in, es nces Depth to saturated soil: inches FAC Neutral: yes, Check all that apply & explain below: Other (explain): Stream, Lake or gage data: Aerial hotosra hs: Other: Wetland hydrology present? yes no Rationale for decision/Remarks: Sediment Deposits: } Drainage Patterns: y Local Soil Survey: y Water -stained Leaves SOILS Map Unit Name (Series & Phase) Taxonomv (su Profile Description Depth Horizon (inches) SIB —/ Matrix color Mottle colors Mottle abundance (Munsell (Munsell size & contrast m)ist) moist) Drainage Class -GI JZ2 Field observations confirm es No mapped type? Texture, concretions, structure, etc. s X� Z/ Drawing of soil profile match description) Hydric Soil Indicators: (check all that apply) Histosol ✓Matrix chroma < 2 with mottles Histic Epipedon Mg or Fe Concretions Sulfidic Odor High Organic Content in Surface Layer of Sandy Soils Aquic Moisture Regime Organic Streaking in Sandy Soils Reducing Conditions Listed on National/Local Hydric Soils List Gleyed or Low-Chroma (=1 atrix Other (explain in remarks) Hydric soils present? yes no Rationale for decision/Remarks: Wetland Determination (circle) Hydrophytic vegetation present? yes n Hydric soils present? yes n Is the sampling point Wetland hydrology resent? yes n within a wetland? yes Rationale/Remarks: NOTES: 1 Revised 4/97 DATA FORM I (Revised) ^) Routine Wetland Determination (WA State Wetland Delineation Manual or 1987 Co s Wetland Delineation' Mn;,,,an { Project/Site:�f�« SOS Applicant/owner:�ifit��rp��� ZnVeStlaator(5}: L7FjT/""7 Do Normal Cireumstances exist on the site? ye Is the site signin`cantly disturbed (atypical situation)? Yes Is the area a aotential Problem Area? }e Ex lanation of at ,oical or roblem area: Qjs VEGETATION (For strata, indicate T = tree; S = shrub; H = Dominant Plant Species Stratum c, cover Indicator - aea I �kv-jl HYDROPHYTIC VEGETATION INDICATORS % of dominants OBL, FACW, &FAC heck all indicators that apply & explain below: Visual observation of plant species growing in areas of prolonged inundation/saturation Morphological adaptations Technical Literature Hydrophytic vegetation present? yes Rationale for decision/Remarks: HYDROLOGY Is it the growing season? }� no Based on: soil temp (record temp' ) other (ex (explain) Dept. of inundation: inches Q Depth to free water in pit: inches Depth to saturated soil- inches Check all that apply & explain below: Stream, Lake or gage data: Aerial hotaCra hs: Other: Wetland hydrology present? yes Rationale for decision/Remarks: Date: County: State:•f S/T/R: no Community ID: TransectID: _ n Plot ID: V Dominant Plant S ecies Stratum % cover I Indicator Physiolo?icallreproductive adaptations Wetland plant database Personal knowledge of regional plant communities Other (exolain) NVater Marks: yes on Drift Lines: yes Oxidized Root (live roo Channels <12 in. yes FAC Neutral: yes Other (explain): Sediment Deposits: Drainage Patterns: yes i Local Soil Survey: yes Water -stained Leaves yeSr no SOILS Map Unit Name %�Gr•Cr�c{r. (Series & Phase) T Drainage Class �LyGt/0 Field observations confirm Yes mapped type? Profile Description Depth (inches) Horizon Matrix color (Munsell moist) Mottle colors (Munsell moist) Mottle abundance size & contrast Texture, concretions, structure, etc. Drawing of soil profile (match description) �O •�lR5 T 1 Hydric Soil dicators: (check all that apply) Histosol Matrix chroma _< 2 with mottles Histic Epipedon Mg or Fe Concretions Sulfidic Odor High Organic Content in Surface Layer of Sandy Soils Aquic Moisture'Regime Organic Streaking in Sandy Soils LZReducing Conditions Listed on National/Local Hydric Soils List Gleyed or Low-Chr (=1) matrix Other (explain in remarks Hydric soils present? y no Rationale for decision/Remaz 10,AY-. �.� Cl " ® 7�e Lo�� fjfv0 �� r� s�srr Gv�°�19i✓� lde - Wetland Determination (circle) Hydrophytic vegetation present? yes n Hydric soils present? es Is the sampling point yes na Wetland h +drolog resent? les no within a wetland? Rationale/Remarks: NOTES: Revised 4/97 DATA FORM f (Revised) Routine Wetland Determination (WA State Wetland Delineation Manual or 1987 Corps Wetland Delineation M2nt2;11) Project/Site: kDo cant/owner:�, frtJ�l� i srator(s): ormal Circumstances exist on the site?site significantly disturbed (atypical situation)? es Is the area a potential Problem Area? }'es Explanation of at r ical or problem area:u�- YEGETA VION (For strata, indicate T = tree; S = shrub; H = Dominant Plant Species Stratum 9c cover Indicator Date: 1/3��� County: %�X'�lA4 State: STIR: no Communin, ID: TransectlD. n2 Plot ID: .- sa - y V = vin Dominant Plant Species Stratum % cover I Indicator HYDROPHYTIC VEGETATION INDICATORS: l 90 of dominants OBL, FACW, & FAC 4�' Q Check all indicators that apply & explain below: Visual observation of plant species growing in Physiolo-aical/reproductive adaptations areas of prolonged inundation/saturation adaptations Wetland plant database Tech ical L to Technical Literature � Personal knowledge of regional plant communities Hydro vegetation present? Other (ex lain) yes no Rationale for decision/Remarks: HYDkOLOGY Is it the gro;;ing season? }'es - no «'ater Marks: yes no Sediment Deposits: no Based on: soil temp (record temp } Oil Drift Lines: yes too yes Drainage Patterns: other (ex lain] Dept. of inundation: inches yeS no Oxidized Root (live root Channels <12 in, Local Soil Survey: y no es Depth to free water in pit: inc;' ' —ve es Depth to saturated soil: inches FAC Neutral: yes n Water -stained Leaves ye no Check all that apply & explain below: Stream, Lake or gage data: Other (explain): Aerial hotocra hs: Other: Wetland hydrology present? yes Rationale for decision/Remarks: no SOILS sa- y Map Unit Name (Series & Phase) Taxonomy (su Profile Description Drainage Class Field observations confirm Ye No mapped type? Depth (inches) Horizon Matrix color (Munsell moist) Mottle colors (Munsell moist) Mottle abundance size & contrast Texture, concretions, structure, etc. Drawing of soil profile match description) s/.yi �- 7267 i Hydric Soil Indicators: (check all that apply) Histosol Matrix chroma <_ 2 with mottles Histic Epipedon Mg or Fe Concretions Sulfidic Odor High Organic Content in Surface Layer of Sandy Soils Aouic Moisture -Regime nronn;r CtrPnL-; lR ;n cam. 4 , c ;ice Reducing Conditions Gleyed or Low-Chroma (5 Hydric soils present? yes r Rationale for decision/Remarks: Wetland Determination (circle) Listed on National/Local Hydric Soils List Other (explain in remarks) Hydrophytic vegetation present? yes n Hydric soils present? yes n Is the sampling point yes no Wetland hydrology resent? yes within a wetland? - Rationale/Remarks: NOTES: Revised 4/97 DATA FORM I (Revised) Routine Wetland Determination (WA State Wetland Delineation Manual or 1987 Ca s Wetland Delineation �Zanttal} ProjecUSite: �/P/7�9,-7—Z= fps Date: 34 Applicant/owner:�ffitJr�C/��r-„yam County: / InvesState: titrator(s): � �-� / ������ SrfIR- , Do Normal Circumstances exist on the site? y no Community ID: Is the site significantly disturbed (atypical situation)? , es Transect ID: Is the area a potential Problem Area? }e n Plot ID: Explanation of at •oical or VTGETATION (For strata, indicate T = Tice; S = shrub; H = herb; V = vin Dominant Plant S ecies Stratum C7 is corer Indicator Dominant Plant Species Stratum Co cover f Indicator HYDROPHYTIC VEGETATION INDICATORS: i % of dominants OBL, FACW, & FAC Check all indicators that apply & explain below: Visual observation of plant species 0-rowing in PhysiologieaVreproductive adaptations areas of prolonged inundadon/saturation Morphological adaptations Wetland plant database Personal Technical Literature knowledge of regional plant communities Other (explain) Hydrophytic vegetation present? j•es no Rationale for decision/Remarks: HIDROLOGY Is it the growing season? }'es no lWater Marks: yes n Sediment Deposits: es no on Based on: soil temp (record temp' ) Drift Lines: yes no Drainage Patterns: yes no other(explain) lain) rr-Zel-- Dept. of inundation: inches ��es Oxidized Root live roo � ( Local Soil Survey: yes o 1e Channels <12 in, tires no Depth to free vin pit: inchFACN'eutrai; Depth to saturatteded soil: inches yes o Water -stained Leaves yes a Check all that apply & explain below: Stream, Lake or gage data: Other (explain): Aerial hotom hs: (her: Y/ Wetland hydrology present? yesno Rationale for decision/Remarks: - % SOILS Map Unit Name (Series & Phase) Taxonom Profile Description Drainage Class Gt/ Field observations confirm Yes I�To i mapped type? Depth (inches) Horizon Matrix color (Munsell moist) Mottle colors (M- unsell moist) Mottle abundance size & contrast Texture, concretions, structure, etc. Drawing of soil profile (match description i Hydric Soil indicators: (check all that apply) Histosol Matrix chroma <_ 2 with mottles Histic Epipedon Mg or Fe Concretions Sulfidic Odor High Organic Content in Surface Layer of Sandy Soils Aouic Moisture Regime (lraanir ctraolr;-- ;n Qom. 4 , Q-1.. Reducing Conditions Gleyed or Low-Chr a (=1) matrix Hydric soils present? yes no Rationale for decision/Remark . Wetland Determination (circle) Listed on National/Local Hydric Soils List Other (explain in remarks) Hydrophytic vegetation present? es no Hydric soils present? no Is the sampling point Wetland hydrology resent? y no within a wetland? Rationale/Remarks: NOTES: 6�2 no Revised 4/97 DATA FORM f(Revised) Routine Wetland Determination (WA State Wetland Delineation Manual or 1987 Corns Wetland Dpiinaal-inn . ! Project/Site: Applicant/owner:�it��/�y��eS SIG Investiaatar(s): G7. 'o—I / Do Normal Circumstances exist on the site? y Is the site significantly disturbed (atypical situation)? es Is the area a potential Proble;n Area? }e Explanation ofaty ical orprablem area. VEGETATION (For st-rates, indicate no V= Dominant Plant Soecies Stratum 7c cover Indicator Dominant Plant Svecies HYDROPHYTIC VEGETATION INDICATORS: % of dominants OBL, FACW, & FAC Check all indicators that apply & explain below: Visual observation of plant species growing in areas of prolonged inundation)saturation Morphological adaptations Technical Literature Hydroph 'tic vea tat - Date: ��30��g Count}: 1 State: Gr�� ��p� SII-IR: Community ID: TransectID: Plot ID: Stratum % cover f Indicator Physiological/reproductive adaptations Wetland plant database �- Personal knowledge of regional plant communities ✓ Other (explain) } be on present. yes Rationale for decisi on/Remarks: L� P'os; HYDROLOGY Is it the growing season? 9s; no Based on: soil temp (record temp�� other (ex lain Dept. of inundation: inches Depth to free water in pit: inches l `" ��e Depth to saturated soil: inches Check all that apply & explain below: Stream, Lake or gage data: Aerial hoto�rz hiOther: /L' i'Vetland hydrology present? �•eS n I Rationale for decision/Remarks: Water Marks: yes no on t ift Lines: yes no Oxidized Root (live roots Channels <12 1n. es FAC Neutral: 'Iles a l Other (explain): Sediment Deposits: ye Drainage Patterns: yes Local Soil Survey: yes Water-stained Leaves v no SOILS, Map Unit Name (Series & Phase) Taxon Profile Description S�- Drainage Class Field observations confirm Yes No i Depth Horizon Matrix color Mottle colors Mottle abundance Texture, concretions, Drawing of soil (inches) (Munsell (-Munsell size & contrast structure, etc. profile moist) moist) match description -01 4 Hydric Soil Indicators: (check all that apply) Histosol Matrix chroma <_ 2 with mottles Histic Epipedon Mg or Fe Concretions Sulfidic Odor High Organic Content in Surface Layer of Sandy Soils Aauic Moisture--Re.Qime c,,;1� Reducing Conditions Gleyed or Low-Chroma (_ Hydric soils present? yes r Rationale for decision/Remarks: Wetland Determination (circle) Listed on National/Local Hydric Soils List ix Other (explain in remarks) Hydrophytic vegetation present? yes Hydric soils present? yes Is the sampling, point yes no Wetland hydrology resent? yes within a wetland? Rationale/Remarks: �� �� _ �% /�� Z��� NOTES: Revised 4/97 DATA FORM t(Revised) Routine Wetland Determination (WA State Wetland Delineation Manual or 1987 Ca s Wetland Delineation' xfAit,iaT) . Project/Site: Applicant/owner: InvestiIIator(s): � r� % Gr„f�r�� Do Normal Circumstances exist on the site? ? no Is the site significantly disturbed (atypical situation)? es , Is the area a potential Problem Area? 3.e n Explanation of aty 'cal or roblem area: �fs C.«� NTGE�' MOi� (For strata, indicate T = tree; S = shrub; H = herb; V = vi Dominant Plant 5 Date: ':5�o��� County: 'X/V, State: GrJ��el� SMR: Communin, ID: Transe.ct ID: Plot ID: ecFes Stratum 7c cover Indicator Dominant Plant St)ecies Stratum cover Indicator I I I I - - HYDROPHYTIC VEGETATION INDICATORS: goof dominants OBL, FACW, & FAC / 105F Check all indicators that apply & explain below: Visual observation of plant species grov.,ing in PhysiologicaJreproductive adaptations zzeas of prolonged inundation/saturation Wetland plant database Morphological adaptations Personal knowledge of regional plant communities Technical Literature Other (ex lain) Hydrophytic vegetation present? yes no A Rationale for decision/Remarks:` All 4nJ �.� t� !r✓C7lC�$ fs�Y/pGrS riJ����rfr�fc G?�+fyls�arr�- HYDROLOGY Is it the growing season? yes. , no B aced on: soil temp (record tetra ) other (ex lain] ��r�..l�� Dept. of inundation: inches Depth to free water in pit: inches Depth to saturated soil: inches Check all that apply & explain below: Stream. Lake or gage data: Aerial photoqrz hs: Other: Wetland hydrology present? Rationale for decision/Remarks: 3 no N ater Marks: yes Oil Drift Lines: yes Oxidized Root (live r Channels <12 in, des FAC Neutral: yes Other (explain): Sediment Deposits: o yes%now 6;V Drainage Patternsn�'' Local Soil Survey: yes na Water -stained Leaves ve no SOILS. Map Unit Name I Drainage Class (Series & Phase) 5. , Taxonomy (suberou) Field observations confirm Ye No ma ed e? Profile Description Depth Horizon Matrix color (inches) (Munsell Mottle colors (munsell Mottle abundance size & contrast Texture, concretions, Drawing of soil moist) moist) structure; etc. profile match descri Lion �01F,00W 10, wv Hydric Soil Indicators: (check all that apply) Histosol Histic Epipedon Sulfidic Odor Aquic Moisture'Regime Reducing Conditions Gleyed or Low-Chroma (=1) matrix riyanc soils present? Rationale for decision/Remarks Matrix chroma S 2 with mottles Mg or Fe Concretions High Organic Content in Surface Layer of Sandy Soils Organic Streaking in Sandy Soils — isted on National/Local Hydric Soils List _j—,' Other (explain in remarks) yes no Wetland Determination (circle) Hydrophytic vegetation present? ye no Hydric soils present? e no Is the sampling point Wetland hydrology resent9 no within a wetland? Rationale/Remarks: Z�/ yes no . '.1 NOTES: �Ill�l Ica—a..� ' �J� ��i—.��.� 11�fI9•,.� "� r . re•�Ti��i �i��•��%y' cv..��c�� �jPr 7�rr�a ��v�r�,t��t� ��rGSs-r�✓s' �v.*/�vs-r�i..� TG�jP� �y �r-� .. _ ��� Revised 4/97 �� Kucinski Consulting Services Gig Harbor, WA Gary Kucinski, Principal December 30th, 1999 • 2901 South 40th Street Tacoma, WA 98409 Autumn 1999 Monitoring Report Heritage Woods Schneider Homes, Inc. 6510 Southcenter Boulevard, Suite 1 Tukwila, Washington 98188 To: Mr. Dennis Alfredson Manager of Development and Construction ■ Project Planning ■ Environmental Analysis • Wetlands Delineation • Permits & Licenses Subject: Wetland and Buffer Monitoring at Heritage Woods Dear Mr. Alfredson: INTRODUCTION (253) 474-6488 Fax (253) 474-0153 H GNIVED BY U€100MI 1►tr DEPARTMENT This report presents the results of our Autumn 1999 monitoring activities at Heritage Woods. The report includes observations of both Phase I work (the original Wetland Mitigation Plan as prepared by del Moral & Associates) and Phase II work (Supplemental Wetland Creation Plan as prepared by KCS, Gary Kucinski). RESULTS AND DISCUSSION - PHASE I Phase 1 Wetland Creation Areas Wetland Creation Area #1 This constructed wetland has not developed into a functioning wetland. It is an upland area. Additional constructed wetland area has been incorporated into the Supplemental Wetland Creation Plan to compensate for the loss. Wetland Creation Area #4 This upland area was earmarked by del Moral and Associates as a wetland creation area. Our Autumn 1998 Monitoring Report indicated that available hydrology may not Autumn 1999 Heritage Wouds December 301h 1999 Page 2 of 8 be sufficient to convert the area into wetlands. As part of the Supplemental Wetland Creation Plan, additional water was brought to the area in order to establish wetland hydrology conditions. For further information, please see comments under Phase II monitoring. Wetland Creation Area #DEA - "A" and #5 These two areas lie adjacent to drainage channel. Conditions appear to be about the same as those noted in the Autumn 1998 Monitoring Report. Wetland creation shortfall has been incorporated into the Supplemental Wetland Creation Plan. Wetland Creation Area #7 Conditions are similar to those reported in the Autumn 1998 Monitoring Report. The small area of wetland deficit has been incorporated into the Supplemental Wetland Creation Plan. Wetland Creation Area #8 - This constructed wetland is larger than the design area. The original Wetland Mitigation Plan called for this area to be 4,375 square feet in size. The December 1998 survey indicated that it is actually 7,908 square feet. Upon first glance, this wetland appears to be choked with sapling size cottonwood trees. In actuality, the vegetation community is quite diverse. The diversity may even continue to increase due to the implementation of additional features suggested in the Supplemental Wetland Creation Plan (specifically, excavation of some shallow trenches in the bottom of the wetland). Please see additional comments under Phase II Monitoring. Phase I Buffer Enhancement Areas Buffer Enhancement Area #1 It appears that this area, located on the slope adjacent to Military Road, may not have received as much attention as necessary due to the concentration of efforts which were made on wetland remediation. Some work remains to be done. Please see additional comments under Phase II Monitoring. Buffer Enhancement Area #2 This small area is located along a former access leading from Military Road into the storm water mitigation site. This buffer enhancement location also needs additional attention. See comments in the Phase 11 Section for additional information. Autumn 1999 Heritage Wouds December 301h 1999 Page 3 of 8 Buffer Enhancement Area #3 This area is a linear plot located alongside the gravel service road within the storm water detention site. Our recommendations to thin the volunteer alder saplings and replant the previously planted (now dead) trees and shrubs have been accomplished. We will continue to monitor this area. Buffer Enhancement Area #4 This area is a linear plot located at the far north end of the mitigation site alongside a former access road. The newly constructed Wetland Area 100 appears to extend near to this area. A substantial amount of buffer plantings have been installed around the perimeter of the new wetland area. It appears that our recommendations for this buffer enhancement area have been adhered to through planting of the upland areas that surround the newly constructed wetland. Buffer Enhancement Area #5 This small area is located along the toe of the slope adjacent to the new homes in Division II of Heritage Woods. Surface erosion had buried some of the plantings in Area #5. The area has been cleaned up although surface erosion still requires some attention. The main focus should be to stabilize the upslope area and keep the erosion control features well maintained until the soil and vegetation have become firmed up. Detention Pond Buffer Area This area has been addressed very well. The dead trees have been replaced. Also, shrub species, most notably snowberry, are growing very nicely. RESULTS AND DISCUSSION - PHASE II Because the wetlands constructed under the original Wetland Mitigation Plan were not entirely successful, a Supplemental Plan was prepared. Work completed under the supplemental plan is referred to as Phase II or "new" mitigation work. Wetland Creation Area #4 The original Wetland Mitigation Plan appeared to be relying more on "hope" than design in creating Wetland Area #4. This area was identified as an upland area by David Evans and Associates as part of their 1992 delineation. The del Moral plan hoped to convert the area into wetland by building soil "collars" around installed vegetation. The collars would serve to retain water around the plants thus leading to a prevalence of r Autumn 1999 Heritage Woods December 301h 1999 Page 4 of 8 hydrophytic vegetation. The del Moral plan assumed that the area possessed a hydrological regime very close to a wetland condition in its unmodified state. The "collar" plan has not been successful. Consequently, in accordance with the del Moral contingency plan, additional water has been brought to Area #4. It is too early to tell whether the effort has been successful. Visual observation indicates that additional water has been delivered to Wetland Creation Area #4. We will be better able to determine if this additional water has created a wetland hydrological regime after the area is monitored in the Spring. Construct Additional Wetland Area Adjacent to the Large Natural Pond This area looks very good. The ground surface was inundated at the time of our monitoring visit. We observed no dead plants within the wetland area. Some of the plants installed in the buffer show signs of stress, but we will be able to evaluate this condition more accurately during the Spring monitoring event. Restore Hydrology to Wetland 'D" As part of our initial monitoring effort, we noted that portions of Wetland "D" were not functioning as wetlands due to inadequate hydrology. We suggested that additional water be brought to this area. Visual observation of existing conditions indicates that additional water has been delivered to Wetland "D". We will be better able to determine if this additional water has restored wetland hydrology to the area after we examine the area in the Spring of 2000. Recommendations and Comments In a letter written last year by me to Dennis Alfredson, Manager of Development and Construction for Schneider Homes, I included a list of actions to be taken in order to address issues at the Mitigation Site. Those actions and related comments made by me are presented below. Wetlands Recommendation Wetland Creation Areas 100 and 200 - Excavate as necessary to create these areas to include shallow meandering trenches in the bottom of the wetland creation areas. Install plants. See the Plan. Autumn 1999 Heritage Woods December 30th 1999 Page 5 of 8 Comment Wetland Creation Area 200 was not constructed due to concerns over grading and steep slopes. Wetland Creation Area 100 was enlarged to compensate for the situation. The constructed area and buffer both look very good. Vegetation is alive and adequate hydrology appears to be present. We will see how it looks in the Spring and Fall of year 2000. Recommendation Existing Wetland Creation Area #8 - Excavate shallow meandering trenches in the bottom of this existing wetland area. This work has been accomplished. It should help to increase vegetation diversity in this constructed wetland. Recommendation Pre-existing Wetland 'D" - Bring storm water to the wetland from Catch Basin Number 4. Install a culvert under the existing service road. Remove blackberries. Plant salmonberry, red -twig dogwood and Western red cedar per Plan. Comment This work has been done. We will continue to monitor the area in order to measure the success of the correction action. Recommendation Wetland Creation Area #4 - Bring storm water to the wetland from Catch Basin Number 3. Shave off the ridge between the pre-existing Wetland "D" and Wetland Creation Area #4. This ridge tends to trap water and prevents it from flowing across Area #4. Remove blackberries. Plant salmonberry vines to replace the blackberries. Comment The recommended actions have been taken. Future monitoring visits will help determine the degree of success of our accomplishments. Also, please see additional comments under the Phase II Results and Discussion section of this report. Autumn 1999 Heritage Woods December 30th 1999 Page 6 of 8 Recommendation Wetland Creation Areas #DEA - A and #5 - Remove and discard plastic pots and trash. Comment The recommended actions have been taken. Recommendation Wetland Creation Area #1 - This area is now considered by all parties to be buffer, not wetland. Remove blackberries, scotch broom and reed canary grass. Replace dead fir trees with big leaf maple trees. Comment The work has been done. Buffers Recommendation Buffer Area 1 - Weed out some sapling red alder trees to reduce competition with planted species. Replace dead plants with equal numbers of the same kinds. Water as necessary. Comment This area still requires some attention. It may have been overlooked due to the concentrated efforts made on wetlands construction. Recommendation Buffer Area 11 - Replace dead hemlock trees with six Douglas fir trees and six Big leaf maple trees. Replace dead sword ferns and snowberry plants. Water as necessary. Erect a barrier and sign to prevent the use of this area as a trail. Comment This area still requires some attention. It appears that the trail from Military Road will continue to be used for access. Perhaps the best solution would be to "move" the buffer enhancement area slightly toward the northeast where the probability of disturbance will be less. Autumn 1999 Heritage Wouds December 30th 1999 Page 7 of 8 Recommendation Buffer Area /// - Weed out some sapling red alder trees to reduce competition with planted species. Replace dead conifer trees with equal numbers of the same species. Replace dead red elderberry plants with equal numbers of salal. Replace dead snowberry plants with equal numbers of snowberry. Water as necessary. Comment The recommended actions have been accomplished. It may be helpful to install a few more salal and snowberry plants. Recommendation Buffer Area IV - Replace dead Western red cedar trees with Big leaf maple trees. Replace dead red elderberry shrubs with equal numbers of salal plants. Water as necessary. Comment This area has now become, at least in part, the buffer for the newly constructed Wetland #100. The installed plants look good. We will be able to make more definitive comments after the Spring and Fall monitoring visits. Installation of additional salal plants may be helpful. Recommendation Buffer Area V - Replant this area as necessary to replace dead or buried plants. Install suitable erosion control measures to prevent future soil movement. Water as necessary. Comment The recommended work is completed. Some minor attention to maintenance of erosion control features is still necessary. Recommendation Detention Pond Buffer Area - Replace all dead trees with equal numbers of the same species. Water as necessary. Autumn 1999 Heritage Woods December 30th 1999 Page 8 of 8 Comment The work has been accomplished. The area looks very good. This concludes the Autumn 1999 Monitoring Report of Heritage Woods. Sincerely, W-S. Kucin ncipal' ures If AUTUMN 1999 MONITORING r�rPik r s Wetland Construction Area #8 Wetland Creation Area #4 AUTUMN 1999 MONITORING Buffer Enhancement Area #1 Buffer Enhancement Area #2 AUTUMN 1999 MONITORING Buffer Enhancement Area #3 Buffer Enhancement Area #4 AUTUMN 1999 MONITORING Buffer Enhancement Area #5 Detention Pond Buffer Area �y\ 85 RAFT ISLAND / GIG HARBOR, WA 98335-5918 (Gary Kucinski) phone (253) 474-6488 Fax (253) 474-0153 aCTENT/ON i i .POND 1 C = Wetland Creation site ,0 3E = Buffer Enhancement Site ---- HERITAGE :1N001) Wetland :Creation.-$; Buffer Enhancement re s ... ..... ------- �TkITY DISTRIC' December 30, 1999 LAKEHAVEN UTILITY DISTRICT 31627 -1st Avenue South • P.O. Box 4249 • Federal Way, Washington 98063 Federal Way: 253-941-1516 • Tacoma: 253-927-2922 • Fax: 253-839-9310 Dennis Alfredson, P.E. Schneider Homes, Inc. 6510 Southcenter Blvd., Suite #1 Tukwila, WA 98188 RE: Heritage Woods Division I — Sewer Easement Dear Mr. Alfredson: R�CEIVEP FEDERAL WAY PUBLIC WARES ADMINISTRATION DIVISION Thank you for providing a site map of the wetland enlargement proposed in the area of the subject easement. The District would prefer that no portion of the wetland be expanded over the existing sanitary sewer system or easement. It appears that there is sufficient area to avoid this intrusion. If the intrusion cannot be avoided, you will need to request an easement encroachment agreement. This request must be submitted in writing, along with a non-refundable deposit of $100.00. Actual expense for time, materials and overhead related to review of the encroachment request will be accounted for and any such expense in excess of the foregoing deposit will be invoiced accordingly upon completion of the review process. Your request will be presented to the Board of Commissioners, together with a staff report recommending its approval or denial. Please call me at (253) 946-5406, or Brian Asbury, at (253) 946-5407, if you have any questions. Fax correspondence to Development Services should be directed to (253) 529-4081. Sincerely, i J hn A. ensen Engineering Technician II jjensen@lakehaven.org JAJ/mey c: City of Federal Way — Surface Water Management ec: Water Operations & Engineering Manager Development Engineering Supervisor General Counsel Tom Jovanovich Dick Mayer Donald L.P. Miller Ed Stewart Beverly J. Tweddle Commissioner Commissioner Commissioner Commissioner Commissioner CITY OF � A\I ' 33530 1ST WAY SOUTH September 15, 1999 Mr. Dennis Alfredson Schneider Homes 6510 Southcenter Blvd, Suite #1 Tukwila, WA 98188 (253) 661-4000 FEDERAL WAY, WA 98003-6210 f' fop 6._' is Re: Heritage Woods Division 2, Wetland Creation and Mitigation —File SUB98-0003 Dear Mr. Alfredson: This letter is in response to your July 30, 1999, letter and September 10, 1999, memorandum regarding wetland "D" at Heritage Woods. In summary, you have requested the opportunity to re-evaluate the original wetland delineation boundary of wetland D of Heritage Woods. You suggest Mr. Kucinski (your wetland consultant) is skeptical of the accuracy of the original wetland delineation, which dates back to the early 1990's. Your concern with the boundary of wetland D is summarized in your July 30, 1999, letter which states; "My concern is that at the end of the monitoring period we will not be able to come up with the square footage matching the original square footage. The area in question, if my understanding is correct, is not terribly large, but is probably significant, " At our field meeting on September 7, 1999, you, Lizzie Zemke from Adolfson Associates Inc. (AAI), Gary Kucinski, and I discussed the possibility of re-evaluating the boundary of wetland D and the potential ramifications of this re-evaluation. It was generally agreed upon that there may have been an inaccuracy in the field survey of the wetland (due to the natural topography and mature vegetation we observed). The city agreed that you may have Mr.' Kucinski re-evaluate the wetland boundary and provide historical information to document any inaccuracy of the original delineation. Due to the extensive project history in regards to wetlands, any proposal to re- establish or modify previously delineated wetlands must be extremely well documented and discussed in writing by Mr. Kucinski as it appears the hydrology of wetland D may have been altered during infrastructure construction for Heritage Woods. As I stated at the meeting, the city will thoroughly review and scrutinize this proposal to re-establish a wetland boundary which was initially prepared by a wetland specialist on behalf of the previous property owner and confirmed by the city's wetland consultants. Mr. Dennis Alfredson September 15, 1999 Page 2 Lizzie Zemke with AAI will review the delineation and provide a written recommendation to the city for our review and final decision. All costs incurred by AAI must be paid by Schneider Homes, with a deposit required prior to authorization. Schneider Homes will be billed for the site visit by AAI on September 7, 1999. If the city should agree there was an error in the original wetland boundary, and wetland D is not as depicted on the original wetland delineation and as -built drawing, then Schneider Homes would be obligated to maintain, enhance, and monitor the actual size and location (revised) of wetland D as discussed in the original approved wetland report. Please be sure not to confuse this discussion of the size and location of wetland D with Schneider Home's obligation to fulfill the wetland creation area of 25,003 square feet as identified on page 3 of the December 9, 1996, as -built wetland report by Roger delMoral.' I understand your concern on'this matter was sparked while implementing the supplemental wetland creation plan provisions contained in the Kucinski report, revised January 22, 1999. 1 will also take this opportunity to remind you to secure written approval from Lakehaven Utility District for the intrusions that appear to have been recently created by the excavation of wetland 100 into the sewer line easement. The excavation appears to intrude into Lakehaven's easement and exceeds the limits approved on the Kucinski plan sheet C-1, revised January 22, 1999. Regardless of the outcome of the wetland D issue addressed above, the wetland creation/ enhancement areas must be completed and planted this fall. We look forward to getting this issue resolved and getting the new wetland creation area as -built report this fall, fallowing planting of all impacted areas. If you have any other questions, please contact me at (253) 661-4019. Sincerely, Ji azris Senior Planner c: Jim Femling, Engineering Plans Reviewer Lizzie Zemke, AAI L AP KN1 SYS\DOC UM CNl1SU B98_00.03\cd091399. doc ' Please note the table on page 2 of the Kucinski Supplemental wetland creation plan incorrectly identifies the required wetland creation area of 22,825 square feet, and must be corrected in future as -built and monitoring reports. 02; O'1,'1999 08: a2 2067899684 1 February 1999 Mr. Jim Harris City of Federal Way 33530 First Way South Federal Way, Washington 98003-6210 ADCLFSOh ASSC RE: Heritage WoWs Mitiption Pia_, Review AAA Task 97103.81 Dear .Tim: PAGE 02 -0- ADO1.1"1'0itii f1SS(a0ATE' i.1NC:_ Adolfson Associates, Inc, (AAI) has reviewed the most recent (25 January 1999) revision of the Supplemental Wedand Creation. Plan for. the proposed Heritage Woods project.. The plan and its subsequerit revisions were produced by Kucinski Consulting Services, Inc. ( CS) for Schneider Homes, and were intended to provide an approach to rectify failed wetland mitigation efforts. or. the Heritage Woods site located on Military load in Federal Way, Washington. Our earlier concerns have been addressed by the most recent plan. The last time we reviewed this plan our mab) concern was that the anticipated water regitnes and vegetation classes were not described in the tent or shown on the plan sheets. Although we would still like more assurance that particular wetland conditions will develop at specific locations in the mitigation areas., as requested the applicant has addressed the issue, and we are comfortable approving the plan with the level of detail it currently provides. In addition to reviewing the raidgation plan, AA1. has also been, asked to review the Heritage Woods rttitigation monitoring reports that will be submitted over the. next five years. For the purpose of explaining the new monitoring schedule, we will refer to the original monitoring phase (1997-2001) as phase 1, and the second monitoring phase (1999-2003) as Phase U. The original mitigation work (Phase 1) was to be monitored for five years beginning irk 1997. This original monitoring schedule, called for two monitoring events in 1997 and two monitoring events iv 1998, and them one monitoring event in each of the next three years. Schneider Homes'and/or- Parklane Ventures submitted some late reports and missed submittals during the first two years of monitoring for this phase, and therefore the City has now required that Phase I be monitored twice in 1999, twice in 2000, once in 2001 and once in 2002. The new mitigation plan (Phase 11) will also require five years of monitoring, and it will be possible to combine some of that work, with the originally scheduled monitoring effort. F.nviranoneittal Ana!y,.;k 5.309 Shdshale Ave. NW Seattle, IM 98107 a doliso"@adalfson.co"1 (2.o6) 7,89-965,8 FAX (Y06) 789-9684 �Ob 02/01/1999 08:42 206 099684 ADOLFSON ASSC PACE 03 The new monitoring schedule will be as follows Year Spiring Fail Additional frost for phase 1I 1999 Phases I&U Phases I&II $1005 2000 Phases I&IT Phases 1&II $1035 2001 Phases 1&II $305 2002 Phases I&II $1065 2003 Phase II U99-5 $4505 Total Additional Cost The total cost for monitoring Phase II, in addition to the amount already set aside for Phase I monitoring, would be $4505_ This cost reflects anticipated AAI billing rate increases, as well as a moire intense level of monitoring review necessary because of the history of problems associated with this project. Please call me at (206) 789-9655 if you have questions. Again, thank --your for providing us with the opportunity to work on this project. Sincerely, Adolfson Associates, Inc. L,izzie 7.eraike Senior Ecologist 02/01/1999 08:42 2067899664 APOLFSON ASSC PAGE 81 ADOLkSON ASSOCIATES INC. 3?09 Si1I SHOLE AVE, NW, SUITE 200 SEATTI,Z, WASHINi7TON 98107 (206) 789-9658 FAX (206) 769-96$4 ADOLFSONOADOLFSON.COM FAX TRANSMITTAL TO: FROM: .Timms Harris Lizzie Zemke COMPANY: DATE; City Of F(Ak-TW Way Febmary 1, 1999 FAX NUMBER: TOTAL NO. OF PAGES INCLUDING COVER; 253/661.4575 _ _ 3 PRONE NUMBER: PROJECT NAME/NUMBER! . 253/661 4,109 HedtageWoods 97103 Heritage Woods Utter --FINAL VERSION ORIGINAL WILL FOLLOW By: US MAIL []COURIER (] EXPRIrS s MAIL [I E-MAIL. ikfaPn T� •cam .h..:^ ^__—___._-. _..-_MFN'X-+ — -�_�a slff.� C.Cv['Y: �TY.G"'.C-+Y.rt�r X61313'14ZO." This is the final version Of the plan review letter. I aryl mailing it now. Sorry for the delay —the draft got buried on Andy's desk. The version I am mailing is identical to the draft version you have already seers, Please call if you have questions. -Lizzie t. Y'v..- •�•mdR/dP1"r7e C::.i+'L ".'-0r:. ••d "T`..Vz_1z-w r. r.....•—•'—.rxi-i'VMUM PORTLAND CLLs ELI%M 333 SW FIPTH AV9., SUITE 6M P. 0. BOX 341 PORTLAND, OREC-ON97204 c:LE SLUM, WASHINGrUN 98922 PHONE: (503) 2264018 PHONE. (jN.) 674-5125 M. (503) 226,8016 FAX. (509) 674.5305 ADe LY90Y-.PDX01P1Vr.NkT SANPID14AOLCOM Supplemental Wetland Creation Plan for The Plat of "Heritage Woods" City of Federal Way, Wit Prepared by Gary Kucinski Kucinski Consulting Services, Inc. (This Document is a Supplement to the "Final Wetland Creation & Buffer Enhancement Plan" as prepared by del Moral & Associates t� Revised October 23, 1995) ��. RECEIVED BYJanuary 12, 1999 N� COMMUNITY DEVELOPMENT DEPARTMENT Revised January 18, 1999 JAN 2 5 ,,1999 Revised Janccary 22, 1999 INTRODUCTION: Wetland monitoring by KCS (Gary S. Kucinski) during October 1998 revealed that portions of constructed wetlands at the Heritage Woods subdivision have failed. The specific conditions are shown below. WETLAND IDENTIFICATION DESIGN AREA "AS- BUILT" CONSTRUCTED 12/22/98 WETLAND SURPLUS AREA AREA 12/22/98 (DEFICIT) vs 12/9/96 DESIGN AREA #1 2,700 sq. ft. -0- -0- (2,700 sq. ft.) #DEA-"A" 3,525 sq. ft. 2,744 sq. ft. 1,335 sq. ft. (2,190 sq. ft) #4 7,750 sq. ft. Not -0- (7,750 sq. ft.) measured #5 3,000 sq. ft. 8,498 sq. ft. 1,138 sq. ft. (1,862 sq. ft.) #7 1,475 sq. ft. 95 sq. ft. 820 sq. ft. (655 sq. ft.) #8 4,375 sq. ft. 6,633 sq. ft. 7,908 std. ft_ 3,533 sq. ft. 22,825 sq. ft. 11,201 sq. ft. Total Surplus or (11,624 sq. ft.] (Deficit) As indicated by the above table, constructed wetland areas are 11,624 square feet less than called for on the original design. Two items are notable; The difference between the 1996 "as -built" wetland areas and the 1998 constructed wetland areas can be explained largely by del Moral & Associates interpretation of "as -built" to meat. the total area where plants were installed regardless of whether the subject area was confirmed as exhibiting wetland characteristics. 2. The overall project requirements were; Total wetland replacement area needed: 34,631 sq. ft. Credit given for "natural' pond: L 1,806) sq. ft. Wetland area to be constructed: 22,925 sq. ft. As shown in the table, 22,825 sq ft of constructed wetland area is consistent with the sum of the Design Area column of the table. Based upon these findings, the City of Federal Way has determined that the 11,624 sq ft of wetland deficit must be corrected. This plan was developed in conjunction with the City of Federal Way and its consultant, Adolfson Associates. GOAL: The goal of this correction plan is to: Supply sufficient water to wetland location Area #4 to insure that it becomes wetland as determined by application of the multi -parameter methodology (hydric soil, hydronliytic vegetation and wetland hydrologic regime). 2. Create 3,900 square feet of functioning wetland adjacent to the western side of the existing "natural' pond. 3. Restore hydrology to the pre-existing wetland "D" so that it once again functions as a wetland. CORRECTION PLAN: The plan to correct the deficit condition at Heritage Woods consists of three parts: Supply additional water to wetland creation areas #4 (7,750 square feet) as contemplated by the del Moral contingency plan. 2. Excavate an area outside the western end of the existing natural pond (2,640 s.f.). This created wetland area is to be know,, as Wetland 100. The excavation will be in a similar fashion to that employed to create Wetland area #8 Excavate and widen along the southern bank of the pond. This created wetland is to be known as Wetland 200. Again, the excavation is to be made similar to created Wetland 8. Effective functioning of these three areas as wetlands would result in the following condition: Existing Wetland Deficit: (11,624) sq. ft. Area #4: 7,750 sq. ft. Wetland 100: 2,640 sq. ft. Wetland 200: 1,260 sq. ft Net Wetland Surplus or (Deficit) 26 sq.ft. In addition, it appears that the existing wetland "D" has ceased to function as a wetland due to inadequate hydrology. Consequently, it is proposed that hydrology be restored to wetland "D" by tapping an existing storm water catch basin and discharging that water along the upstream end of wetland "D" (see plan drawing). The speculation is that construction of storm water improvements in the area of wetland "D" has cut off its previous source of water, which resulted in a change from wetland conditions to upland conditions. The previous source of water for wetland "D" was probably surface runoff, which was captured in the depressional area and side slopes of this landscape feature CONSTRUCTION PLANS: The associated drawings provide details and specifications with regard to construction and implementation of this correction plan. Wetland Creation Area #4 will be made effective by introduction of additional stormwater from Catch Basin #3. The dispersal pipe will be perforated (slotted) and placed along the upper edge of Area #4. The anticipated volume of diverted stormwater will be sufficient to result in wetland conditions. Blackberries that have invaded this area are to be removed. Facilitative vegetation (PAC), which populates this area, will remain. Salmonberry plants will be planted in place of the removed blackberries, in clumps of 3-5 in a random pattern at approximately 7 feet on center. In addition, natural colonization will occur by desirable plant species compatible with the revised water regime. Part of the reason for the initial failure of portions of Wetland #4 appears to be inadequate preparation of the grade, which would have been required for the area to function effectively as wetland. Minor regrading to remove existing hummocks will be accomplished in order to facilitate water coverage. • Wetland "D" is to be restored by tapping Catch Basin #2 in a similar fashion to CB 3. Dispersal pipe details and blackberry clearing are similar to the above specifications for Area #4. 4 The tapping of these catch basins is described in del Moral's Contingency Plans on the original report. After blackberries and/or other undesirable species are removed from the pre-existing wetland "D" area, re -planting with desirable species will occur. Salmonberry in 3-5 plant clumps will be installed in a random pattern at approximately 7 feet on center. Western red cedar will be planted at approximately 30 feet on center. Red osier dogwood will be installed at approximately 20-foot centers. Alder and/or cottonwood and willows will be allowed to colonize as volunteers. Blackberries will continue to be removed until desirable species have gained dominance. • The newly constructed Wetlands 100 and 200, adjacent to the natural pond, are intended to be emergent wetlands with scrub -shrub components. Small -fruited bullrush and/or hard -stem bullrush will be planted in shallow, meandering trenches (6" — 8" deep), which are to be excavated in the bottom of the wetland area. Sitka sedge and/or slough sedge will be planted adjacent to the trenches. Willows and red - osier dogwood will be planted in those parts of the constructed wetland nearest to the upland buffer. All species will be planted in masses, as is the typical pattern found in nature. Some invasion by red alders, willows and cottonwoods is expected. This will be tolerated, provided that naturally invading species do not become dominant (see the Contingency Plan). The pond fluctuates slowly in response to rainfall and runoff. Summer water levels may be lower than the level of Wetland 100 and 200 in late summer. The level of Wetland 100 and 200 will be such that the deepest part will be 18 inches below the high water level of the pond, which is similar to the depth of the pond. It will slope gradually to the high water level, at which point the surrounding uplands will act as a dam. It is anticipated that plantings will tolerate fluctuations within this range of variation, with emergent species planted lower and shrubs planted higher. Over time, the plants will expand or contract in response to the hydrology that develops; i.e. natural zonation. The normal pond surface elevation during the wet season is 372.2 ft., while Wetland areas 100 & 200 are to be constructed at 371.7 ft. It is possible that surface water fi-om the pond that contains suspended sediments could flow into these created wetlands and settle. In order to preclude this, a 12-inch high berm will be constructed between the pond and the wetland creation areas. Only openings two feet long @ 20 feet on -center will be constructed to maintain hydrology. While this feature may not prevent altogether suspended material from entering the constructed wetlands, it will serve as a substantial barrier. It is expected that some sediment fallout can be tolerated by the created wetlands without adverse impact. • Expected Ilydrological Conditions: Pre-existing Wetland "D": Although the wetland delineation report for the Heritage Woods site was not made available to KCS, the speculation is that Wetland "D" was probably a scrub -shrub wetland with a saturated to seasonally flooded water regime (PSSB to PSSC). The wetland may have contained western red cedar trees, as well as red alder trees, though not in sufficient quantities or size to change the category to forested (PFO). The former hydrologic condition will be restored by diverting a significant volume of storm water flow from existing Catch Basin #4. Based on interpretations of calculations of "STORM DRAINAGE DIVERSION TO WETLANDS," performed by D. Alfredson, P.E., it is expected that surface water will be present over most or all of the area for extended periods early in the growing season. The soil will remain saturated either at or near the surface though mid -June. By late summer to rnid- September, as rainfall diminishes significantly, the area is expected to be nearly dry, although soil in localized depressions will remain moist. Wetland Creation Area #4: It is expected that this area will exhibit a saturated water regime. The area receives water from sheet flow down the slopes as well as from Wetland "D". By tapping Catch Basin #3, sheet flow will be substantially augmented. Saturated soil conditions will be created, wherein the soil will be wet at the surface for extended periods during the growing season. However, due to soil type and grade, it is not expected that standing surface water will result for substantial lengths of time. Constructed Wetlands 100 & 200: The bottoms of these two wetlands Nvill be created so that there is a slight up -slope gradient from the edge of the pond (deepest area) to the upland border (shallowest area). In addition, shallow meandering trenches will be placed in the deepest areas. It is expected that a seasonally flooded water regime will exist in the deeper portions of the wetlands, as well as within and adjacent to the trenches. A saturated hydrological condition is expected in the shallower area of the constructed wetlands. Bulrushes will be planted in the trenches. Soil here is expected to remain flooded from early- to mid -growing season. Soils will gradually dry to the point where they will be moist but not saturated late in the growing season; i.e., cold -August through September. The areas adjacent to the trenches will be planted with sedges. Soils are expected to be seasonally flooded early in the growing season, and then transition to a saturated condition through mid -June. By July, the soils in these areas will be moist. By late August or September, assuming normal precipitation, as the pond surface falls, the soil will be dry. The shallowest sections of Wetlands 100 & 200 are expected to exhibit saturated conditions for extended periods during the growing season. Conditions will change to moist, and then dry by the late growing season. This area is designated as scrub - shrub, and will be planted in willows and red -twig dogwood. PERFORMANCE STANDARDS: The project will be considered successful if the following standards are met. Wetland Creation Area 44, Wetland Construction Areas 100 & 200, and pre-existing Wetland "D", shall exhibit the development of wetland conditions as determined by the application of the multi -parameter methodology, i.e., hydric soil, hydrophytic vegetation, and wetland water regime. Said methodology is described in the Washington State Wetlands Identification & Delineation Manual. (Ecology Publication #96-94). 2. At the end of the Monitoring Period, the vegetation shall be self-sustaining and cover 80% of the area planted. The minimum survival rate for trees, shrubs, and herbs, including desirable volunteers, is 80%, of the total number of planted individuals. During the first year, the contractor shall replace dead plants. The average woody plant should be at least 50% taller after five years. 4. After the Monitoring Period, ferns shall cover 50% greater area than when planted, with those having 50% more fronds than when planted. They shall be well - established. 5. At the end of the Monitoring Period, planted vegetation shall show no widespread signs of abnormal growth. 6. Wetlands shall be established on an area 22,825 s.f. outside originally delineated wetland boundaries. Should the project fail to meet performance standards, consideration shall be given to extending the monitoring program, and/or implementing contingency measures. If after the Monitoring Period, mortality exceeds the accepted standard or if mortality is spatially concentrated, reevaluation and recommendation for replacements will be made. MONITORING PROGRAM The purpose of the monitoring program is to document the degree of success or failure attained in achieving the performance standards and to identify remedial actions. A five- year monitoring program will be implemented to assess the completed wetland mitigation project. The "Monitoring Period" for work described in this Plan shall expire five years from the date of the maintenance bond and agreement to be made between Schneider Homes, Inc. and the City of Federal Way. For work that has been performed and described under the previously accepted del Moral report and Mitigation Plan (and not described in this Plan), the "Monitoring Period" shall expire as previously agreed and described in Bond # 447423S. That date is February 19, 2002. Upon completion of wetland construction, baseline monitoring reports (the "as -built" report) documenting construction activities and any deviations from the approved mitigation plan will be provided to the City within 45 days of installation. Subsequent monitoring shall occur early in the first growing season, at the end of the first growing season, twice in year 2, and once at ends of years 3, 4, and 5. A total of nine monitoring events, including the two as -built reports, shall occur. Permanent rectangular sample plots (25 ft. x 50 ft.) will be established and marked with rebar in each corner for repeat -measure sampling of survival and growth. Plots will be established as follows: Wetland "D" — 1 plot Wetland #4 — 2 plots Wetland 100 — 2 plots Wetland 200 — 1 plot All plants in the wetland enhancement area will be observed directly. All planted woody individuals and ferns in the project will be tagged with their species and sequence number for easy and certain identification. All plants will be scored at each monitoring time as healthy, stressed, or dead. The height and spread of all plants in the permanent plots will be recorded, as will the number of fern fronds. Any plant exceeding the height performance standard will not be measured subsequently. Paired t-tests will be used to determine the significance of growth increments. Photo -points shall be established from a fixed point at each permanent plot to collect a sequence of photos to evaluate vegetation over time. Photos will be included with each monitoring report. Invasion of noxious weeds will be noted. These species could include reed canarygrass, purple -loose strife, Himalayan blackberry, and tansy ragwort, but not cattails, slender rush, common horsetails, Watson's wiIIow herb, or hardhack. Water levels and soil saturation will be monitored directly at each permanent plot. If the plots are too dry, or if flooding is too deep, these facts will be noted and recommendations to alleviate the conditions will be made. To accomplish hydrologic monitoring, scaled wooden stakes shall be installed at each plot point where inundation is expected_ Water levels will be judged against the stakes. Soils lacking inundation will be probed at each sample time to determine the length of saturation. Soil moisture will be determined gravimetrically in each plot, and in adjacent uplands. Samples will be taken during normal monitoring, and, in addition, in May, August, and October of each year. Soil moisture data will be presented graphically against seasonal precipitation data. At each monitoring period, all species of wildlife that are observed or heard shall be noted. The water level of the pond will be monitored quarterly using a water level staff located near the west end of the pond near the flow control weir and a crest gauge on the weir itself. Water levels will be recording during each visit. Sedimentation will also be monitored by checking the sump in the Type II catch basin at the pond inlet pipe, as described above. Sedimentation will also be monitored at the flow control weir using a graduated pole. The results of each monitoring session will be reported, along with recommendations for maintenance or remedial action, to the Client and to the City. These reports will provide the mean height of each species, mean height increment, and number and percentage of individuals that have met the standard. Each report will summarize the project's status and will call for any specific remedial actions. Such actions include, but may not be limited to: fertilizing, reducing competition from herbaceous species, replacing dead or senescent individuals, and replacement of species. If, during the course of monitoring, major problems are revealed, then remedial actions will be recommended. The mitigated wetlands shall be observed for excessive erosion, scour, and sedimentation that may adversely affect the health and/or diversity of the overall wetland mitigation area. It is recognized that conditions evolve and personnel change over time. As [lie monitoring progresses, other methods or practices may be judged appropriate or practical for application to this Program. Modification to this Monitoring Program may be made if mutually agreeable to the project sponsor and the City of Federal Way. CONTINGENCY PLAN: Wetland Construction projects may fail due to inadequate hydrology, inappropriate soils invasion by weeds, competition from existing species, lack of soil fertility or a variety of other factors. Generally, wetland restoration projects may fail primarily due to invasive competition or insufficient efforts to restore lost hydrology. ■ If sufficient hydrology fails to develop in Area #4, adjustments can be made between the amount of water taken from Catch Basin No. 3 versus Catch Basin No. 4 (there appears to be ample water within the overall storm water system). This will be accomplished by adjustments to the invert elevations of the diversion pipe(s). A condition of insufficient hydrology is unlikely to occur, since the water taken from both catch basins is designed to saturate Area #4, albeit from different directions. 9 • If sufficient hydrology fails to develop in the pre-existing; Wetland "D" (judged to be an unlikely occurrence), the invert of the new diversion pipe at CB 4 will be lowered further. Note that water will not be diverted from Wetland F. Trickle irrigation may be installed. • There is some concern that the new Wetland Creation Areas 100 and 200 may become densely populated by rapidly growing, opportunistic cottonwood and/or alder trees. This has occurred on the opposite side of the pond in Wetland Creation Area #8. While this may be the pattern of natural succession, which Mother Nature chooses to employ, it is not consistent with the intention of constructing an emergent wetland with a scrub -shrub component. The objective will be to enable planted species to gain dominance within the constructed wetland, thereby limiting the opportunity for volunteers to colonize the area. If cottonwood or alder invasion becomes substantial, they should be thinned manually to enable planted species to gain dominance. It is possible that specified plant materials will not be available in sufficient members at the time required. The wetland biologist may suggest appropriate substitutions of native materials, but all plant material substitutions must be approved by the City of Federal Way prior to on -site delivery. Replacement species must have similar moisture requirements and fulfill the same general functional and structural role. ■ The landscape contractor must monitor the health of all newly introduced plant material quarterly for one year after the date of planting. Dead plants should be replaced as necessary during the appropriate season. • Nutrient depravation will be alleviated by suitable fertilizing. • Should weeds become too dense, they will be controlled manually. Unchecked, weeds will reduce survival and growth rates of young plants. • If plants die, they will be replaced by suitable individuals. If the mortality is sporadic, it is Iikely that the same species will be recommended. If it is general, then alternative species or habitat alteration will be required. • Should damage occur due to erosion, settling or other physical factors, this damage shall be repaired and the cause rectified. • If plants are growing poorly, or show deficiency symptoms during monitoring, additional slow -release fertilizer should be added as needed. a TIMING: Planting should occur in the wet season (i.e., February or March 1999) to maximize plant survival. If conditions necessitate that plants be installed when the soil is dry, then soil moisture sensors are specified on the drawing. Irrigation is required if indicated by inadequate soil moisture. BONDING REQUIREMENTS: The estimated construction costs is calculated by D. Alfredson as $26,700 (including Monitoring & Supervision). With the addition of 20% contingency required by the City, the calculated bonding requirement is $32,000. MONITORING & SUPERVISION COSTS: The estimate for monitoring and supervision is $11,200, SUMMARY: As part of the mitigation for unavoidable impacts to wetlands and buffers resulting from the development of Heritage Woods, a series of mitigation actions was undertaken. A total of 34,631 square feet of constructed wetlands was identified as mitigation. Of that amount, 11,806 square feet was credited for existence of the large open water "natural" pond. The resulting 22,825 square feet of constructed wetlands was distributed over six locations. As of October 1998, 11,201 square feet of constructed wetland was functioning. 11,624 square feet was not successful. This plan proposes to correct that deficit by; • Assurance that creation area #4 functions effectively through the provision of additional water, • Construction of two new wetland areas adjacent to the edge of the natural pond • Restoration of Wetland "D" by re-establishing its water supply. The intent of this correction plan is to be simple and achievable. The remaining items not covered in Greg Moore's letter to Dennis Alfredson, dated December 7, 1998, are addressed below: ■ Wetland Creation Area #1: This area is not considered to be wetland, but rather is part of the buffer enhancement area. Invasive species should be removed manually to prevent destruction of planted species. Replace dead fir trees with big -leaf maple trees at a 1:1 ratio. • Buffer Area II: Replace dead hemlock trees with six (6) Douglas plus six (6) big -leaf maples. Replace dead sword ferns and snowberry at a 1:1 ratio. Place a barrier to prevent the use of this buffer area as a trail. • Buffer Area IV: Replace dead western red cedar trees with big -leaf maple trees. Replace dead red elderberry with salal. Manually thin volunteer red alder saplings. Irrigate as necessary to ensure plant survival. • Buffer Area V: Replant this buffer area to replace plants buried by erosion. Install suitable erosion control features to prevent further problems. • Detention Pond Buffer Restoration: Replace dead trees with like numbers and kinds. Irrigate as necessary to ensure survival. 12 Schneider Homes, Inc. 16-Jan-99 COST ESTIMATE for NEW WETLAND MITIGATION PLAN D. Alfredson Item Quantity Unit Price Total Fell existing alders 20 ea $0.00 $0 Excavation & grading Wetlands 100 & 200 444 cy $6.00 $2,670 Excavation & grading Wetland 4 20 cy $20.00 $400 Hand -dig trenches in Wetlands 8 & 100 64 mh $25.00 $1,600 Plant Sedges Wetland 100 & 200 337 ea $2.00 $670 Plant Bulrushes Wetland 100 & 200 93 ea $2.00 $190 Plant Willow & Dogwood Wetland 100 & 200 211 ea $5.00 $1,060 Plant Red Alder Wetland D 27 ea $5.50 $150 Plant Dogwood Wetland D 59 ea $5.00 $300 Plant Salmonberry Wetland D 195 ea $2.50 $490 Soil preparation/place topsoil 148 cy $20.00 $2,960 Tap catch basins 2 ea $150.00 $300 Pipe, 6-inch, in place 315 If $15.00 $4,730 Monitoring & Supervision 8 ea $1,400.00 $11,200 Subtotal Contingency & Administration - 20% $26,700 $5,340 TOTAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $32,000 Note: Does not include work to replace dead plants other than Wetland D, or to remove invasive undesirable plants as specified in KCS October'98 report. This work is covered under existing bond. RECEIV] BY DEVELOPMENTCOMMUNITY OEPA7M�NT JAN 2 5 1999 JCIT�YOF 33530 1 ST WAY SOUTH November 10, 1998 Adolphson Associates Lizzie Zemke 5309 Shilshole NW Seattle, WA 98107 (253) 661-4000 FEDERAL WAY, WA 98003-6210 VIA FAX (206)789-9684 RE: Heritage Woods Wetland Monitoring Event - Fall 1998 Dear Ms. Zemke: I have previously provided a copy of the Autumn 1998 Heritage Woods wetland monitoring report by Kucinski Consulting Services Inc. Your firm will be continuing to review the monitoring reports for the Heritage Woods project, as we have contracted. Wetland monitoring reports were provided by the developer and reviewed by your firm in August and October 1997. The developer was late in providing the first monitoring report and the recommendations from the first review were not implemented by the developer. Therefore, as proposed by Kucinski, the two 1997 monitoring events combined represent the first wetland monitoring event. The Autumn 1998 monitoring report is being considered the second monitoring event for the first year. My records indicate that AAI invoices for the two 1997 monitoring events totaled $720.00. Therefore, the budget for review of this report is approximately $530.00. a total of six monitoring events remain and we have a total budget of $ 4,866.00 per our signed authorization forms. I have attached a copy of task authorization 9727-79A for this monitoring review. In 1999 (year 2) there will be spring and fall monitoring events. For the 1999 monitoring events we will use the signed task authorizations for 1998 totaling $1,300.00 (9727-79B). I will stress to the new owner of the project, the importance of maintaining the monitoring schedule. I anticipate receiving your review of the monitoring report by November 20, 1998. Please find attached the following: • Approved October 23, 1995 Final Wetland Creation and Buffer Enhancement Plan, Heritage Woods, , by Roger delMoral. ♦ 1998 wetland monitoring report by Kucinski Consulting Services Inc. Dated October 25, 1998 (mailed to AAI on October 30, 1998). • Signed task authorization 9727-79B. I will be out of the office from November 13, 1998, until the end of the year. Please contact Greg Fewins, Principal Planner at (253)661-4108 after that date. rely, b'z2,-ti� �]i � arri5 enior Planner I: hwoodsUdl 110.98 Kucinski Consulting Services, Inc. GARY KUCINSKI, Principal October 25, 1998 • Project Planning & Development • Environmental Analysis • Wetlands Delineation • Permits & Licenses AUTUMN 1998 MONITORING REPORT HERITAGE WOODS Mr. Dennis Alfredson Manager of Development & Construction Schneider Homes, Inc. 6510 Southcenter Blvd.. Suite #1 Tukwila WA 98188 Subject: Wetland and Buffer Monitoring at Heritage Woods Dear Mr. Alfredson: INTRODUCTION: RECEIVED BY COMMUNITY DEVELOPMENT DEPARTMENT OCT 2 8 1998 It is my understanding that Schneider Homes Inc., has purchased the Heritage Woods project from the initial developer, Parklane Ventures. As a result of the purchase, the responsibility to complete the wetland and buffer monitoring efforts has also transferred to Schneider Homes Inc. Instead of continuing to contract with del Moral & Associates, Parklane Ventures Wetland Consultant, you have requested that my firm assume the monitoring duties beginning with the Autumn, 1998 period. As a part of our effort to become familiar with the project, we have read relevant reports, reviewed drawings, spoken to Jim Harris at the City of Federal Way and discussed the project with you at some length. Probably the most important information I obtained came from telephone conversations with Andy Castelle and Jennifer Goodridge of Adolfson Associates, Inc. (AAI). AAI is an environmental consultant that is providing report review services to the City of Federal Way. They have reviewed previous monitoring reports regarding the Heritage Woods project. Mr. Castelle and Ms. Goodridge provided very valuable guidance. Jennifer Goodridge suggested that the current monitoring effort and future monitoring activities concentrate on the following: 85 RAFT ISLAND Q GIG HARBOR, WA 98335-5918 • (206) 474-6488 • Fax: (206) 474-0153 Mr. Dennis Alfredson October 25, 1998 Page 2 • Choose a representative data plot location within each wetland and buffer mitigation area. Mark it clearly and base observations on this same data plot for current and future monitoring periods. • Record observations of percent of vegetation areal coverage. Don't be concerned whether the vegetation cover is provided by planted individuals or desirable volunteers. • Make notes and recommendations based upon your observations. We have utilized the above described suggestions in this Autumn, 1998 monitoring work. ACTIONS Utilizing the official drawings of the Heritage Woods Wetland Mitigation Plan, we located the identified Wetland Creation and Buffer Enhancement areas on the project site. Sample points (i.e. data plot positions) were established in each monitoring area. The points are marked by 12 inch long steel bars driven into the ground. Beside each bar we placed a 4 foot long surveyor's stake with the respective mitigation area written on the stake. The sample point locations, therefore, are quite easy to find and can be re- established if the stake or steel bar is removed. To make the monitoring report easy to review, we have included a reduced scale sketch of the entire mitigation site with specific areas shown thereon. RESULTS AND DISCUSSION Wetland Creation Area #1 This is a 2,700 square foot area located on the down gradient slope north of the constructed detention pond. The area does not appear to meet the required criteria for classification as a wetland. From reading the del Moral monitoring report of Autumn, 1997 (page 5) it appears that some agreement was reached wherein this area was considered upland buffer, not wetland. Under Buffer Area Results, Detention Area, the report states; "The lower slope has salmonberry in the former wetland creation area that is not now considered to be wetland". The area in question is, indeed, functioning as upland buffer not wetland. It has become part of the adjacent buffer which borders the off site Wetland "G". Our speculation is that the wetland creation area was not able to capture and retain Mr. Dennis Alfredson October 25, 1998 Page 3 sufficient water to create wetland hydrology conditions. This is not particularly surprising given the sloped location of the wetland area. The area, however, appears to be integrating into the adjacent upland buffer. Salmonberry, lady fern and red -twig dogwood were planted in this area. Observations at the sample point include percentage of cover for desirable species (planted and volunteer), tree/shrub layer; and herbaceous layer. Notes and recommendations are also documented. Estimated Percent Cover @ Sample Point Tree & Shrub — 50% Herbaceous Layer — 100% Notes: Himalayan blackberry, scotch broom and reed canary grass are encroaching into the area. Some of the salmonberry plants are well established and thriving. Recommendations: We suggest that blackberries, scotch broom and reed canary grass be cleared from the area by physical removal (i.e. harvesting, not spraying). Plant 6 fir trees spaced approximately 30 feet on center in the subject area. Wetland Creation Area #4: This is a 7,750 square foot area located on the south side of the "natural" pond. Species planted within this area were Scouler's willow, western red cedar, Pacific willow and lady fern. The individual plants are located amongst established, mature trees and shrubs. No attempt was made to determine plant mortality. The sample point is located within an area of very dense vegetation. Observations, notes and recommendations follow. Estimated Percent Cover @ Sample Point - Greater than 100% Notes: Area 4 appears to be doing very well although it may not be wetland. Disturbance caused by road construction may have altered the historic hydrology conditions at the site. The soil is moist but may not be saturated to a sufficient extent to be classified hydric. Recommendations: I would leave this area alone, at least for the time being. We will see how conditions look in the Spring of 1999. Even if the area does not meet all of the criteria for wetland determination, it may be better to have it become good quality buffer rather than disturb it again in an attempt to create wetland hydrology. Wetland Creation Area #5 & DEA "A". Mr. Dennis Alfredson October 25, 1998 Page 4 These two areas abut each other. They are located on the south side of the overall storm water mitigation site, quite near Military Road South. A drainage course traverses this area. Water conveyed by this drainage course is discharged to the "natural" pond. Area #5 covers 3,000 square feet. Area DEA "A" is 3,525 square feet in size. Area #5 was planted with salmonberry, lady fern, red -twig dogwood, Pacific willow and Piper's willow. Area DEA "A" was planted similarly, but also included red cedar and Scouler's willow. No red -twig dogwood was planted in area DEA "A". Estimated Percent Cover @ Area #5 Sample Point Shrub Layer — 50% Herbaceous Layer — Greater than 100% Notes: Hydrology may be insufficient in parts of the area to support selected species. Recommendations: Additional plants should be installed as follows; 7 red cedar, 15 Scouler's willow, 11 lady ferns and 1 Oregon ash. Estimated Percent Cover @ Area DEA "A" Sample Point — 80% Notes: This area appears to be growing nicely although wetland hydrology may be weak as distance from the drainage course increases. Recommendations: Continue monitoring. Wetland Creation Area #7 This is a small (1,475 square feet) area associated with the original Wetland "F" located in the southwest part of the overall mitigation site. Planted species consist of lady fern, Scouler's willow and skunk cabbage. Estimated Percent Cover @ Sample Point — Greater than 100% Notes: Adequate hydrology is present. The area is doing well. Alder, cedar and salmonberry are also present as is horsetail. Adjacent uplands are dominated by maple. Some soft rush plants have invaded this area Recommendations: Continue monitoring, weed out soft rush volunteers. Wetland Creation Area #8: Mr. Dennis Alfredson October 25, 1998 Page 5 This is a 4,375 square foot area located on the north side and immediately adjacent to the "natural" pond. Water from the pond is allowed to enter this area through cut channels in the enclosing pond berm. The area was planted with Pacific willow, red -twig dogwood, slough sedge, bulrush, and Sitka sedge. Estimated Percent Cover @ Sample Point — 90% Notes: It appears that the planned hydrology conditions have been achieved. Planted species are growing, vegetation cover is excellent. Natural invasion of desirable volunteers (cottonwood and willows) is substantial. Recommendations: Continue monitoring. Remove soft rush. Buffer Enhancement Area 'T'. This area is located on the slope adjacent to Military Road South. It consists of two linear plots, each 100 feet long by 30 feet wide. Planted species include snowberry, Douglas fir and red cedar. Estimated Percent Cover @ Sample Point — 70% Notes: Mortality of planted species has been substantial. We speculate that insufficient water was available. Volunteer red alders are numerous. Recommendations: Replace all dead planted individuals. Water them if necessary. Weed out some red alder to reduce competition. Buffer Enhancement Area "U". This is a small area (2,500 square feet) located along a former access road leading from Military Road into the storm water mitigation area. Planted species were Western hemlock, snowberry, red elderberry and sword fern. Estimated Percent Cover @ Sample Point — 20% Notes: The area has not done well. Mortality is substantial. Lack of water may be the problem. Invasion by desirable volunteers is not occurring. Mr. Dennis Alfredson October 25, 1998 Page 6 Recommendations: Replace all dead planted individuals. Use Douglas Fir (3) and big leaf maple (2) as substitutes for the hemlocks. Replace red elderberry with salal. Water to ensure survivability. Buffer Enhancement Area M. This area is a linear plot approximately 400 feet long by 30 feet wide. It is located adjacent to the gravel service road within the storm water detention site. Planted species consist of hemlock, cedar, red elderberry, snowberry, and sword fern. Estimated Percent Cover @ Sample Point — 85% Notes: This plot is being invaded to a great degree by red alder, which accounts for the rather dense cover. This is not unexpected, and not necessarily undesirable. However, greater vegetation diversity is preferred. Recommendations: We suggest replacing all dead conifers with equal numbers of the same species, i.e. replacement in kind. Replace dead red elderberry individuals with salal. Replace dead snowberry plants with equal numbers of the same species. Remove some sapling red alders to reduce competition. Irrigate to ensure survivability. Buffer Enhancement Area /V. This area is a linear plot approximately 220 feet long by 30 feet wide located on a former service/access road. Plans called for the placement of the same species as found in Area III, i.e. hemlock, cedar, elderberry, snowberry and sword fern. Estimated Percent Cover @ Sample Point — 90% Notes: Invasion by red alder and various grasses is substantial. Alders are out - competing planted individuals. Recommendations: Replace dead or missing planted individuals with equal numbers of the same species. Substitute salal for red elderberry. Remove some sapling red alder to reduce competition. Water as necessary to ensure survivability. Buffer Enhancement Area V: There are a number of fir trees which were planted on the outside of the north and west slopes of the created storm water detention pond. The "as -built" drawing provides no information with regard to this activity. Nevertheless, the work was accomplished. The Mr. Dennis Alfredson October 25, 1998 Page 7 del Moral Autumn, 1997, monitoring report mentions both the Detention Pond Buffer and Buffer V. However, there is no information as to where these areas are located. Notes: I suggest that we refer to the north and west slopes of the created detention pond as Buffer V. Many of the trees planted along the slopes have died. The mortality has been greater on the west slope than on the north slope. Recommendations: Replace all dead trees with equal numbers of the same species. Irrigate to ensure survivability. SUMMARY General Observations: Wetland Creation Areas appear to be doing O.K. as an overall evaluation. Some areas may not meet the required criteria (entirely or in part) to be classified wetlands. This is due to inadequate hydrology or alteration of previously existing hydrological conditions. Providing a remedy to this problem may prove difficult and must be weighed against the advisability of disturbing the areas to "fix" them Buffer 1=; hancement Areas have done less than O.I. Mortality has been substantial. Colonization by native desirable volunteers has been good. However, it would be preferable to maintain greater vegetation species diversity in the Buffer Enhancement Areas. Specific Recommendations: 1. Wetland Creation Area #I. It appears that agreement was reached wherein this area is now considered to be buffer. We recommend that blackberries, scotch broom and reed canary grass be removed. Colonization by desirable, volunteer species should be encouraged. In addition, 6 Douglas fir trees should be planted approximately 30 feet on center in this area. 2. Wetland Creation Area #4. No recommendations at this time. Continue monitoring in Spring 1999. 3. Wetland Creation Area #5 & DEA "A": In Area #5, we recommend that the following plants be installed; 7 red cedar, 15 Scouler's willow, 11 lady ferns and 1 Oregon ash. In area DEA "A", we recommend no action at this time. Continue monitoring. 4. Wetland Creation Area #7 Remove soft rush which is an undesirable, invasive volunteer species. Mr. Dennis Alfredson October 25, 1998 Page 8 5. Wetland Creation Area #8. Remove soft rush. 6. Buffer Enhancement Area `'1": Replace all dead plants installed as part of the mitigation plan. Remove some of the volunteer sapling red alder to reduce competition. Artificial irrigation may be needed. 7. Buffer Enhancement Area II: Replace all dead plants installed as part of the mitigation plan. Substitute Douglas fir (3) and big leaf maple (2) for the dead hemlocks. Substitute salal for the specified red elderberry. Artificial irrigation may be needed. Remove scotch broom. 8. Buffer Enhancement Area III: Replace all dead conifers with equal numbers of the same species. Do the same with snowberry shrubs. Substitute salal for dead red elderberry. Remove some sapling red alders to reduce competition. Artificial irrigation may be needed. 9. Buffer Enhancement Area IV. Replace dead or missing planted individuals with equal numbers of the same species. Substitute salal for red elderberry. Remove some volunteer sapling red alder to reduce competition. Artificial irrigation may be necessary. Remove scotch broom. 10. Buffer Enhancement Area V (the outside north and west slopes of the constructed storm water detention pond): Replace all dead or missing trees with equal numbers of the same species. Artificial irrigation may be necessary. Action Plan: The above noted recommendations should be implemented this autumn -winter. Monitoring of the project has been somewhat inconsistent. I suggest that this report be considered the conclusion of Year 1 monitoring. Four additional years are proposed with observations of conditions to occur twice each year, once early in the growing season (e.g. April) and once late in the growing season (e.g. October). A brief report would be submitted at the conclusion of each observation period. This concludes the Autumn 1998 Monitoring Report. If you have any questions or comments, please feel free to give me a call at (253) 474-9449. Sincerely, - Z4 Ga . Kuc' ski incip . K C S 85 RAFT ISLAN` % GIG HARBOR, WA 98335.5918 (Gat']r KUCIt1Skl) Phone (253) 474-6488 Fax (253) 474-0153 !3t BF- V 0,CT--NT/ON I i l'ONO I OCTOBER 14, 1998 Sample Point @ Wetland Creation Area # 1 Sample point ,,�? Wetland Creation Area .14 OC OBER 149 1998 No Photo for Wetland Creation Area #5 3arnple point @ Welland Creation Area CtA "A" OCTOBER 14, 1998 4,'* - 4.0 W4R VUL 01 wlw� M 4.& Sample Point @ Wetland Creation Area #7 Sample Point @ vVetiand Creation Area #8 �s4 it � -�• T" t� s y � ��, -mow � � y r •r �4 . • r• t- . - ,cx. i. VFW _a' tit 4 %1 .9wft OCTOSER 14, 1998 Sample Point @ Buffer Enhancement Area V JCIT�YOF,j'C.-33530 1 ST WAY SOUTH December 9, 1997 David Morrison Parklane Ventures 31620 23rd Avenue South #320 Federal Way, WA 98003 (253) 661-4000 FEDERAL WAY, WA 98003-6210 RE: Heritage Woods Wetland Monitoring, Second Event Fall 1997- File No. SUB92-0005 Dear Mr. Morrison: Attached is a copy of the November 12, 1997 Adolphson Associates Inc. (AAI), review and recommendations of the Heritage Woods Autumn 1997 wetland monitoring report by Roger delMoral. At this time you must implement the 13 recommendations contained in the the September 23, 1997 and November 12, 1997 AAI letters, and the recommendations in the Autumn 1997 Report by Roger delMoral. Some of the recommendations in the September and November AAI reviews are substantive changes to the wetland planting and mitigation program, while other recommendations are procedural in regard to the report format and content. The AAI review also requires developing an action plan to improve site conditions and monitoring methods. If you feel it would be helpful to have Mr. delMoral discuss the specific AAI recommendations with the reviewer, please have him call Jennifer Goodridge directly at (206)789-9658. Please contact me at (253)661-4019 if you have any questions. Sincerely, �- Gt�l/L�-� im Harris Senior Planner C: Jennifer Goodridge, AAI 5309 Shilshole Avenue NW, Seattle, WA 98107 L:\PRMSYS\DOCLTMENTSUB92-00.05\CD120897.DOC 12 November 1997 Jim Hams City of Federal Way 33530 First Way South Federal Way, Washington 98003 Re: Heritage Woods Fall 1997 Monitoring Review Dear Jim, ADOLFSON ASSOCIATES, INC. At the request of the City of Federal Way, Adolfson Associates Inc. (AAI) has reviewed the Fall 1997 monitoring conducted by Del Moral and Associates at the Heritage Woods subdivision in Federal Way, Washington. AAI has reviewed the monitoring report, but did not conduct a field visit for review of the Fall 1997 report because as part of the Spring 1997 monitoring, the site was visited by AAI staff on 4 September 1997. The Spring review was submitted on 23 September 1997. Site conditions during that site visit are representative of site conditions when the Fall 1997 monitoring was conducted. Del Moral and Associates have incorporated some of the comments from the Spring monitoring review into a revised Fall report. However, the following recommendations from the Spring monitoring review were not addressed: As per City of Federal Way regulations, this mitigation site must be monitored for five years. There are several references in the monitoring report to discontinue the monitoring in less than five years. All areas must continue to be monitored throughout the five year monitoring period. Perhaps monitoring the mean spread, which does not relate to the standards of success, can be omitted. However, mean height monitoring and percent cover monitoring can not be omitted until the monitoring period is complete and the standards of success have been met. The tables containing mean height increase do not show the percent increase, so it can not be determined if the standards of success have been met. We are aware that it becomes difficult to distinguish installed vegetation, however, percent cover monitoring does not require this differentiation. Also, for mean height monitoring, some plants could be tagged to monitor their progress. • Percent cover should be monitored within each plot. To state that an area is "covered" with vegetation does not constitute percent cover monitoring. There are several methods for calculating percent cover and the goal is to document the percent composition by plant species within an area. Percent cover measurements should document installed plants as well as recruited plants. ■ Table 13 shows the numbers of plants that have survived compared to the number on the as - built drawing. This table was compiled by counting the number of dead plants. Does this assume that the rest are living? If so, this is not accurate. A stem count of the surviving plants should -be conducted (at least once throughout the monitoring period) in order to RECEIVED BY r,OMMUNIrr DF-VEI.aPMENT DEPARVEN7 Environmental Analysis 5309 Shilshole Ave. NW Seattle, WA 98107 adolfson@adolfson. com (206) 789-9658 FAX (206) 789-9684 C1 Jim Harris/Heritage Woods Page 2 1115197 determine the percent survival. Based on the numbers in Table 13, it appears that there is an overall 76 percent installed plant survival. Since the standard of success is 80 percent installed plant survival, a minimum of 67 new plants need to be installed in order to meet the installed plant survival standard of success. Also, installed plant survival as measured within the plots is 84 percent which is above the installed plant survival criteria. These calculations should be included in the monitoring report without requiring tallying by the reader. We concur with the planting recommendations throughout the monitoring report. Supplemental plantings should be installed this fall or winter, but prior to 1 April 1998. • The photo stations should be an overview of each area and be limited to 10-15 photos; fifty. is too cumbersome. Our previous letter recommends that an action plan be developed to improve site conditions and monitoring methods. Del Moral and Associates also makes suggestions for planting and hydrology revision, but does not indicate when and how these will be implemented. We would like to review an action plan this winter and so that it can be implemented prior to the Spring 1998 monitoring. We are pleased to have the opportunity to prepare this document for you. If you have any questions, please feel free to contact Andy Castelle or me at 789-9658. Thank you. Sincerely, ADOLFSON ASSOCIATES INC. Jennifer Goodridge Staff Biologist CITY OF (206)-0 33530 1ST WAY SOUTH FEDERAL WAY, WA 9800003-6216210 eo:r 24, 1997 Adolphson And Associates Jennifer Goodridge 5309 Shilshole NW' Seattle, WA 98107 RE: Heritage Woods Second Wetland Monitoring Event - Fall 1997 Dear Ms. Goodridge: Attached is a copy of the second monitoring report for the Heritage Woods preliminary plat. Your firm will be conducting the continuing monitoring for the project. The total review cost for the two 1997 monitoring events is not to exceed $1,250.00, per the approved 1997 task authorization form. I anticipate receiving your review by November 21, 1997. Please find enclosed the following: • Autumn 1997 Monitoring report by delMoral & Associates dated October 4, 1997 and received by the City of Federal Way on October 13, 1997. • Labeled photographs from Winter 1997 monitoring event. I previously provided you a copy of my October 13, 1997 letter to the developer (David Morrison) which summarized your first review comments and recommendations. Since the city's review of the first monitoring event, and the applicants submittal of the second monitoring event crossed in the mail, I assume your recommendations have not been implemented by Roger delMoral. Once you provide your review comments for this event, I will quickly forward the review to the developer, so we are assured that Roger delMoral incorporates your review recommendations into the spring 1998 report, and implements the winter recommendations prior to writing the Spring 1998 report. At this point we are playing catch up, due to the lateness of the developer providing the spring 1997 monitoring. If you need any additional information, please contact me at (253) 661-4019. Sincerely, i iii Hams Associate Planner C: David Morrison I: hwood s\aailetter. 2 - REC� =.0 2Y del Moral & Associates L;OMMUNPDEV=. 2002-42nd Ave. East N p V = 0 1997 Seattle, WA 98112 (206) 323-7106 FAX (206) 328-9050 October-30, 1997 Autumn 1997 Monitoring —Heritage Woods —REVISED REPORT Mr. David Morrison Park Lane Executive Center 31620 - 23rd Ave. So. Federal Way, WA 98003 Dear Mr. Morrison: This letter summarizes the monitoring undertaken at the Heritage Woods site; :it has been revised in accordance with comments made by Jennifer Goodridge of Adolfson _associates, September 23, but received by me October 17. The plantings were installed in order - •ao develop compensatory wetlands and to restore buffers. Monitoring was accomplished on S,�member 27, 1997, and represents the end of the first full year. For each area, a table is p=vided that compares the present results with those from the Spring, 1997 monitoring. In ear case, the tables show the number sampled, the mean and standard deviation of the mean heir-_ of woody species, the mean height and mean spread of low shrubs, and the number of fronds anad cover of ferns. The mortality of all planted plants was determined by count. Mortality was =-nmpared to numbers installed, as determined by the as -built report. Mortality is sunu�...=ized and summarized in the conclusions. A series of recommendations are included in this letter. These include those nmade by Ms. Goodridge, in addition to mine. The following procedures were followed: the height of all woody plants wii a moni- toring plot was measured directly from ground to the tip of longest shoot (in inches). -The spread was determined using a quadrat frame divided into 25 squares 20 cm (about 8 inches: con a side. The number of squares was used to estimate cover of plants. Plant height for indi idduals that were over 8 ft tall were estimated. The cover of individual tall shrubs and tree sperms were not measured since the height criterion is sufficient to judge success. For the herbs in Wetland 8, the total percent cover was estimated along thre` transects, reported separately. Only the planted species are reported. All plants in Buffer #5 were counted and measured. The plants were not sailed during spring, 1997. Further details are provided under each area. The Autumn 1997 values were compared statistically with the Spring 1997 values using a simple t-test. Values significantly larger (P < 0.05) than the Spring score are indicated by an asterisk (*). In most cases, significance was at least P < 0.001) Photos were taken from the corners of monitoring plots, as discussed below. A color photo copy of each photo is enclosed in this amendment. They are arranged in groups, with a cover page. I retain original photos and negatives for future reference. The photos are provided in Appendix I. HERE Description of Monitoring Wetland Creation Area DEA A The vegetation cover of Wetland DEA-A is nearly complete. The site appears to have adequate hydrology. The central part was saturated and there was a gradient of moisture extending outside the plot. The minor surface flow alterations recommended in the Spring report have been effective. There are many volunteering plants, most of which are desirable. Table 1 summarizes the situation for this wetland area. Photos 1 to 4 are provided for documentation. An asterisk indicates that the value is significant at the 0.05% level, by t-test. Table 1. Summary for Creation Area DEA-A. Spring 1997 Autumn 1997 Species n Height ± s.d. Mean spread n Height ± s.d. Mean spread Red cedar 10 27.3±6.1 3.1 10 41.4±9.6* ---- Willows 20 39.0±18.3 8.0 20 79.3±27.7* 20.9* Salmonberry 14 22±6.2 3.1 14 32.2±6.2* 19.7* Red -twig dogwood 1 27 1 1 42 18 Twenty lady ferns were specified. There were 18 ferns found, of which 12 were in the monitoring area. These ferns had 4.7 new fronds and covered 11.8 units (one unit is 10 by 10 cm). Red cedar and willows have increased in height by 50%. Salmonberry has grown more laterally, but has also increased significantly. The wetland condition of this site is evidenced by the nature of the volunteers: Watson's willow herb, slender rush, creeping buttercup, curly dock, alder and cattails are common. Recommendation: DEA - A should be monitored only for mortality as the individual species have met height and cover goals. 2 Wetland Creation Area 4 Since the Spring, 1997, monitoring, road grading has removed some of then.:., plants. Most of this area remains unsaturated. The road has been disturbed to cut off drainage rco this wetland area. Though most of the remaining plants are surviving, wetland hydrology does ,mot appear to have been maintained. Table 2 summarizes all the plants remaining in this area. All plants within _ zhe area were measured. Non -wetland plants were not measured. Photos 5 and 6 show this site. Table 2. Summary for Creation Area 4 Spring-97 Autumn-97 Species n Height ± s.d. Mean spread n Height ± s.d. Mean spread Red cedar 15 34.8 ± 7.1 2.8 8 38.2±9.2 ----- Willows 23 37.0 ± 15.5 2.6 22 86.3±34.8* 59.7* Salmonberry 28 17.1 ± 8.9 1.5 14 19.4±8.8 12.7* Lady fern (fronds) 16 6.6±1.9 2.3 9 4.7±1.9 7.7* Most of the willows survive, and these have grown to exceed their performance goals. Half of the remaining species have been lost to road grading. No dead plants :mere observed within the monitoring area. Recommendation: The engineer should provide adequate hydrology for r-i,;s area. The plants destroyed by road clearing should be replaced. Replacements should cconcentrate on willows, which are thriving on this site. 50 Scouler's willows and 10 salmonbe='es should be used to replace the losses. Wetland Creation Area 5 This wetland area occurs in two sections. Much of this wetland area is =ot sustaining wetland hydrology due to the slope. There is adequate hydrology, but water is —ot retained in much of the wetland. Soil was saturated in most parts of Plot B. In plot A, it was__; moist to wet, but not saturated. The total vegetation cover of this wetland area is high, but the cover is :dominated by herbaceous vegetation that was not planted. There are two wetland monitoring areas (Table 3). WL-5A (Photos 7-10) _ss further east, while WL-5B is on the west (Photos 11-12), and is associated with the swale. 3 Table 3. Summary for Wetland Creation Area 5 PLOT A Sprin-� -97 Autumn -97 Species n Height ± s.d. Spread n Height ± s.d. Spread Willows 17 30.5 ± 4.8 2.4 11 40±11.7* 5.8* Salmonberry 7 6.3 ± 1.1 1.9 5 12.0±3.7* 13.0* Lady fern dormant I--- --- --- --- Red-twig dogwood 7 32.6 ± 6.3 2.3 6 41.5±7.5* 8.8* YLUT B Species n Height ± s.d. Spread n Height ± s.d. Spread Pacific Willow 11 33.0 ± 9.8 --- 11 66.9±15.2* --- Scouler's willow 21 173.4 ± 13.5 --- 21 118±18.9* --- Salmonberry 11 1 9.1 ± 4.7 1.3 11 19.5±5.7* 12.9* Plot B has grown very well and there has been no mortality. Further monitoring should be confined to determining mortality of all species and spread of salmonberry. Willows and salmonberry have exceeded height goals. The salmonberry increased by about 25%, and is likely to achieve its cover goal. Plot A has not achieved wetland hydrology, and species are suffering. Though all surviving woody plants have grown, the mortality exceeds the performance standards. Lady fern may have died, though they are listed as dormant since this species will remain dormant under dry conditions. Recommendations: In Plot B, monitor only overall mortality and spread of salmonberry. Plot A requires hydrological alterations as recommended in the Spring report. The portion of this wetland around Plot B should be modified to improve wetland hydrology. The surface should be regraded to detain water. The ditch should be breached in two more locations to provide water to the wetland planted in the east of the plot. In addition, 15 lady ferns should be planted as shown on plan. To replace losses to date, 30 Scouler's willows should be planted within the area. Wetland Creation Area 7 The area was planted to skunk cabbage in November, 1996. All required skunk cabbage continue to thrive. In addition, the creation area has developed complete cover with wetland species. Willows are growing well on the periphery. The site was saturated and all plants were alive during this monitoring period (Photos 13 and 14). Recommendation: This site has established well. No further monitoring should be required. 4 Wetland Creation Area 8 The creation site was saturated and had 2 to 6 inches of standing water weithin it. The creation area has developed the planned water -level gradient. Water from the acdjacent pond enters through the cut channels. There is standing water in the herb area and sated soil in most of the shrub area. Only along the upper margins of the plot is the soil not sarazated at this time. There was little additional mortality noted since November. The herbs appear to be growing, and have not been attacked by geese. The site has been invaded by mainy cottonwood seedlings, willow seedlings from the immediate surroundings, and several species aff herbs. The result has been to create an effectively functioning wetland, with nearly complete vegetation cover. Two monitoring plots were established for shrubs (Table 4). Plot A (Photons 15-18) was 25 by 50 ft, and Plot B (Photos 19-22) was 25 by 45 ft. The data are summarized below: Table 4. Summary for Creation Area 8. PLOT A--SprinL, -97 PLOT A_AntnmmA7 Species n Height ± s.d. Spread n Height ± s.d. dread Willows 33 42.5 ± 15.8 3.6 33 44.3±14.5 _'r6.2* Red -twig dogwood 4 31.0 ± 6.3 11.3 4 40.3±10.4* PLOT B--Snrins, -97 PT,OT R_Au&nnvrn._Q7 Species n Height ± s.d. Spread n Height ± s.d. -Soread Willows 35 37.2 ± 11.1 2.7 35 43.5±14.8* --- 4.3* Red -twig dogwood 6 37.0 ± 8.1 3.2 5 47.4±9.8*---4.4* These shrubs have not grown much taller, but they have spread out Quz m- the 1997 growing season. Three transects were established to determine cover of herbs (Photos 23 zo 27). The sedges had grown well, though leaves were smaller than those measured in spring= The spring leaves were hold-overs from the plants grown in pots and planted late in Autumn_ .1996. There has been substantial natural invasion, providing good cover throughout this area. T_ntal cover in these transects was over 90%. Herbs included two rushes, water parsley, and anther sedge. Table 5 summarizes cover for sedges along the three transects. 5 Table 5. Summary of transect data. Transect I was 6 m long, Transect II was 10 m long, and transect III was 8 m long. Transect I Transect II Transect III Spring-97 Autumn-97 Spring-97 Autumn-97 Spring-97 Autumn-97 Species % Cover % Cover % Cover % Cover % Cover % Cover Slough sedge 7.1 ± 4.2 9.2±9.0 4.6 ± 3.5 7.3±4.0 4.8 ± 2.8 5.7±3.0 Recommendations: Continue monitoring shrubs for height and mortality. Discam=inue monitoring for soil moisture and herb cover. The wetland appears to have become estabEmmined, though a considerable portion of its success is due to natural invasion of willows and Eton woods. Enhancement Area D This site was enhanced with 2 red cedars, 7 salmonberries and 2 lady ferns. Theme �Sve grown so well that it is difficult to determine which were planted, and which are the naturaF-_-spe- cies. No further monitoring is planned for this area, and no photos were taken. Recommendation: Discontinue monitoring, since it is not impossible to distingui=the planted individuals from the naturally occurring ones. The site is filled in nicely. Buffer Area Results Detention Area The slopes of the detention pond are within the buffer of Wetland C, which is �—mite. The detention pond slopes are now covered with grass, clover, dense snow berry, roses ,= the lower slopes, 4 ft Douglas fir, and a variety of desirable invaders, including black cottomv;-.70od. The lower slope also has salmonberry in the former wetland creation area that is nar mow considered to be wetland. Other plants, including some willows, are surviving in this am` -and may contribute to the buffering for adjacent vegetation. In addition to desirable invader- mere are scattered Scot's broom and some Himalayan blackberry. Plot A is documented by Photos 28 to 31. Plot B is documented by Photos 32, 33, -_Nand 36. Table 6 summarizes the monitoring results. Table 6. Summary for Detention Pond buffers. Douglas firs are the middle row plants. Spring-97 Autumn-97 Species N Height ± s.d. Spread N Height ± s.d. Spread; Douglas fir (total) 27 59.9 ± 8.3 --- 19 70.3±14.7* ---- Snowberry—A 52 29.4 ±7.5 3.6 52 35.6±6.7* 14.1 Snowberry—B 28 27.1±6.8 3.1 j 26 35.5±5.7* 14.0* Nootka rose—B 11 28.4±9.6 3.0 1 11 44.7±9.9* 15.5* 6 Surviving Douglas fir have grown well, but height growth has not accelerated. Both scrub species have increased in height to a moderate degree, and filled out significantly. Mortality on this plot is concentrated on the Douglas firs. Of the 90 individuals planted in Autumn, 1996, 27 have died. A total of 18 snowberries have died, but this leaves over 300 plants surviving, which is more than the specified number. No roses were found dead. Recommendations: Plant 30 4 ft sized Douglas fir to replace the lost individuals. Replacements should be off -set by several feet from the dead plants and slightly lower on the slope. Plants for the top row should be planted several feet lower on the slope and avoid rocky areas. The spread of the shrubs should no longer be monitored. Height and mortality should continue to be monitored. Buffer I This buffer was planted in October 1996. Because the wetland for which it was a buffer has been moved, and the overstory destroyed, this buffer vegetation has been placed along the lower slope of the bank along Military Road. This planting occurred in two parts: the lower slope of the bank was planted with 50 Douglas fir in two rows and 138 snowberries. The remaining species were located on more level terrain, but were not part of the Buffer III exten- sion. The slope was monitored by measuring every fifth plant. The plot is 30 by 50 and located below the slope. The Douglas firs were of two sizes, larger ones being planted in the upper row, smaller ones in the lower row. The snowberry plants were between the two rows. Photos 37 and 38 show the Douglas firs on the slopes, and Photos 39 to 42 show the monitoring plot. Table 7 and Table 8 summarize the results of monitoring. The slopes are well vegetated, a result of the hydroseeding that occurred when the Douglas fir was planted. The gentle slope and flat area is also well vegetated. Table 7. Summary for Buffer I--transect Spring-97 Autumn-97 Species n Height ± s.d. Spread n Height ± s.d. Spread Douglas fir 12 38.5±12.9 ---- 2 52±18.4 --- Snowberry 5 19.0 ± 6.4 2.65 5 34±5.6* 19.0* Table 8. Summary of monitoring plot data, Buffer I. Spring-97 Autumn-97 Species n Height ± s.d. Spread n Height ± s.d. Spread Snowberry 34 19.3 ±7.7 2.6 34 26.9±7.7* 8.7* Red cedar 4 20.0 ± 5.9 2.2 4 26.5 ± 11.0 --- Osoberry 1 12 1 1 15 --- 7 Mortality of Douglas fir on the slope was heavy. Of the 53 plammd trees, 31 had died. The smaller trees also suffered high mortality. Only one of the snowberrie5s had died. The shrubs in the monitoring plot survived well and have grown significantly. Red cedar is growing slowly and osoberry appears stressed. Recommendations: Replace all dead Douglas firs with 4 ft tall piiants. They should be planted adjacent to the dead individuals, slightly lower on the slope. Monirmring should convx::ine in these plots. In order to hedge against further losses in the flat area, 10 aadditional 4 ft DougTw firs should be planted in this part of the buffer. Buffer II Buffer II is a small area leading from the sewer line up to Military !Road. Within 100 ft of the wetland, it was revegetated according to plan, with modifications (Tainle 9). Photos 43 to 46 show this plot. The vegetation on the sewer line remains sparse. Note that sewer rights of way were installed prior to buffer vege--zation installation_ amd that the monitoring plot markers are in areas not expected to be traversed_ Table 9. Summary for Buffer II. SprinE!-97 Autuma 97 Species n Height ± s.d. Spread n Height Spread Western hemlock 5 20.2 ± 5.6 1.6 2 22.0±1. -4 --- Snowberry 12 24.6 ± 6.0 2.5 12 30.5±6_3 2.5 Red elderberry 1 38 ± 0 3 1 43 15 Sword fern 8 #= 2.6 ± 0.9 13.5 4 5.3± 4.5 Hemlocks and ferns have been stressed on this site. Other plate are growing slow--T. No species has yet met its performance standard and several species ale suffering excessE-Ve mortality. Recommendations: The hemlocks should be replaced by 10 -L ft. tall Douglas frs, planted on the margins of the ROW. The four dead ferns should be replatzed with six ferns and planted in small depressions. Buffer III Buffer III is monitored by three narrow plots, two aligned on the :west side of the access road, and one on the east. They are not in that portion of the gravel roam, which was instaFIerd prior to plantings, that might be trampled or destroyed by heavy equipment. Photos for tlj=-:se plots are shown as Photos 47- to 52. Table 10 summarizes the results of finis monitoring. 8 Table 10. Summary for Buffer III. Spring-97 Autumn-97 Transect I Transect I Species n Height ± s.d Spread n Height ± s.d. Spread Douglas fir 10 23.8 ± 18.1 1.6 6 29±3.6 ---- 'Western hemlock 10 30.0 ± 14.5 4.2 6 34.0±12.2 ---- iDsoberry 4 11.2 ± 1.7 1 0 Snowberry 9 24.8 ± 4.2 3.2 9 33.7±7.9* 20.1 Salmonberry 3 13.0 ± 1.0 1 3 19.6±12.6 19* Sword fern 9 n=7±2.5 8.0 9 9.2±1.7 7.6 Sprine-97 Autumn-97 Transect II Species n Height ± s.d Spread n Height ± s.d. Spread Eked cedar 4 43.7 ± 15.1 4.7 4 52.2±22.0 --- Red elderberry 2 7.0 ± 7 1 2 7±7 2 'Willows 1 35 2 1 45 6 Snowberry 8 32.2 ± 6.9 3.5 7 37.3±5.6 22* Salmonberry 2 30.0 ±2.8 4 1 67 50 Sword fern 8 n=4.8 ±4.0 12 4 7.3±0.6* 4.7 Surine-97 Autumn-97 Transect III Species n Height ± s.d. Spread n Height ± s.d. Spread Douglas fir 2 20.0 ± 2.8 1.5 0 'Western hemlock 5 44.0 ± 14.8 6.4 0 Snowberry 8 24.2 ± 7.4 3.2 6 25.2±6.4 6.3 Salmonberry 2 9.5 ± 0.7 1 0 .Sword fern 6 n=3 ± 1.3 15.1 3 1 7.3±.6* 4.7±.5* Conifers continue to have a difficult time in the drier parts of this mitigation area (Transects I and III). Snowberry has grown significantly both vertically and horizontally, and salmonberry has spread out from its dormant state. Sword fern is hanging on in places. Transect III was particularly hard-hit. It appears to have suffered from considerable invasion by weeds and from casual disturbance. Overall, this buffer is being invaded substantially by native vegetation, as well as by weeds along Transect III. The total cover is relatively high. Recommendations: Some of the plantings should be replaced to cover losses that have occurred. In transect A, conifer losses should be replaced by 20 Douglas firs. Osoberry should 7 be replaced by 5 snowberries. Plot B is densely vegetated. Plantings are sufficisently successful that, combined with the natural invasion, no further plantings of shrubs should oaccur. However, 5 sword ferns should be planted to replace losses. Plot C has lost most of the veegetation due to invasive plants. The site should be amended with bark to reduce drought stressz. Weeds should be cut back and 10 Douglas firs and 10 snowberries should be planted to replace-ldosses. Buffer IV This road was installed prior to plantings. Trees and tall shrubs are piaanted along the margins of the road. Small plants are in the center. It does not appear that this aarea will be used for maintenance. These plantings appear healthy (Photos 56-59; Table 11). Winter storrm dropped alder on to some of these plantings, damaging them. These damaged plants appear too have survived. There has been considerable natural invasion by red alder and grasses. In some palaces, plantings were obscured. Ferns, especially, may have been missed in the dense vegetation In Transect A, growth is relatively good. However, the deciduous tall =shrubs have not survived, and two hemlocks outside the plot have died. Snowberry is a reliable-- species in this site and Douglas fir is growing well. In Transect B, over all growth is relatively good, despite the losses hemicocks outside the monitoring plot. However, the deciduous tall shrubs have not survived. Table 11. Summary of installation for Buffer IV. Transect A -Spring 97 Autumn--97 Species n Height ± s.d Spread n 111eight ± s.d Spread Douglas fir 5 16.8 ± 3.0 1.8 4 26.0±2.5* --- 'Western hemlock 6 44.6 ± 15.1 7.3 6 52.0±2.9 --- Osoberry 2 16 ± 0 1 0 Snowberry 9 24.7 ± 4.5 3.0 9 38.6±5.5* 23.9* Red elderberry 5 13.0 ± 3.7 1 0 Sword fern (height =number) 5 11.2 ± 8.5 10.8 5 9.0±1.2 10.2 Transect B-Spring-97 Autumn-97 Species n Height ± s.d Spread n 111eight ± s.d Spread Douglas fir 5 19.4 ± 2.6 1.8 4 1 24.0±11.9 --- 'Western hemlock 6 45.3 ± 16.4 7.3 2 58.0±8.5 --- Osoberry 2 16 ± 0 1 0 f Snowberry 7 28.9 ± 4.7 3.7 7 36.9±10.6 22* :Red elderberry 3 13.0 ± 3.7 1 0 ;Sword fern (height =number) 12 4.6±2.2 16.8 11 9.0±2.1 * 12.9 10 Recommendations: The lost hemlocks should be replaced by planting 10 Douglas ors; the lost tall shrubs should be replaced by 20 snowberries in the more open areas. In addition, natural invasion of red alder should be encouraged by scarifying the surfmce of the ROW. Buffer V Buffer V was planted in spring 1997 and was not measured at that time. This sit - is located above Buffer III and is of concern because it is within 100 ft of Wetland 7. The plantings are healthy and robust. However, western hemlock has suffered 40% mortality. Table 12. Summary of installation for Buffer V. Autumn-97 Species N planted n Height ± s.d. Spread Western hemlock 10 6 68.7±8.3 --- Red elderberry 9 8 28.8±8.8 16.0±7.7 Snowberry 10 9 36.9±6.9 19.7±10.9 Recommendations: This section should be planted with 5 Douglas firs and 3 snowber- ries to complete the restoration. Mortality Summary The mortality in each planting area, which includes losses within monitoring plots and for the entire area, is summarized in Table 13. The percent survival column is based on the as-buult number. The survival standard is 80%. Table 13. Summary of mortality by area. Determined by counts of dead plants. Site, Species Specified Number As -Built Number Number Dead Survivors Perceatt Survivail WEA-A Red cedar Salmonberry Dogwood Willow Lade fern 10 16 0 16 100% 15 31 1 30 97% 0 3 2 1 33% 30 37 2 35 95% 20 19 3 16 1 84% 11 WL-4 Red cedar Salmonberry Willow Lady fern 10 17 7 10 59% 21 60 47 13 712% 30 30 7 23 77% 21 25 16 9 36% WL-5 Salmonberry Dogwood Willow Lady fern 20 55 21 34 662% 0 6 0 6 I DO%* 16 58 6 52 °90% 24 3 3 0 T% WL-7 Red cedar Willow Lady fern Skunk cabbage 0 2 0 2 D-00% 15 11 0 11 E00% 20 0 0 0 -- 20 22 0 22 D.00% WL-8 Dogwood Willow Graminoids 63 19 0 19 11.00% 63 144 0 144 LIDO% 360 348 --- --- -- Detention Buffer Douglas fir Snowberry Nootka Rose 90 90 31 59 665% 300 324 18 306 a94% 75 75 0 75 1-1 00% Buffer I Douglas fir Red cedar Snowberry Osoberry 23 53 31 22 -42% 26 26 1 25 9.96% 52 308 2 306 °99% 0 5 5 0 ID%* Buffer II Red cedar Western hemlock Snowberry Red elderberry Sword fern 8 0 0 0 --- 0 8 6 2 :25% 17 17 0 17 L 00% 5 1 1 1 D 00% 17 17 7 10 5 9% 12 Buffer III Douglas fir Red cedar Western hemlock Snowberry Osoberry Red elderberry Salmonberry Willows Sword fern 0 31 18 13 42% 12 24 10 14 58% 64 50 35 15 30% 100 98 20 78 79% 12 10 10? 0 0% 5 20 20? 0 0% 0 39 29 10 25%* 0 6 0 6 100%* 88 85 67 18 21 * Buffer IV Douglas fir Western hemlock Snowberry Osoberry Red elderberry Sword fern 0 19 1 18 95%* 25 24 10 14 56% 36 42 7 35 83% 8 10 10 0 0% 8 7 7 0 0% 50 51 6 .45 88% Buffer V Western hemlock Snowberry Red elderberry 10 10 4 6 60% 10 10 1 9 90% 9 9 1 8 89% Survival in WEA-A is adequate. Three red -twig dogwoods were planted after initial specifications, and only one has survived. Total cover is excellent and there are many more planted individuals that was specified. This area is moderately successful. WL-4 suffered significant mortality as a result of road clearing activities. More red cedar and salmonberry had been planted, but most of the species are below the survival standard. In addition, the area of wetland is smaller than in Spring, and the wetland hydrology is problematic. WL-5 appears to be meeting the survival standard. However, this is a false view. The eastern portion of the planted area has very low survival (Plot A), and the high percentages are only because many more plants were installed that were specified. In particular, lady fern may not be capable of growing in this site. WL-7 is functioning adequately. All willows are surviving. They are outside the technical limits of this wetland and therefore are not part of the performance standard. They will, however, help to maintain the wetland conditions for the skunk cabbage. Lady ferns were never planted in this site since they were planned for the drier portion of the wetland that is now not part of the creation area. 13 WL-8 is functioning well, albeit with a significant assist from natural recolonization. Due to a planting error, only 19 red -twig dogwoods were planted. However, more than twice the specified number of willows were planted. Total survival is greater than 100% based on the specifications. Herb cover is high, but it is very difficult to determine numbers of surviving planted herbs. Mortality was high due to goose grazing. The survival of Douglas fir on the detention buffer is below the standard. The other species have survived in excess of the recommendations. Buffer I Douglas fir mortality is high. Many more were planted than specified, but the specifications were based on conditions that were altered after the plans were devised. Therefore, Douglas fir mortality is to be replaced. Buffer II is drier than anticipated. Hemlocks and elderberries, as well as sword fern, are not meeting the standard. Buffer III, particularly the drier west side of the buffer, is not successful. Planting recommendations are made. below. Buffer IV is more successful than III, but requires some further attention, as described Buffer V requires the addition of several Douglas fir to compensate for losses in hemlock. Below I summarize recommendations that combine mine with those of the City's consultant. Summary of Recommendations 1. DEA - A. This site should be monitored only for mortality in the future. The individual species have met height and cover goals. Minor alterations in the hydrology recommended in Spring, 1997, were effected and effective. 2. Wetland Creation Area 4. The engineer should provide adequate hydrology for this area. The plants destroyed by road clearing should be replaced. Replacements should concentrate on willows, which are thriving on this site. 50 Scouler's willows and 10 salmonberries should be used to replace the losses. Plantings should be undertaken further downhill towards the pond. The water can be taken from the lower portion of Wetland Creation Area 7 without damage to that wetland. However, if that is not feasible, then Creation Area 4 should be contoured by hand to help retain water. After planting replacement shrubs, bark should be used as a mulch. These recommendations reiterate those made in Spring, 1997. 14 3. Wetland Creation Area 5. Plot A requires hydrological alterations as recommended in the Spring report. The northern portion of this wetland should be modified to improve wetland hydrology. In addition, 15 lady ferns should be planted as shown on plan. To replace losses, 30 Scouler's willows should be planted within the area. Plot B has grown very well and there has been no mortality. Further monitoring should be confined to determining mortality. 4. Wetland Creation Area 7. This site has established well. No further monitoring should be required. Water will not be diverted from this wetland area, except from the point from which it leaves the wetland. At present, this water flows to help support Wetland Creation Areas 5 and WEA-A, so care is required not to divert all water. 5. Wetland Creation Area 8. Continue monitoring shrubs for height and mortality. Dis- continue monitoring cover, for soil moisture and herb cover. The wetland appears to have become established, though a considerable portion of its success is due to natural invasion of willows and cottonwoods. Bark should not be added to this wetland. 6. Enhancement Area D. Discontinue monitoring. The City's consultant recommends continued monitoring, but this would not now be practical. The planted individuals cannot with certainty be identified. 7. Detention Pond Buffer. Plant 31 4 ft sized Douglas fir to replace the lost individuals. Replacements should be off -set by several feet from the dead plants. Plants for the top row should be planted lower on the slope. Plant 20 snowberries to replace losses. The spread of the shrubs should no longer be monitored. Height and mortality should continue to be monitored. 8. Buffer I. Replace the 31 dead Douglas firs with 4 ft tall plants. They should be planted adjacent to the dead individuals, slightly lower on the slope. Monitoring should continue in these plots. Plant 10 snowberries near the base of the slope to replace losses of other shrubs. 9. Buffer II. The hemlocks should be replaced by six (6) 4 ft. tall Douglas firs. The seven dead ferns should be replaced and planted in small depressions. 10. Buffer III. These buffers are being invaded substantially by native vegetation that is achieving a dense total cover. However, some of the plantings should be replaced. In transect A, conifer losses should be replaced by 20 Douglas firs. Osoberry should be replaced by 5 snowberries. Plot B is densely vegetated. Plantings are sufficiently successful that, combined with the natural invasion, no further plantings should occur. Plot C has lost most of the vegetation due to invasive plants. The site should be amended with the planting of 10 snowberries, which are doing moderately well. 11. Buffer IV. The lost hemlocks should be replaced by planting 10 Douglas firs; the lost tall shrubs should be replaced by 20 snowberries in the more open areas. 15 12. Buffer V. This section should be planted with 5 Douglas firs and 3 snowberries to complete the restoration. 13. Scotch broom in the detention buffer should be pulled to prevent its competitive effects. Himalayan blackberry should be cut back to reduce its invasion. 14. There are several continuing problems associated with this project that should be addressed by an "action plan" to be prepared in conjunction with your engineer. In addition to the detention pond buffer, Wetland Areas 4 and 5 and Buffer Area I may require substantial attention. The implementation of the plan may occur as late as February, 1998. However, the plantings recommended in this report should, if approved by the City, be implemented as soon as is practicable. The recommended plantings are summarized in Appendix II, arranged by area. Please feel free to contact me concerning any questions. This report supersedes the report dated October 4, 1997. Sincerely, I o Y,44, A-lz�rl-d r. Roger del Moral Professor 16 Appendix II. Summary of New Plant Material Recommended Location Species Number Wetland Creation Area 4 Salix scouleriana (Scouler's willow) 50 Rubus s ectabilis (salmonberr) 10 Wetland Creation Area 5 Salix scouleriana (Scouler's willow) 30 Ath rium filix-femina (lady fern 15 Buffer Area Detention Pond Pseudotsu a menziesii (Douglas fir) 30 Buffer Area I Pseudotsu a menziesii (Douglas fir) 41 Sym horicar os albus (snowberr) 10 Buffer Area II Pseudotsu a menziesii (Douglas fir) 10 Pol stichum munitum (sword fern) 6 Buffer Area III -A Pseudotsu a menziesii (Douglas fir) 20 Sym horicar os albus (snowber 5 Buffer Area III-B Pol stichum munitum (sword fern) 5 Buffer Area HT Pseudotsu a menziesii (Douglas fir 10 Sym horicar os albus (snowberr 10 Buffer Area IV Pseudotsu a menziesii (Douglas fir 10 S m horicar os albus (snowberry) 20 Buffer Area V Pseudotsu a menziesii (Douglas fir) 5 Sym horicarpos albus (snowberr) 3 18 23 September 1997 Jim Harris City of Federal Way 33530 First Way South Federal Way, Washington 98003 Re: Heritage Woods Spring 1997 Monitoring Dear Jim, ADOLFSON ASSOCIATES, INC. At the request of the City of Federal Way, Adolfson Associates Inc. (AAI) has reviewed the Spring 1997 monitoring conducted by Del Moral and Associates at the Heritage Woods subdivision in Federal Way, Washington. AAI has reviewed the monitoring report and conducted a field visit on 4 September 1997 to compare site conditions to those described in the monitoring report. This letter contains comments on the monitoring methods, the monitoring report, and the overall site conditions at Heritage Woods. - Monitoring Methods The goal of conducting mitigation site monitoring is to be able to collect data which relates to the standards of success. This enables you to conclude whether the site is successful or unsuccessful at the end of the monitoring session. For this project, the standards of success are as follows: 1) 80 percent vegetative cover; 2) 80 percent survival of the installed plant materials; 3) a 50 percent increase in height for the installed trees; 4) ferns should increase 50 percent in cover and number of fronds; 5) establish 22,825 square feet of wetland. The following protocols were used in the Spring 1997 monitoring: stem counts, plant height, plant mean spread, and percent cover. Stem counts were conducted within each monitoring plot, but they were not compared to the as - built to calculate the percent survival of the installed plants. The calculation of percent survival is necessary in order to assess whether supplemental plantings will be needed to meet the 80 percent survival standard of success. Measuring tree height will assess the third standard of success, but plant mean width does not relate to any of the standards of success. Percent cover was only estimated for one monitoring plot. If percent cover data is not collected it is difficult to determine whether the site is progressing towards meeting the standards for success. Monitoring Report The monitoring report was received by the City approximately five months following the spring monitoring. This does not allow time for the City to review this report before the next monitoring visit is conducted. Also, overall site conditions were not accurately portrayed in the monitoring report. The fact that the sewer access roads were put through mitigation areas and plots is worth mentioning to help the reader get an overall picture of the site Q p�and because it affects the monitoring results. Finally, submitting a stack S E P 2 4 199 Environmental Analysis 5309 Shilshole Ave. NW Seattle, TVA 98107 adolfson@adolfson.com (206) 789-9658 FAX (206) 789-9684 �� Jim Harris/Heritage Woods Page 2 9123197 and the photos are so close up that it does not allow the viewer to get an overall picture of the conditions of each mitigation area during the monitoring visit. Site Conditions The majority of the site does not appear to be progressing towards meeting the standards of success. Only one of the wetland creation areas appeared to be progressing well, Wetland Creation Area 8, and its success is primarily due to recruited vegetation rather than installed plants. During the site visit, Wetland Area #5 appeared particularly dry, even for this time of year. Also, the plantings on the north slope of the detention pond appeared dry and stressed. Another observation made during the site visit was that there was a significant amount of sediment which appeared to be recently deposited into the existing pond. It appears that an old culvert that emptied into this pond was blocked and the sediment is entering the pond through a recently installed culvert. Recommendations We have the following recommendations based on the Spring 'l997 monitoring report. • Enhancement Areas D and 4 should continue to be monitored; the monitoring report suggested that these areas no longer be monitored. • Bark should not be placed in Wetland Creation Area 8 because it is re -vegetating well with recruits and should not be disturbed. • We concur with the recommendations made for Wetland Areas 1, 4, 5, and DEA-1. However, water diversion from Wetland 7 to Wetland Creation Area 4 should be done only to the .extent that it does not have a negative effect on Wetland 7. • Scot's broom should be removed by hand from the planted area north of the detention pond. We would like to make the following additional recommendations: • In future monitoring reports, the stem counts should be compared to the as -built to calculate the percent survival of the installed plants. • Future mitigation efforts should concentrate on methods which will relate to the standards of success such as percent cover rather than mean plant width. • The monitoring plots may need to be relocated so that they are not on the sewer access roads. The city should receive the monitoring report in less than two months following the monitoring visit. • Future monitoring reports should submit the photos as color photo copies with more than one photo per page and a description of each photo as a caption. Also, please re-establish photo points to approximately ten photos which show an overview of each area. ■ Future monitoring reports should attempt to be consistent with the names of wetlands as they correspond to the map. For example, do not cross reference Wetland Area 4 with Wetland Area IV and DEA-A with DEA-1. Jim Harris/Heritage Woods Page 3 9123197 Monitoring reports should mention overall site conditions, not just present numbers and data collected. • A sediment removal system should be installed above the culvert that empties into the existing pond. Also, the sediment load recently deposited by the new culvert should be excavated, but sediment excavation should occur without disruption to the existing wetland and only in the close proximity of the culvert. The method for sediment removal should be approved by the city. • Finally, we recommend that an action plan be developed this winter to improve the success of the plantings north of the detention pond. This plan may include such actions as watering the plantings, adding soil amendments, re -grading the areas, re -planting with different species, or installing supplemental plantings. This plan should also address the above recommendations. This plan should be approved and implemented prior to the Spring 1998 monitoring. In summary, substantial corrective actions are necessary at this time in order to achieve the standards of success in five years. Fortunately, we are early in the monitoring process so there is plenty of time to make these corrections: We are pleased to have the opportunity to prepare this document for you. If you have any questions, please feel free to contact Andy or me at 789-9658. Thank you. Sincerely, ADOLFSON ASSOCIATES INC. Jennifer Goodridge Staff Biologist CITY OF k- 33530 1ST WAY SOUTH October 13, 1997 David Morrison Parklane Ventures 31620 23rd Avenue South #320 Federal Way, WA 98003 (206)661-4000 FEDERAL WAY, WA 98003-6210 RE: Heritage Woods Wetland Monitoring, First Event - File No. SUB92-0005 Dear Mr. Morrison: Attached is a copy of the September 23, 1997 Adolphson Associates Inc. (AAI), review and recommendations of the Heritage Woods Spring 1997 wetland monitoring report by Roger delMoral. At this time you must implement the 13 recommendations contained in the bullet points of the September 23, 1997 AAI letter. Some of the recommendations are substantive changes to the wetland planting and mitigation program, while other recommendations are procedural in regard to the report format and content. The AAI review also requires developing an action plan for the city's review, to improve the success of plantings near the detention pond. At this time, please provide the second monitoring report for 1997 which meets the formatting standards outlined in the AAI review. The fall monitoring must also discuss implementation of the AAI recommendations. The fall 1997 monitoring report needs to be provided as soon as possible so the design and review biologists have the opportunity to view the field conditions prior to the dormant winter conditions. If you feel it would be helpful to have Mr. delMoral discuss the specific AAI recommendations with the reviewer, please have him call Jennifer Goodridge directly at (206)789-9658. Please contact me at (253)661-4019 if you have any questions. Sincerely, ull Harris Associate Planner L:\PRMSYS\DOCUMENTSUB92-00.05\CD101397.DOC C: Jennifer Goodridge, AAI 5309 Shilshole Avenue NW, Seattle, WA 98107 23 September 1997 ? Jim Hams, City of Federal Way 33530 First Way South Federal,Way, Washington 98003 Re: Heritage Woods Spring 1997 Monitoring Dear. Jim, At the request of the City of Federal Way, Adolfson Associates Inc. (AAI) has reviewed the Spring 1997 monitoring conducted by Del Moral and Associates-at.the Heritage Woods subdivision in Federal Way, Washington. AAI has reviewed the monitoring report; and conducted a field visit on 4 September 1997 to. compare site conditions to those described in the monitoring report. This letter contains comments on the monitoring methods, the monitoring report, and the overall site conditions at Heritage Woods. Monitoring Methods The goal of conducting mitigation site monitoring is to he able to collect data. which relates to the standards of success.. This enables you to conclude whether the site'is successful or unsuccessful at the end of the monitoring session. For this project, the standards of success are as follows: 1)- 80 percent vegetative cover;.2) 80 percent survival of the -installed plant:materials; 3)-a'50 percent increase in height for the installed trees; 4) ferns should increase 50 percent in cover and number of fronds; 5) establish 22,825 square feet of wetland. The following protocols were used in the Spring 1997 monitoring: stem counts, plant height, plant mean spread, and percent cover. Stem counts were conducted within each monitoring plot, but they were not compared to'the as - built to calculate the percent survival of the installed plants. _ The calculation of percent survival is necessary in order to assess whether supplemental plantings will be needed`to meet the.80 percent survival standard of success. Measuring tree height will assess the third standard, of success, but plant mean width does not relate to any of the standards of success. Percent cover was only estimated for one monitoring plot. If percent cover data is not collected it is difficult to determine whether the site is progressing towards meeting the standards for success: Monitoring Report The monitoring report was .received by the City approximately five months following the spring monitoring. This does not allow time for the City to review this report before the next monitoring visit is conducted. Also; overall site conditions were not accurately portrayed in the monitoring report. The fact that the sewer access roads were put through mitigation areas and plots is worth mentioning to help the reader get an overall picture of the site s and because it affects the monitoring results. Finally, submitting a stackjp�r��� e Environmental Analysis 5309 Shilshole Ave. NW Seattle, WA 98107 adolfson@adolfson.conz (206)789-9658 FAX (206)789-9684 to Jim Harris/Heritage Wood Page Z 9123197 . and -the photos are so close up that it does not allow the viewer to get -an overall picture of the ' conditions of each mitigation area during the monitoring visit. Site Conditions The majority of the site does not appear to be progressing towards meeting the standards of success. Only one of the wetland creation areas appeared to be progressing well,, Wetland Creation Area 8, and its success is primarily due to recruited vegetation rather than installed plants. During the site visit, Wetland Area #5 appeared particularly dry, even for this time of year. Also, the plantings on -the north slope of the -detention pond appeared dry and stressed._ Another observation made durin_ g the site visit was that there was a significant amount of sediment 'which appeared to be recently deposited into the existing pond. It appears that an old culvertthat-emptied into this pond was blocked and the sediment is entering the pond through a recently installed culvert. - Recommendations We have the following recommendations based on the Spring '1997 monitoring report. • Enhancement:Areas D and 4 should continue to be monitored; the monitoring report suggested that these areas.no longer be monitored. • Bark should not be placed in Wetland Creation Area 8 because it is re -vegetating well with recruits and should not be disturbed. • - We concur with the recommendations made for Wetland Areas I- 4, 5, and DEA-1. However, water diversion from Wetland.7 to Wetland Creation Area 4 should be done only to the .extent that it does not have a negative effect on Wetland.7. • Scot's broom should be removed by hand from the planted area north of the detention pond. We would like to make the following additional recommendations: • - In future monitoring reports, the stem counts should. be compared to the as -built to calculate the percent. -survival of the installed plants. ■ Future -mitigation efforts should -concentrate on methods which will relate to the standards of success such- as percent cover rather than mean plant width. The monitoring plots may need to be relocated so that they are. not on the sewer access roads. • The city should receive the monitoring report in less than two months following the monitoring visit. ■ Future monitoring reports should submit the photos as color photo copies with -more than one photo per page -and a description of each photo as a caption. Also, please re-establish photo points to approximately ten photos which show an overview of each area. ■ Future monitoring reports should attempt to be consistent with the names of wetlands as they correspond to the map. For example, do not cross reference Wetland Area 4 with Wetland Area IV and DEA-A with DEA-1. Jim Harris/Heritage Woods Page 3 9/23/97 - • Monitoring reports should mention overall site conditions, not jizst.present numbers and data collected. • A sediment removal system should be instaIIed above the culvert that empties into the existing pond. Also, the sediment.load recently deposited.by the new culvert should be excavated, but sediment excavation should occur without disruption to the existing wetland and only in the close proximity of the culvert. The method for sediment -removal should be approved by the city. ■ Finally, we recommend that an action plan be developed this.winter to improve the success of the plantings north of the detention pond. This plan may include such actions as watering the - plantings, adding soil -amendments, re -grading the areas, re -planting with different species, or. installing supplemental -plantings. This plan should also address the above recommendations. This plan should be approved and implemented prior to the Spring 1998 monitoring. In summary, substantial corrective actions are necessary at this time in order to achieve the standards of success in -five years. Fortunately, we are early in the monitoring process so there is plenty of time to make these corrections. We are pleased to have the- opportunity to prepare .this document for -you. If you have any questions; please:feel free to contact -Andy or me at.789-9658. Thank you. Sincerely; ADOLFSON ASSOCIATES INC. Jennifer Goodridge Staff Biologist CI 1�0 F � (206) 661-4000 33530 1ST WAY SOUTH FEDERAL WAY, WA 98003-6210 August 25, 1997 ; r� Adolphson And Associates Any Castelle 5309 Shilshole NW Seattle, WA 98107 RE: Heritage Woods First Wetland Monitoring Event Dear Andy: Attached is a copy of the first monitoring report for the Heritage Woods preliminary plat. Your firm will be conducting the review of the wetland monitoring reports for five years. Since Keith Fabing is no longer with your firm, I understand that you will assign a new biologist to this project. I would be glad to discuss the project history with the new contact from your office. For your convenience, I have attached a copy of your January 28, 1997 letter outlining AAI's cost estimate for review of the five years of monitoring events. Your estimate for the first year monitoring is $1,250.00. Therefore, the review cost of this monitoring event should not expend more than $625.00, unless you anticipate the second monitoring event of 1997 being a more abbreviated review. Please sign and return a copy of the enclosed authorization form before initiating your project review. For your convenience I have included the following information relating to the Heritage Woods project: • Spring 1997 Monitoring report by delMoral & Associates dated March 18, 1997 and received by the City of Federal Way on August 14, 1997. • Labeled photographs from March 18, 1997 monitoring event. • As -built Documentation Heritage Woods Wetland Creation and Buffer Enhancement Report by delMoral and Associates dated December 9, 1996 and received by City of Federal Way January 27, 1997 (with plan sheets W-1 and W-2). • October 23, 1995 Final Wetland Creation and Buffer Enhancement Plan Heritage Woods, by delMoral and Associates. 0 Letter from delMoral and Associates dated August 12, 1997 regarding status of pond. Andy Castelle August 25, 1997 Page 2 Pages 19 - 21 of the October 23, 1995 Final Wetland Creation and Buffer Enhancement Plan outlined monitoring standards and requirements for this project. The submitted wetland monitoring report should be checked for consistency with the standards developed in the 1995 report. The separate letter regarding the pond status is in regard to whether or not the pond shall be dredged to remove sediment accumulation. Please also review the pond status letter and provide a brief recommendation regarding the pond dredging. I have informed the developer that it is essential to provide monitoring reports in a timely manner, (as we received this monitoring report five months after it was developed). In order for your firm to provide an efficient review within the estimated budget, for the remaining wetland monitoring events, I recommend that the developer shall provide monitoring reports to the city within one week of the report date. Hopefully you can complete your review within two weeks of signing the authorization form. Call me at 661-4019 if you need anything else. Sincerely, 9�'ovl) 3i arms Associate Planner C: David Morrison I:hwoods\aailetter del Moral & Associates AUG 14 2002-42nd Ave. East Seattle, WA 98112 (206) 323-7106 FAX (206) 328-9050 March 18, 1997 Spring 1997 Monitoring —Heritage Woods Mr. David Morrison Park Lane Executive Center 31620 - 23rd Ave. So. Federal Way, WA 98003 Dear Mr. Morrison: This letter summarizes the monitoring of plantings undertaken at the Heritage Woods site in order to develop compensatory wetlands and restore buffers. Monitoring was accomplished on March 14, 1997. For each area, a table is provided, showing the number sampled, the mean and standard deviation of the height and the mean spread of woody species, and the number of fronds of ferns. The total number of plants is less than that planted since the monitoring plots do not include all plantings. In general, the following procedures were followed: the height of all woody plants within a plot was measured directly from ground to the tip of longest shoot (in inches). The spread was determined using a quadrat frame divided into squares 20 cm (about 8 inches) on a side. The number of squares is to be used to determine cover of plants. For the herbs in Wetland 8, the percent cover was estimated along three transects, reported separately. The planted species and all other species were recorded separately. New monitoring plots were installed in Buffer #1, Buffer #2, Wetland 5, and Wetland 8. All plants in Wetland 7 were counted. Details are provided under each area. Photos were taken from the corners of monitoring plots and from selected other locations, as discussed below. A copy of each photo is enclosed. I retain a second copy and the negatives for future reference. Wetland Creation Area 41 This area is not considered a wetland. The plants were generally successful, and will improve the condition of the detention pond buffer. The number of surviving plants will be determined during the September monitoring. Wetland Creation Area DEA-1 Table 1 summarizes the situation for this wetland area. Photos 1 to 4 are provided for documentation. Table 1. Summary for Creation Area DEA-1. Species n Height ± s.d. Mean spread Red cedar 10 27.3 ± 6.1 3.1 Willows 20 39.0 ± 18.3 8.0 Salmonberry 14 22 ± 6.2 3.1 ERedy-twig dogwood 1 27d fern dormant I --- The hydrology of this area needs to be adjusted by minor alteration of the surface. Most of the wetland is saturated, but the upper slopes are not. Water that is currently flowing along the road should be redirected into this wetland area. Should this not be undertaken, the area of wetland will shrink. Wetland Creation Area 4 Table 2 summarizes all the plants installed in this area, as no permanent plot was established. All plants within the area were measured. The spread of ferns is the number of fronds. Non -wetland plants were not measured. Photos 5 to 7 show this site. Table 2. Summary for Creation Area 4 Species n Height ± s.d. Mean spread Red cedar 15 34.8 ± 7.1 2.8 Willows 23 37.0 ± 15.5 2.6 Salmonberry 28 17.1 ±.8.9 1.5 Lady fern (spread = fronds) 16 2.3 ± 0.8 6.6 Most of this area is not saturated, though a small area on the northern end is saturated. The road has been disturbed to cut off drainage to this wetland area. The drainage can be reestablished by small hand -dug ditches and minor soil movement along the upper portion of this wetland. It is further recommended that stockpiled bark be spread over this area to reduce siltation and improve the surface hydrology. Wetland Creation Area S This wetland area occurs in two sections. There is adequate hydrology, but water should be redirected to better cover the wetland areas. This should involve opening up the ditch in two more locations to provide water to the wetland planted in the north-west part of the site. In addition, bark should be spread out over the entire wetland and buffer area. There are two wetland monitoring areas (Table 3). WL-5A (Photos 9-12) is further north, while WL-5B is on the south (Photos 13-16), and is associated with the swale. Table 3. Summary for Creation Area 5 PLOT A PLOT B Species n Height ± s.d. Spread n Height ± s.d. Spread Pacific Willow --- --- --- 11 33.0 ± 9.8 --- Scouler's willow --- --- --- 21 73.4 ± 13.5 --- Willows 17 30.5 ± 4.8 2.4 --- --- --- Salmonberry 1 7 6.3 ± 1.1 1.9 11 9.1 ± 4.7 1.3 Lady fern dormant --- --- --- --- --- Red -twig dogwood 1 7 32.6 ± 6.3 2.3 --- --- Wetland Creation Area 7 This wetland was reduced in size to avoid impact to lots within 100 ft. The remaining area was planted to skunk cabbage in November, 1996. At least 20 skunk cabbage were noted and these were breaking dormancy. In order to avoid damage to this small area, no plot has been established, and no cover estimates were made. Success for this area will be determined by survival, easily determined from a short distance. The site was saturated and all plants were alive during this monitoring period (Photos 17 and 18). Wetland Creation Area 8 The creation site was saturated and had 2 to 6 inches of standing water within it. There was little to no additional mortality noted since November. The herbs appear to be growing, and have not been attacked by geese. Bark could be added to this area to help retain water during the summer. Two monitoring plots were established for shrubs (Table 4). Plot A (Photos 19-22) was 25 by 50 ft, and Plot B (Photos 23-26) was 25 by 45 ft. The data are summarized below: Table 4. Summary for Creation Area 8. PLOT A PLOT B Species n Height ± s.d. Spread n Height ± s.d. Spread Willows 33 42.5 ± 15.8 3.6 35 37.2 ± 11.1 2.7 Red -twig dogwood 4 31.0 ± 6.3 11.3 6 37.0 ± 8.1 3.2 3 Three transects were established to determine cover of herbs (Photos 27 to 29). The sedges were still dormant, though last year's leaves were still in place. In addition, there has been substantial natural invasion, providing good cover in this area. Table 5 summarizes cover along the three transects. Table 5. Summary of transect data. Transect I was 6 m long, Transect II was 10 in long, and transect III was 8 m long. Transect I Transect II Transect III Species % Cover % Cover % Cover Slough sedge 7.1 ± 4.2 4.6 ± 3.5 4.8 ± 2.8 Enhancement Area D This site was enhanced with 2 red cedars, 7 salmonberries and 2 lady ferns. They have grown so well that it is difficult to determine which were planted, and which are the natural species. No further monitoring is planned for this area, and no photos were taken. Buffer Area Results Detention Area The north and west slopes of the detention pond are within the buffer of Wetland C, off - site. The detention pond slopes are now covered with grass, clover, dense snow berry, roses on the lower slopes, 4 ft Douglas fir, and a variety of desirable invaders, including black cotton wood. The lower north slope has salmonberry in the wetland creation area that is not now considered to be wetland. Other plants, including some willows, are surviving in this area and may contribute to the buffering for adjacent vegetation. Plot A is documented by Photos 30 to 33, and the associated Douglas firs are shown in Photo 34. Plot B is documented by Photos 35 to 38, and the associated Douglas firs are shown in Photo 39. Table 6 summarizes the monitoring results. Table 6. Summary for Detention Pond buffers. Douglas firs are lumped. Plot A Plot B Species N Height ± s.d. Spread N Height ± s.d. Spread Douglas fir (total) 27 59.9 ± 8.3 n.d. -- --- --- Snowberry 52 29.4 ±7.5 3.6 28 27.1±6.8 3.1 Nootka rose -- -- -- 11 28.4±9.6 3.0 Buffer I This buffer was planted in October 1996. Because the wetland for which it was a buffer has been moved, and the overstory destroyed, this buffer vegetation has been placed along the 4 lower slope of the bank along Military Road. This planting occurred in two parts: the lower slope of the bank was planted with 50 Douglas fir in two rows and 138 snowberries. The remaining species were located on more level terrain, but were not part of the Buffer III extension. The slope was monitored by measuring every fifth plant. The plot is 30 by 50 and located below the slope. The Douglas firs were of two sizes, larger ones being planted in the upper row, smaller ones in the lower row. The snowberry plants were between the two rows. Photos 40 and 41 show the Douglas firs on the slopes, and Photos 42 to 45 show the monitoring plot. Table 7 and Table 8 summarize the results of monitoring. Table 7. Summary for Buffer I--transect Species n Height ± s.d. Spread Douglas fir 12 38.5±12.9 ---- Snowberry 5 19.0 ± 6.4 2.65 Table 8. Summary of monitoring plot data, Buffer I. Species n Height ± s.d. spread Snowberry 34 19.3 ±7.7 2.6 Red cedar 4 20.0 ± 5.9 2.2 Osoberry 1 12 1 Buffer II Buffer II is a small area leading from the sewer line up to Military Road. Within 100 ft of the wetland, it was revegetated according to plan, with modifications (Table 9). The monitoring plot included most, but not all of the plants introduced in November. Photos 46 to 49 show this plot. Table 9. Summary for Buffer II. Species n Height ± s.d. Spread Western hemlock 5 20.2 ± 5.6 1.6 Snowberry 12 24.6 ± 6.0 2.5 Red elderberry 1 38 ± 0 3 Sword fern 8 2.6 ± 0.9 13.5 Buffer III Buffer III is monitored by three narrow plots, two aligned on the south side of the access road, and one on the north. Photos for these plots are shown as Photos 50 to 55. Table 10 summarizes the results of this monitoring. 5 Table 10. Summary for Buffer II. Transect I Transect III Species n !Height ± s.d Spread n Height ± s.d Spread Douglas fir 10 23.8 ± 18.1 1.6 2 20.0 ± 2.8 1.5 'Western hemlock 10 30.0 ± 14.5 4.2 5 44.0 ± 14.8 6.4 {Osoberry 4 11.2 ± 1.7 1 --- Snowberry 9 24.8 ± 4.2 3.2 8 24.2 ± 7.4 3.2 ,Salmonberry 3 13.0 ± 1.0 1 2 9.5 ± 0.7 1 ;Sword fern --- 1 1 6 3 ± 1.3 15.1 I Table 10. Summary for Buffer III continued. Transect II Species n Height ± s.d Spread Red cedar 4 43.7 ± 15.1 4.7 Red elderberry 2 7.0 ± 7 1 Willows 1 35 2 Snowberry 8 32.2 ± 6.9 3.5 ,Salmonberry 2 30.0 ±2.8 4 Sword fern 8 4.8 ±4.0 12 Buffer IV These plantings appear healthy (Photos 56-59; Table 11). Winter storms dropped alder on to some of these plantings, damaging them. These damaged plants appear to have survived. Table 11. Summary of installation for -Buffer IV. Transect I Transect II Species n Height ± s.d Spread n Height ± s.d Spread Douglas fir 5 16.8 ± 3.0 1.8 5 19.4 ± 2.6 1.6 'Western hemlock 6 44.6 ± 15.1 7.3 7 45.2 ± 16.3 9.7 Osoberry 2 16 ± 0 1 1 16.0 1 Snowberry 9 24.7 ± 4.5 3.0 7 28.8 ± 4.7 3.7 Red elderberry 5 13.0 ± 3.7 1 1 11.0 1 Sword fern 5 11.2 ± 8.5 10.8 T 12 4.58 ± 2.2 16.8 Conclusions The enhancement area in Wetland 4 has developed nicely, and the plants have blended with existing vegetation. This area will no longer be monitored and is considered to have met its performance standard. There is no mortality and all plants are healthy. None of the wetland creation areas or buffer enhancement areas have reached the level of performance that would permit the termination of monitoring. However, there is little evident mortality. Since many plants had not yet leafed out, mortality was not determined in detail. The September monitoring will determine the levels of any mortality. Wetland Creation Area DEA-1 should be inspected by the engineer and minor alterations in the hydrology be installed. The modification should draw water that is flowing from WL-5, forming a channel, and distribute it along the upper (southern) portion of this wetland. In addition, bark should be spread over the upper portions of this wetland. Wetland Area IV has had its hydrology altered. The Engineer should have a channel cut across the road to provide water flowing form WL-7 to this wetland. In addition, minor surface modifications should be put in place to retain water longer in this wetland. After these modifications, bark should be added to reduce evaporation. Wetland Area V requires minor modifications of the surface hydrology. Water from the swale should be delivered to monitoring area A by cutting an additional gap in the berm. Bark should be spread over this area to reduce erosion and evaporation. Wetland Area VII is developing nicely and requires no additional work. Wetland Area VIII appears to have been established. There does not appear to be a problem from goose -grazing, and there is ample natural regeneration. I recommend that the shrub area be covered with bark to enhance the soil. The buffer areas are doing well. The slopes of Buffer area I may present problems if grasses do not establish well. Hydroseeding will be recommended in September if the area remains too barren. Scotch broom in the Detention buffer should be hand -pulled during routine maintenance. The modifications recommended are fine-tuning and should improve the chances of successful wetland establishment. They should be undertaken as soon as feasible as part of the maintenance program. If you have questions concerning this report, please contact me. Sincerely, 1� { Dr. Roger del Moral Professor 7 u8/12/97 10:01 FAX 206 685 1728 UW DEPT BOTANY 1@ 001/002 del Moral 8z Associates 2002-42nd Ave. East Seattle, WA 98112 (206) 323-7106 FAX (206) 328-9050 FACSIMILE TRANSMISSION -Hard olio Please call (206) 323-7106 if transmission is not clear Mr. David Morrison ParkLane Ventures 31620 - 23rd Ave. S. Federal Way, WA 98003 RE: Heritage Woods, Status of Pond Dear Mr. Morrison: Fax: (253) 946 3580 August 12, 1997 At your request, I inspected the vegetation now growing within the pond located in the wetland creation area adjacent to Wetlands 4 and 8. Over the last several years, the margins of the pond has silted in somewhat and has provided an opportunity for the invasion of desirable wetland plants. These plants are dominated by emergent wetland species such as cattails, toad rush, and several other semi -aquatic and aquatic species. I have not done a detailed inventory of these species, but it appears that water snu rtweed and floating -leaved pondweed may occur. These, other pondweeds, bur -reeds, pond -lily, and waterlilies may invade in time. Left free from disturbance such as dredging, the pond has the potential to develop a nice example of moderately deep to shallow marsh vegetation. This habitat is beginning to develop so as to support a variety of aquatic insect life, which in turn will help support birds in the vicinity. Nesting sites for water fowl may also develop. The water in this pond fluctuates seasonally and it is unlikely that the pond will be invaded by willows or other woody species. Therefore, the margins of the pond will present an emergent marsh wetland to complement the drier emergent wetland and scrub -shrub wetland developing on its shore. US/12/U'l 10:03 FAX 206 685 1728 UW DEPT BOTANY .1 IM002/002 The total volume of the pond has not shrunk significantly. 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Schneider Homes, Inc. 6510 Southcenter Blvd, Suite #1 Tukwila, WA 98188 ,.1 (206) 661-4000 FEDERAL WAY, WA 98003-6210 VIA FAX (206) 242-4209 Re: HERITAGE WOODS DIVISION NO.2, FINAL PLAT — City File No. SUB98-0003 Dear Mr. Alfredson: As we have previously discussed, the Supplemental Wetland Creation Plan and remaining landscaping at the rear of Tracts H and J must be financially secured prior to the City Council Land Use/Transportation Committee (LUTC) meeting on Monday, February 1, 1999. You stated that execution of the bonds can occur in one day. Attached are two original bond forms, one for implementing the Supplemental Wetland Creation and one for implementing the Tracts H and J Landscaping. Please complete both of the bond forms and return to me, including the required cash deposit identified on each bond form. Pursuant to SEPA condition number 4, and consistent with city policy, you are also required to pay for costs associated with city review of the wetland monitoring program. The Supplemental Wetland Creation Plan extends the wetland monitoring two years beyond the existing monitoring schedule, therefore, three more monitoring events are necessary. Attached is memo from Adolphson Associates Inc. (AAI), identifying the cost for reviewing the additional monitoring reports. By Monday February 1, 1998, please provide a check in the amount of $4,505.00 to cover review costs for the additional monitoring reports. Upon submittal of the above referenced bonds and cash, the Supplemental Wetland Creation Plan (revised January 22, 1999) will be approved. As identified in the City Council staff report, construction of the supplemental wetland creation must be completed by March 31, 1999, unless extended by the Director of Community Development Services. Prior to construction of the wetland creation, as specified in my letter of January 7, 1999, Public Works Department approval is required for modification of any of the existing storm drainage improvements. Contact Jim Femling, Engineering Plans Reviewer, at (253) 661-4196 regarding submittal requirements for the Public Works Review. Mr. Dennis Alfredson January 28, 1999 Page 2 The remainder of the landscaping in Tracts H and J must be completed by June 1, 1999, as identified in the City Council staff report and bond form. The city staff recommendation of project approval in the staff report is dependant upon your completion of the two bond forms and wetland monitoring review payment. I will provide you a copy of the staff report and agendas when copies are available. The Land Use/Transportation Committee meeting begins at 5:30 P.M. on Monday, February 1, 1999, and the City Council meeting begins at 7:00 P.M. Tuesday, February 2, 1999. Please call me immediately at (253) 661-4019 if you have any questions Sincerely, Harris Senior Planner attachments c: Greg Fewins, Principal Planner Jim Femling, Public Works Engineering Plans Reviewer LAPRMSYS\DOCUMEN SUB98 00.03\CD012899.DOC I February 1999 Mr. Jim Harris City of Federal Way 33530 First Way South Federal Way, Washington 98003-6210 RE: Heritage Woods Mitigation Plan Review AAI Task 97103-81 Dear Jim: ADOLFSON ASSOCIATES, INC. Adolfson Associates, Inc. (AAI) has reviewed the most recent (25 January 1999) revision of the Supplemental Wetland Creation Plan for the proposed Heritage Woods project. The plan and its subsequent revisions were produced by Kucinski Consulting Services, Inc. (KCS) for Schneider Homes, and were intended to provide an approach to rectify failed wetland mitigation efforts on the Heritage Woods site located on Military Road in Federal Way, Washington. Our earlier concerns have been addressed by the most recent plan. The last time we reviewed this plan our main concern was that the anticipated water regimes and vegetation classes were not described in the text or shown on the plan sheets. Although we would still like more assurance that particular wetland conditions will develop at specific locations in the mitigation areas, as requested the applicant has addressed the issue, and we are comfortable approving the plan with the level of detail it currently provides. In addition to reviewing the mitigation plan, AAI has also been asked to review the Heritage Woods mitigation monitoring reports that will be submitted over the next five years. For the purpose of explaining the new monitoring schedule, we will refer to the original monitoring phase (1997-2001) as Phase I, and the second monitoring phase (1999-2003) as Phase II. The original mitigation work (Phase I) was to be monitored for five years beginning in 1997. This original monitoring schedule called for two monitoring events in 1997 and two monitoring events in 1998, and then one monitoring event in each of the next three years. Schneider Homes and/or Parklane Ventures submitted some late reports and missed submittals during the first two years of monitoring for this phase, and therefore the City has now required that Phase I be monitored twice in 1999, twice in 2000, once in 2001 and once in 2002. The new mitigation plan (Phase II) will also require five years of monitoring, and it will be possible to combine some of that work with the originally scheduled monitoring effort. RECEIVED BY CnNwIINITy pEVELOPMFN. 7)ERARTMFt,T FEB 2 1999 Envirownental ,4nalysis 5309 Shilshole Ave. NW Seattle, WA 98107 adolfson@mdolfson.eom (2dO1''789-9658 FAX (2o6) 789-9684 4 The new monitoring schedule will be as follows: Year Spring Fall Additional Cost for Phase II 1999 Phases I&II 'Phases I&II $1005 2000 Phases I&II Phases I&11 $1035 2001 Phases I&II $305 2002 Phases I&II $1065 2003 Phase II 1095 $4505 Total Additional Cost The total cost for monitoring Phase II, in addition to the amount already set aside for Phase I monitoring, would be $4505. This cost reflects anticipated AAI billing rate increases, as well as a more intense level of monitoring review necessary because ,of the history of problems associated with this project. Please call me at (206) 789-9658' if you have questions. Again, thank -you for providing us with the opportunity to work on this project. Sincerely, Adolfson Associates, Inc. LOU- 1�0�_ Lizzie Zemke Senior Ecologist When Recorded Mail To: EASEMENT FOR WATER FACILITIES Grantor (s): City of Federal Way Grantee (s): Lakehaven Utility District Property Legal Description (abbreviated): Tract A, Heritage Woods Division 1 (full legal description attached as Exhibit A). Easement Legal Description: The South 15 feet of Tract A, Heritage Woods Division 1, according to the plat thereof recorded in Volume 179 of Plats, pages 76 - 83 in King County, Washington (full legal description attached as Exhibit B). Assessor's Tax Parcel ID#: N/A WHEREAS, Schneider Homes, Inc. a Washington corporation, is the owner of property known as the Heritage Woods Division 1 subdivision, located in Federal Way, Washington. WHEREAS, Schneider Homes, Inc. also owns and is in the course of obtaining subdivision approval for property known as the Heritage Woods Division 2 subdivision, also located in Federal Way, Washington; and WHEREAS, during the course of design and approval of Heritage Woods Division 1, Schneider Homes, Inc. dedicated Tract A of said subdivision to the City of Federal Way, for open space and park purposes; and Tract A is legally described in Exhibit A attached hereto and incorporated herein by reference; and WHEREAS, Schneider Homes, Inc. subsequently constructed a water line along the southwestern boundary of Tract A, Division 1, to connect lots within Division 2 with the Lakehaven Utility District; and WHEREAS, Schneider Homes, Inc. has conveyed or intends to convey the water line to Lakehaven Utility District, and desires to resolve questions of title to the property on which the water line is located and provide legal access to it for maintenance and operation; NOW, THEREFORE, for and in consideration of One Dollar ($1.00) and other valuable consideration, the receipt of which is hereby acknowledged, the City of Federal Way, a Washington municipal corporation ("Grantor"), grants, conveys and warrants to the Lakehaven Utility District ("Grantee") for the purposes hereinafter set forth a perpetual, non-exclusive easement for water facilities and all appurtenances related thereto ("Easement"), through, over and across the real property legally described in Exhibit B ("Easement Property") attached to and incorporated herein by reference. All of Grantee's rights with respect to the Easement granted herein shall be exercised as follows: 1. Purpose. Grantee and its agents, designees and/or assigns shall have the right, without prior notice to Grantor, at such times as deemed necessary by Grantee, to enter upon the Easement Property by foot or vehicle, for the installation, repair, reconstruction or maintenance of water facilities and appurtenances ("Facilities") without incurring any legal obligation or liability therefore, except as provided in Paragraph 3 below. 2. Access. Grantee shall obtain access to the Easement Property from South 284 1h Place and/or South 283" Place, at the points at which such streets directly abut the Easement Property. 3. Obstructions; Landscaping. Grantee's exercise of its rights under the Easement shall be accomplished in a manner that existing improvements and vegetation on Tract A are not disturbed or destroyed. In the event that they are disturbed or destroyed, they shall be replaced or repaired to as good a condition as they existed immediately before the Grantee entered the Easement Property or exercised any of its rights under the Easement. 4. Grantor's Use of Easement. Grantor reserves the right to use the Easement for any purpose not inconsistent with Grantee's rights, provided however, that Grantor shall not construct or maintain any building, wall, rockery, or other structure on the Easement, that Grantor shall not perform grading or other form of construction activity on the Easement Property that alters the functioning of the Facilities, and that Grantor shall not blast within fifteen (15) feet of the Easement. 6. Indemnification. Grantee agrees to indemnify, hold harmless and defend Grantor, its elected officials, employees, agents, and volunteers from any and all claims, demands, losses, actions and liabilities (including cost and attorney fees) to or by any persons or entities, including, without limitation, its respective agents, licensees, or representatives, where such claims, demands, losses, actions, or liabilities arise from or are claimed to arise from Grantee's negligence in the exercise of any rights under this Easement. 7. Successors and Assigns. The rights and obligations of the parties shall inure to the benefit of and be binding upon their respective successors in interest, heirs and assigns. DATED THIS day of October, 1998. GRANTOR GRANTEE CITY O DEfRnAL yVAY%� By: !�l �'�f�YL�,. �•+ Kenneth E. Nyberg City Manager Zg 7T: C- y Clerk, N. ristine Green, CM APPROVED AS TO FORM: City Attorney, Londi K. Lindell 2 LAKEHAVEN UTILITY DISTRICT Donald Perry General Manager k- STATE OF WASHINGTON ) ) ss. COUNTY OF KING ) 4Onis day person Ily appeared before me P me known to be the f the City of Federal *aashkigton M nicipal corporation that executed the foregoing instrument, and acknowledged the said instrument to be the free and voluntary act and deed of said corporation, for the uses and purposes therein mentioned, and on oath stated that he/she was authorized to execute said instrument and that the seal affixed, if any, is the corporate seal of said corporation. GIVEN my hand and official seal this 4o(tyed/printed f name of notary) Notary Public in and for the S ate f Washington. My commission expires-1j O y� K:lparkclhen i �.1 , i 00WAS- 3 STATE OF WASHINGTON ] } ss. COUNTY OF KING } On this day personally appeared before me to me known to be the of the Lakehaven Utility District, a Washington combined water/sewer district, that executed the foregoing instrument, and acknowledged the said instrument to be the free and voluntary act and deed of said corporation, for the uses and purposes therein mentioned, and on oath stated that he/she was authorized to execute said instrument and that the seal affixed, if any, is the corporate seal of said corporation. GIVEN my hand and official seal this day of _ 1998. (typed/printed name of notary) Notary Public in and for the State of Washington. My commission expires Exhibit A Full Legal Description for Tract A That portion of the NE quarter and that portion of the SE quarter of Section 33, Township 22 North, Range 4 East, W.M., more specifically known as Tract A of the Plat of Heritage Woods, Division 1, according to the plat thereof recorded in Volume 179 of Plats, pages 76-83 in King County, Washington. GI OCT-12-98 MON 12;12.PM SClV IDER HOMES FAX NO. 2 242 4209 P. 03 EXHIBIT "B" LAKEHAVYN UTILITY DIS'1'IIICT WATER MAIN EASEMENT THAT PORTION OF TRACT "A", 118RITAGE WOODS DIVISION 1, ACCORDING TO Ti IE f'LA'r TIIEREOF RECORDED IN VOLUME 179 OF Pf.ATS, PAGES 76 THROUGH 83, RECORDS OF KING COUNTY, WASRINGTON, DESCRIBED AS FOLLOWS-. BEGINNING AT TIME MOST WESTERLY SOUTHWEST CORNER OF SAID TRACT "A"; THENCE SOUTH 88056' l7" EASTALONG THE SOUTH LINE THEREOF, A DISTANCE OF 110.00 FEET; THENCE CONTINUING ALONG SAID SOUTH LINE SOUTH 74056'27" EAST A DISTANCE OF 109.74 FFRT TO A POINT ON A CURVE CONCAVE SOUTHEASTERLY, T14E RADIAL CENTER OF WHICH BEARS SOUTH 74056"27"EAST A DISTANCE OF 50.00 FEET; THENCE NORTHEASTERLY ALONG SAID CURVE TI IROUGII A CENTRAL ANGLE OF 17027,27", AN ARC DISTANCE OF 15.23 FEET; THENCE NORTH 74056'27" WEST A DISTANCE OF 113.89 FEET; THENCE NORTH 88056' 17" WEST A DISTANCE OF 111.84 FEET TO THE MOST WESTEnY WEST LINE OF SAID TRACT "A"; TI rENCE SOUTH b 1°03'43" WE, ALONG SAID WEST LINE, A DISTANCE OF 15.00 FEET TO THE POINT OF BEGINNING. 1 L11„"Ischneider homes, inc. 6510 Southcenter Boulevard•Suite #1 •Tukwila, WA 98188•(206) 248-2471 ■FAX (206) 242-4209 January 18, 1999 Phil Watkins, Chair Land Use/Transportation Committee City of Federal Way 33530 1" Way South Federal Way, WA 98003-6210 Re: Ordinance Approving Final Plat of Heritage Woods Division No. 2 City File No. SUB98-0003 Dear Mr. Watkins: It is my understanding that your committee will review our final plat application for the referenced project on February 1, 1999 before moving it before the full Council on February 2, 1999. Mr. James Harris shared with us in a January 7, 1999 letter that the City Council is required to approve an ordinance re- zoning the property to RS 7.2. He further stated that an ordinance requires two separate meetings before the full City Council, unless the City Council chooses to suspend the rules and condense the ordinance reading into one meeting. Since the typical time frame for ordinance enactment is 30 days from adoption, for the sake of expediency, we request that the required ordinance for the re -zone be condensed into one single reading, and the enactment time for that ordinance be reduced from 30 to 5 days. I believe the applicant for Heritage Woods Division One, Parklane Ventures was successful in obtaining approval of a similar request when they were attempting to record Heritage Woods Division One. We are quite anxious to move this project forward, and would appreciate any effort that will allow us to reduce the normal waiting period for ordinance enactment. We have numerous families anxiously awaiting the start of their new homes, and we want to do all that we can to insure the home's completion in the shortest acceptable time period. If there is anything more we need to do to further insure approval of our request for a condensed reading is granted, please do not hesitate to call me at (206) 248-2471. Kenneth E. Peckham Schneider Homes, Inc. Cc: Greg Moore, City of Federal Way James Harris, City of Federal Way RECEIVED BY COMMIJNIIY DES/ELOPMENT DEPARTMENT JAN 2 2 1999 SC-HN-EI-245 PB Schneider Homes, Inc. STORM DRAINAGE DIVERSION TO WETLANDS Project: Heritage Woods Div. II Flow Diverted from CB 4 Acres of Impervious Streets 3.19 Acres Impervious Roofs & Sidewalks 6.52 Acres of Impervious Total 9.72 Runoff Coeff. Impervious 0.90 Runoff Coeff. Pervious 0.25 Est. Time of Concentration (min) 7 i (2) = 1.58*Tc^-.58 = 0.53 P (average storm) = 0.29 Rainfall Intensity (1) = P * i = 0.15 Q (ave storm, cfs) = A*C*I = 1.33 NEW PIPE DIAMETER, in 6 Difference in elevation 7.2 Length of pipe 80 Slope 0.090 Pipe "n" 0.012 Velocity full (fps) 9.3 Hydraulic Radius/D @ d=0.25' (table) 0.2500 Hydraulic Radius 0.1250 Vel. @ d = 0.25' ft:1.49/n*RA.67*S^.5 9.3 Area / D A 2 @ d=0.25' (table) 0.3927 Area flow @ 0.25' (sf) = 0.098 Q (divert @4) 0.25' deep: A*V (cfs) 0.91 Q (ave) - Q(divert4) = Q(newtotal4) 0.42 Fraction of total flow diverted 0.69 RECEIVED BY COMMUNITY DEVELOPMENT DEPARTMENT JAN 19 1999 D. Alfredson, P.E. Flow Diverted from CB 3 Q(newtotal4) (cfs) 0.42 NEW PIPE DIAMETER, in 6 Difference in elevation 2.6 Length of pipe 55 Slope 0.0473 Pipe "n" 0.012 Velocity full (fps) 6.7 Hydraulic Radius/D @ d=0.25' (table) 0.2500 Hydraulic Radius 0.1250 Vel. @ d = 0.25' ft:1.49/n*RA.67*S^.5 6.7 Area / D A 2 @ d=0.25' (table) 0.3927 Area flow @ 0.25' (sf) = 0.098 Q(divert3) @ 0.25' deep: A*V (cfs) 0.66 Q(divert3) limited by Q(newtotal4) to 0.42 Fraction of total flow diverted 0.31 Schneider Homes, Inc. Diversion from CB 4 to Wetland D Project: Heritage Woods Div. II Total Area Contributing = Fraction of flow diverted at CB 4 Area effectively diverted at C134 January Total monthly rainfall (in) Total precip in month diverted (c.f.) Number of rain days Area of wetland (s.f.) c.f. precip / s.f. wetland / 30 days = gall s.f. daily from diversion gal/s.f./daily from rainfall directly on total gal/s.f./month February Total monthly rainfall (in) Total precip in month diverted (c.f.) Number of rain days Area of wetland (s.f.) c.f. precip / s.f. wetland / 30 days = gall s.f. daily from diversion gal/s.f./daily from rainfall directly on total gal/s.f./month March Total monthly rainfall (in) Total precip in month diverted (c.f.) Number of rain days Area of wetland (s.f.) c.f. precip / s.f. wetland / 30 days = gall s.f. daily from diversion gal/s.f./daily from rainfall directly on total gal/s.f./month 9.72 A = 423,192 s.f. 0.69 (from previous calcs) 290,198 s.f. July 6.39 Total monthly rainfall (in) 0.82 154,530 Total precip in month diverted (c.f.) 19,830 23 Number of rain days 4 6,470 Area of wetland (s.f.) 6,470 1.04 c.f. precip / s.f. wetland / 30 days 0.77 5.96 = gall s.f. daily from diversion 0.76 0.13 gal/s.f./daily from rainfall directly on 0.02 6.09 total gal/s.f./month 0.78 August 7.5 Total monthly rainfall (in) 0.45 181,374 Total precip in month diverted (c.f.) 10,882 15 Number of rain days 5 6,470 Area of wetland (s.f.) 6,470 1.87 c.f. precip / s.f. wetland / 30 days 0.34 6.99 = gall s.f. daily from diversion 0.42 0.16 gal/s.f./daily from rainfall directly on 0.01 7.15 total gal/s.f./month 0.43 September 1.91 Total monthly rainfall (in) 2.02 46,190 Total precip in month diverted (c.f.) 48,850 16 Number of rain days 10 6,470 Area of wetland (s.f.) 6,470 0.45 c.f. precip / s.f. wetland / 30 days 0.76 1.78 = gall s.f. daily from diversion 1.88 0.04 gal/s.f./daily from rainfall directly on 0.04 1.82 total gal/s.f./month 1.92 Schneider Homes, Inc. Diversion from CB 4 to Wetland D Project: Heritage Woods Div. II April October Total monthly rainfall (in) 5.66 Total monthly rainfall (in) 4.34 Total precip in month diverted (c.f.) 136,877 Total precip in month diverted (c.f.) 104,955 Number of rain days 22 Number of rain days 14 Area of wetland (s.f.) 6,470 Area of wetland (s.f.) 6,470 c.f. precip / s.f. wetland / 30 days 0.96 c.f. precip / s.f. wetland / 30 days 1.16 = gall s.f. daily from diversion 5.27 = gall s.f. daily from diversion 4.04 gal/s.f./daily from rainfall directly on 0.12 gal/s.f./daily from rainfall directly on 0.09 total gal/s.f./month 5.39 total gal/s.f./month 4.13 May November Total monthly rainfall (in) 2.38 Total monthly rainfall (in) 5.36 Total precip in month diverted (c.f.) 57,556 Total precip in month diverted (c.f.) 129,622 Number of rain days 13 Number of rain days 23 Area of wetland (s.f.) 6,470 Area of wetland (s.f.) 6,470 c.f. precip / s.f. wetland / 30 days 0.68 c.f. precip / s.f. wetland / 30 days 0.87 = gall s.f. daily from diversion 2.22 = gal/s.f. daily from diversion 5.00 gal/s.f./daily from rainfall directly on 0.05 gal/s.f./daily from rainfall directly on 0.11 total gal/s.f./month 2.27 total gal/s.f./month 5.11 June December Total monthly rainfall (in) 0.56 Total monthly rainfall (in) 9.02 Total precip in month diverted (c.f.) 13,543 Total precip in month diverted (c.f.) 218,132 Number of rain days 4 Number of rain days 2.41 Area of wetland (s.f.) 6,470 Area of wetland (s.f.) 6,470 c.f. precip / s.f. wetland / 30 days 0.52 c.f. precip / s.f. wetland / 30 days 13.99 = galt s.f. daily from diversion 0.52 = gall s.f. daily from diversion 8.41 gal/s.f./daily from rainfall directly on 0.01 gal/s.f./daily from rainfall directly on 0.19 total gal/s.f./month 0.53 total gal/s.f./month 8.59 Schneider Homes, Inc. Diversion from CB 3 to Wetland 4 Project: Heritage Woods Div. II Total Area Contributing = Fraction of flow diverted at CB 3 Area effectively diverted at CB 3 January Total monthly rainfall (in) Total precip in month diverted (c.f.) Number of rain days Area of wetland (s.f.) c.f. precip / s.f. wetland / 30 days = gal/ s.f daily from diversion gal/s.f./daily from rainfall directly on total gal/s.f./month February Total monthly rainfall (in) Total precip in month diverted (c.f.) Number of rain days Area of wetland (s.f.) c.f. precip / s.f. wetland / 30 days = gall s.f. daily from diversion gal/s.f./daily from rainfall directly on total gal/s.f./month March Total monthly rainfall (in) Total precip in month diverted (c.f.) Number of rain days Area of wetland (s.f.) c.f. precip / s.f. wetland / 30 days = gall s.f. daily from diversion gal/s.f./daily from rainfall directly on total gal/s.f./month 9.72 A = 423,192 s.f. 0.31 (from previous calcs) 132,994 s.f. July 6.39 Total monthly rainfall (in) 0.82 70,819 Total precip in month diverted (c.f.) 9,088 23 Number of rain days 4 7,750 Area of wetland (s.f.) 7,750 0.40 c.f. precip / s.f. wetland / 30 days 0.29 2.28 = gall s.f. daily from diversion 0.29 0.13 gal/s.f./daily from rainfall directly on 0.02 2.41 total gal/s.f./month 0.31 August 7.5 Total monthly rainfall (in) 0.45 83,121 Total precip in month diverted (c.f.) 4,987 15 Number of rain days 5 7,750 Area of wetland (s.f.) 7,750 0.72 c.f. precip / s.f. wetland / 30 days 0.13 2.67 = gall s.f. daily from diversion 0.16 0.16 gal/s.f./daily from rainfall directly on 0.01 2.83 total gal/s.f./month 0.17 September 1.91 Total monthly rainfall (in) 2.02 21,168 Total precip in month diverted (c.f.) 22,387 16 Number of rain days 10 7,750 Area of wetland (s.f.) 7,750 0.17 c.f. precip / s.f. wetland / 30 days 0.29 0.68 = gall s.f. daily from diversion 0.72 0.04 gal/s.f./daily from rainfall directly on 0.04 0.72 total gal/s.f./month 0.76 Schneider Homes, Inc. Diversion from CB 3 to Wetland 4 Project: Heritage Woods Div. II April Total monthly rainfall (in) Total precip in month diverted (c.f.) Number of rain days Area of wetland (s.f.) c.f. precip / s.f. wetland / 30 days = galls. f. daily from diversion gal/s.f./daily from rainfall directly on total gal/s.f./month May Total monthly rainfall (in) Total precip in month diverted (c.f.) Number of rain days Area of wetland (s.f.) c.f. precip / s.f. wetland / 30 days = gall s.f daily from diversion gal/s.f./daily from rainfall directly on total gal/s.f./month June Total monthly rainfall (in) Total precip in month diverted (c.f.) Number of rain days Area of wetland (s.f.) c.f. precip / s.f. wetland / 30 days = gall s.f. daily from diversion gal/s.f./daily from rainfall directly on total gal/s.f./month October 5.66 Total monthly rainfall (in) 4.34 62,729 Total precip in month diverted (c.f.) 48,099 22 Number of rain days 14 7,750 Area of wetland (s.f.) 7,750 0.37 c.f. precip / s.f. wetland / 30 days 0.44 2.02 = gall s.f. daily from diversion 1.55 0.12 gal/s.f./daily from rainfall directly on 0.09 2.14 total gal/s.f./month 1.64 November 2.38 Total monthly rainfall (in) 5.36 26,377 Total precip in month diverted (c.f.) 59,404 13 Number of rain days 23 7,750 Area of wetland (s.f.) 7,750 0.26 c.f. precip / s.f. wetland / 30 days 0.33 0.85 = galls. f. daily from diversion 1.91 0.05 gal/s.f./daily from rainfall directly on 0.11 0.90 total gal/s.f./month 2.02 December 0.56 Total monthly rainfall (in) 9.02 6,206 Total precip in month diverted (c.f.) 99,967 4 Number of rain days 2.41 7,750 Area of wetland (s.f.) 7,750 0.20 c.f. precip / s.f. wetland / 30 days 5.35 0.20 = gall s.f. daily from diversion 3.22 0.01 gal/s.f./daily from rainfall directly on 0.19 0.21 total gal/s.f./month 3.40 CITY OF AUBURN, RAINFALL DATA FOR 1996 a• City HALL (in ]ncheel file name Rk N96CU JNt FE9 t+AR APR. MAY JUNK JULY A.M. SEPT OCT' NOV OEC. 1596 TOTAL CLAY 1 0 D 01 0.00 0 49 D.00 0.00 0.00 D.00 0.00 0.00 0.00 O.DO 2 0.25 0 00 0.00 0.00 0 00 D 00 0.00 0.26 0.00 0 On n 0t 0.19 1 0 06 0 22 0.39 0 00 O OJ n 00 0 07 0.05 11 14 0.01 0 25 0 0] 4 0 02 a Ol 0 00 0 00 0 DO 0.00 0 00 0.04 O.DD 0.52 0.00 0.59 5 0.16 0.67 D.06 0.02 0 00 0 00 0.00 0.00 0.48 0.00 0.03 0,16 6 0.11 1.11 0.01 0.35 D 00 O.DO 0.00 0.00 0.00 0.00 0.11 0.15 7 1.32 0,84 0.04 O.D1 0.00 0.04 O.DO 0.00 0.00 0.00 0.00 0.3S 8 O 01 2.7{ 0.00 D 01 0.00 0.00 O.DO 0.00 0.02 O.OD 0.00 0.58 9 0 02 0.10 0.08 D.OS 0.00 0.00 0.00 0.00 0.00 0 00 0.00 0.05 10 0 Oi 0.00 0.38 0.06 O.DO 0.00 0.00 O.DO 0.00 0 00 0.00 0 29 11 0.00 0.00 0.20 0.10 D.11 O.OD 0.00 0.00 O.DO 0-16 0.06 0.24 12 0.00 0.00 0.01 O.D6 D 62 0.00 0.00 0.,00 0.02 0-07 0.46 0.19 I3 0 26 0.00 0.00 0.00 0.51 0 00 0.00 0.00 0.09 0.29 0.29 0.20 14 0.88 0,00 0.00 0.00 0.01 0 00 0.00 0.00 0.31 0.34 0.10 0.00 15 0.15 0.00 O.DO 0.40 0.01 0.00 0.00 0.00 0.33 0.00 0-07 0.0{ 36 0.10 0.02 0.00 0.34 0.01 0.00 0.00 0.00 0.00 0.05 0.22 O.D1 17 0.09 0.51 0.40 0.11 0.20 0.04 0.16 0.00 0.00 0.60 0.32 0.01 18 O.DO 0.34 0.00 0.37 0.56 0.00 0.46 0.00 0.16 0.24 0.14 DAD " 19 0.46 0.20 0.07 0.24 0 02 0.00 0.13 0.00 0.2% 0.00 0.06 0.29 20 0.74 0.20 0.0? 0.00 0 00 0.00 D.00 0.00 0.00 0.00 0.35 0.29 21 D 44 0 05 D.06 0.00 0.09 0 DO 0.00 O.DO 0.01 0.56 0.20 0 DO 22 0.10 0.34 0.21 0.69 0.03 O.DO 0.00 0.00 0.00 0.04 0.01 D.10 2.3 0.25 0.05 0.02 1.52 0.05 0 31 0,00 0 00 0.00 0.49 0.32 0.25 24 0.16 D.00 0 DO 0.24 O.OD 0 19 0,00 0.00 0 OD 0 14 D 67 0.74 25 0 01 0 00 0. DI 0.41 0 DO 0 00 0 00 O.DO 0 DO 0.00 0 17 0.01 26 D 01 0.00 0 00 0-04 0 00 0.00 0 DO 0,00 0.00 0.00 0.04 0.01 21 0.00 O.DO 0 03 0.00 D.DO 0.03 0-DO 0.00 0.00 0.00 1 25 0.01 28 0.08 0 00 0 00 0 DO 0-00 0.00 0.00 0.00 0.00 0.74 0 02 0.09 " 29 0.00 0 00 0 OS 0 01 0 00 0.00 0.00 0.00 0.00 D.00 0.00 2.41 ]0 0 00 0.00 0.06 O.DO 0.00 0.00 0.06 O.DO 0 00 0 21 0 53 31 0.00 0 29 0.00 0 00 0,04 0.00 0 94 'POTAI, 6 19 7 5O 1 91 5.66 2.1R D 56 0.12 OAS 2.02 4.34 5.36 9.02 46.41 Max 1-Day "Infall 1 12 2 78 0 19 1.52 0 t] 0.11 0.46 0.26 0 49 0.74 3.25 2-41 Nucbor of Rain Days 23 15 76 22 S] 4 4 S 10 14 23 27 O ti8 0,16 6.14 0,01 0, ti l 0,1� 6) p 31 O V' J V it KING COUNTY, \ ASHINGTON, SURFACE WATER DESIGN MANUAL "IR" Peak Rainfall Intensity The peak rainfall Intensity (I,) for the specified return frequency (,J design storm Is determined using a unit peak rainfall Intensity factor (IR) for a given return frequency (R) design storm using the following equation: IR = (PR) (11) where: PR = Is the total precipitation at the project site for the 24-hour duration design storm event for the given return frequency (from the Isopluvial Maps in Figures 3.5.1C through 3.5.1 H) IR - (aR) (T.) bR' ; the unit peak rainfall Intensity factor Where T, = time of concentration (minutes), calculated using the method described below only (, minimum value Is 6.3 minutes) as and bR are coefficients (from Table 4.3.38) used to adjust the equation for the design storm return frequency (R) This "IR" equation was developed by SWM Division staff from equations originally developed by Ron Mayo, P.E,. It is based on the original Renton/Seattle Intensity/Duration/Frequency (I.D.F.) curves. Rather than requiring a family of curves for various locations In King County this equation adjusts proportionally the Renton/Seattle I.D.F, curve data by using the 24-hour duration total precipitation isopluvial maps. This adjustment Is based on the assumption that the localized geo-climatic conditions that control the total volume of precipitation at a specific location also control the peak intensities proportionally. Figure 4.3.3A has been included to demonstrate that this unit peak rainfall intensity (IR) will generate a curve with the same characteristics as the historic 25 year I.D.F. curve. Note, T, must not be less than 6.3 minutes or greater than 100 minutes. On the historic I.D.F. curves the lower limit was set at 5 minutes, 6.3 minutes was selected based on the mathematical limits of the equation coefficients. TABLE 4.3.3E COEFFICIENTS FOR THE RATIONAL METHOD "IR- -EOUATION DESIGN STORM RETURN FREQUENCY (YEARS) aR bR 2 Year 1.58 0.58 5 Year 2.33 0.63 10 Year 2.44 0.64 25 Year 2.66 0.65 50 Year 2.75 0.65 100 Year 2.61 0.63 4.3.3-3 1 /90 PROFESSIONAL ENGINEERING REGISTRATION PROGRAM P.O. Box 911, San Carlos, CA 94070 Page: 3-61 Table 3.9 Area, Wetted Perimeter and Hydraulic Radius of Partially Filled Circular Pipes n d area wet. per. hyd. rad. d arear67 . per,hyd. rad. DD' D D D D=DD 0.01 0.0013 0.2003 0.0066 0.51 0.40275908 0.2531 0.02 0.0037 0.2838 0.0132 0.52 0.41276108 0.2561 0.03 0.0069 0.3482 0.0197 0.53 0.42276308 0.2591 0.04 0.0105 0.4027 0.0262 0.54 0.4327509 0.2620 0.05 0.0147 0.4510 0.0326 0.55 0.4426710 02649 0.06 0.0192 0.4949 0.0389 0.56 0.4526911 0.2676 0.07 0.0242 0.5355 0.0451 0.57 0.4625113 0.2703 0.08 0.0294 0.5735 0.0513 0.58 0.4723315 0:2728 0.09 0.0350 0.6094 0.0574 0.59 0.4822518 0.2753 0.10 0.0409 0.6435 0.0635 0.60 0.4920722 0.2776 0.11 0.0470 0.6761 0.0695 0.61 0.5018926 0.2797 0.12 0.0534 0.7075 0.0754 0.62 0.5115132 •0.2818 0.13 0.0600 0.7377 0.0813 0.63 0.5212338 0.2839 0.14 0.0688 0.7670 0.0871 0.64 0.5308546 0.2860 0.15 0.0739 0.7954 0.0929 0.65 0.5404755 0.2881 0.16 0.0811 0.8230 0.0986 0.66 0.5499 .65 0.2899 0.17 , 0.0885 0.8500 0.1042 0.67 0.�594 1.9177 0.2917 0.18 j 0.0961 0.8763 0.1097 0.68 0.5687 1.9391 0.2935 0.19 1 0.1039 0.9020 0.1152 0.69 0.5780 1.9606 0.2950 0.20 0.1118 0.9273 0.1206 0.70 0.5872 1.9823 0.2962 0.21 0.9 0.9521 0.1259 0.71 0.5964 2.0042 0.2973 0.22 0.1281191 0.9764 0.1312 0.72 0.6054 2.0264 0.2984 0.23 0.1365 1.0003 0.1364 0.73 0.6143 2.0488 0.2995 0.24 0.1449 1.0239 0.1416 1 0.74 0.6231 2.0714 0.3006 0.25 0.1535 1.0472 0.1466 0.75 0.6318 2.0944 0.3017 0.26 0.1623 1.0701 0.1516 0.76 0.6404 2.1176 0.3025 0.27 0.1711 1.0928 0.1566 0.77 0.6489 2.1412 0.3032 0.28 0.1800 1.1152 0,1614 0.78 0.6573 2.1652 0.3037 0.29 0.1890 1.1373 0.1662 1 0.79 0,6655 2.1895 0.3040 0,30 0.1982 1.1593 10.1709 0.80 0.6736 2.2143 0.3042 0,31 j 0.2074 i 1.1810 1 0.1755 0.81 0.6815 2.2395 0.3044 0.32 0.2167 1 1.2025 t 0,1801 0.82 0.6893 2.2653 0.3043 0.33 0.2260 ' 1.2239 ! 0.1848 0.83 0.6969 2.2916 0.3041 0,34 0.2355 1.2451 0.1891 1 0.84 0.7043 2.3186 0.3038 0,35 0.2450 1.2661 0.1935 1 0.85 0.7115 2.3462 0.3033 0.36 0.2546 1.2870 0.1978 0.86 0.7186 2.3746 0.3026 0.37 0.2642 1.3078 0.2020 0.87 0.7254 2.4038 0.3017 0.38 0.2739 1.3284 0.2061 0..88 0.7320 2.4341 0.3008 0.39 0.2836 1.3490 0.2102 0.89 0 7384 2.4655 0.2996 0.40 l 0.2934 1.3694 1 0.2142 0.90 10.7445 2.4981 0.2980 0.41 0.3032 1.3898 0 2181 0.91 0.7504 2.5322 0.2963 0.42 0.3130 1.4101 ' 0 2220 0,92 0.7560 2.5681 0.2944 0.43 0.3229 1.4303 0 2257 0.93 0.7612 2.6061 0.2922 0.44 0,3328 1.4505 0 2294 0.94 0 7662 2,6467 0.2896 0.45 0,3428 1.4706 0.2331 0.95 0.7707 2.6906 0.2864 0.46 0,365227 1.4907 0.2366 7 .i 0.7749 2.7389 0.28300.47 0.31.5108 0.2400 0.97 1 0.7785 2.7934 0.2787 0.48 0.3727 1.5308 0 2434 0.98 1 0.7816 2.8578 0.2735 0.49 0.3827 1.5508 0,2467 0.99 0.7841 2.9412 0.2665 0.50 0.3927 1.5708 0.2500 1.00 0.7854 3.1416 0 2500 eFg= 33530 1ST WAY SOUTH January 15, 1999 Mr. Kenneth Peckham Schneider Homes, Inc. 6510 Southcenter Blvd, Suite 1 Tukwila, WA 98188 fA - (206) 661-4000 FEDERAL WAY, WA 98003-6210 Re: Heritage Woods Division II Final Plat—SUB98-0003 Dear Mr. Peckham: The city has received your December 28, 1998, letter and additional correspondence from Schneider Homes concerning the finalization of the plat of Heritage'Woods Division II. In response to your suggestion, we discussed the matter with the City Attorney's Office. Their opinion supports this department's previous position to require an approved wetland creating plan and financial guarantee for implementing the plan prior to a favorable recommendation to the City Council on final plat Division 2. The city is not "reneging" on its approval of the wetland creation plan approved for Division I. Rather, it is looking to the requirements of preliminary approval for the entire Heritage Woods Preliminary Plat. Approval of the wetland creation plan for Division I is limited by the terms of that approval for Division I, and does not encompass Division II. The loss of sales you mention are not due to inappropriate actions by the city, but by a failure of Schneider Homes to complete its final plat application. Until an approved wetland creation plan is added to the package, staff will continue to consider the final plat application incomplete. Your wetland expert's report indicates quite clearly that the required created wetlands are not functioning as was anticipated. In order to approve Division II, the city must be able to make certain required findings of fact. The staff cannot recommend that the City Council make those findings given the current state of the wetlands. This department has offered to recommend approval of the final plat of Division II if you provide a new wetland creation plan, and post an appropriate bond for performance and maintenance. That offer still stands. Without- a new approved plan, the staff will recommend denial of the final plat. Mr. Kenneth Peckham January 15, 1999 Page 2 On January 8, 1999, the city received a letter from Dennis Alfredson requesting that the city place the matter on the February 1, 1999, Land Use/Transportation Committee (LUTC) and February 2, 1999, City Council agendas. I understand that Schneider Homes has provided a new wetland creation plan, but there may not be enough time to review and approve that plan before the February meeting dates. If the matter goes before the City Council without an approved wetland creation plan, staff would recommend denial of the final plat and if the City Council does not approve of it, it could be fatal to your project. The preliminary plat approval will expire, and cannot be extended any longer. Therefore, you would have to start over with a new preliminary plat and rezone application. However, if you wish to rush this incomplete application to the City Council, the department will do so. Sincerely, il"t M Gregory D. Moore, AICP Director of Community Development Services c: Jim Harris, Senior Planner L:\PRMSYS\DOCUMENT\SUB98 00.03\CD 115LTR. DOC arm Narvua, CITY OFr� 33530 1 ST WAY SOUTH January 14, 1999 VIA FACSMULE TO: (206) 623-7789 George Kresovich Hillis, Clark, Martin & Peterson 1221 Second Avenue, #500 Seattle, WA 98101-2925 RE: Heritage Woods Division H Dear Mr. Kresovich : (253) 661-4000 FEDERAL WAY, WA 98003-6210 (253) 661-4034 Thank you for talking with me yesterday concerning Schneider Homes' request for final plat approval for the above -referenced plat. After our conversation, I checked with City staff, who confirmed that the wetland mitigation at issue was required as a result of the filling of one wetland located entirely within the boundaries within the boundaries of Division II, and the filling of another which overlaps the boundary between Division I and Division II. Further, the wetland mitigation is an integral part of a storm drainage retention/detention pond, which the Division I final plat approval notes must be dedicated to the City as part of final plat approval for Division II. Accordingly, properly functioning wetland mitigation is necessary in order to allow the City Council to make the findings required under RCW 58.17.110(2) as part of final plat approval for Division II. Given this, there is no basis for the position taken by Ken Peckham in his December 28, 1998 letter to the City. I also understand from our staff that Schneider Homes' "first cut" wetland restoration plan arrived this morning and that staff will be working with the City's consultant to expeditiously review the plan and provide comments to Schneider Homes. Hopefully, this means that your client is on the right track toward meeting the conditions previously outlined by City staff. As I mentioned during our conversation, I will be out of the office starting Friday, January 15 and will not be back in the office until Tuesday, January 26. In the interim, please contact RECEIVED BY comwiNITY DEVELOPMENT DEPARTMENT JAN 19 1999 George Kresovich January 14, 1999 Page 2 Assistant City Attorney Pat Richardson if you have questions. Otherwise, I will touch base with you upon my return if matters have not been resolved by then. _ Sincerely, Bob C. Sterbank Deputy City Attorney BCS:db cc: James Harris, Senior Planner Greg Moore, Director of Community Development Services KAletterMesovic.114 Lornlischneider homes, inc. 6510 Southcenter Boulevard•Suite #1 •Tukwila, WA 98188•(206) 248-2471 •FAX (206) 242-4209 December 28, 1998 Mr. Gregory Moore, AICP, Director of Community Development Services City of Federal Way 33530 1" Way So Federal Way, WA 98003-6210 Re: Heritage Woods Division II Final Plat Approval Process Dear Mr. Moore: We are in receipt of your letter dated December 24. It is apparent that this discussion is fruitless, though I do want to re-emphasize one important point: The wetland mitigation has already been accepted by the City prior to recording of Division I. Only a Maintenance Bond is outstanding, in which this acceptance is clearly stated. The Performance Bond has been released. It is unreasonable (and, I would suspect, unlawful) to now demand that the wetland mitigation be accepted a second time prior to recording Division II. This particularly in light of the Contingency notes on the original approved mitigation plan, which anticipate and allow for areas found over time to be non -performing. Further, given that the mitigation had already clearly been accepted, it is unreasonable to expect that the present stance by the City might have been predicted. While the area of successfully created wetland is not in full conformance with the approved plan, the area that is doing well is substantial (more than half). At what point does the City decide the state of the wetland mitigation is sufficiently deficient that it must be accepted all over? At 80%, 90%, 100%? It is my impression that the decision to require a new "acceptance" was entirely subjective. Had the fraction of successfully created wetland been, say, 90% of the planned total, it is my impression that this issue would not have arisen, that only a monitoring report would have been required (as stated in the October 2 letter). However, because we anticipate no satisfaction from this line of reasoning, Schneider Homes is working toward meeting your demands. Our wetland biologist has now developed a plan, which I will go over in the next day or two. Then the representative from Adolfson will be consulted for concurrence. RECEIVED BY r;OUR41INITY DEVELOPMENT DEPARTMENT DEC 3 0 1998 SC-HN-EI-245 P8 Our landscaping superintendent has decided to wait until the new mitigation plan is approved before starting and work, including replacement of dead trees. Respectfully, HO S, INC. son, P.E. evelopment & Construction [(11J1 schneider homes, inc. 6510 Southcenter Boulevard•Suite #1 •Tukwila, WA 98188•(206) 248-2471 •FAX (206) 242-4209 December 28, 1998 Mr. Greg Moore, AICP Director of Community Development Services City of Federal Way 33530 0 Way South Federal Way, WA 98003-6210 Re: Heritage Woods Division II Final Plat Dear Greg: I have reviewed your letter of December 24, 1998 and feel compelled to respond. We are fully aware of the approval conditions for not only Division Two, but for Division One as well. What I'm not sure you're aware of is the fact that we satisfied the conditions of approval related to the mitigation improvements which the city of Federal Way at one time felt where satisfactory when they accepted the improvements prior to the recording of Division One. Regardless of whether or not those same mitigated wetlands are functioning as intended, you still cannot arbitrarily forget that the city did indeed accept the mitigation improvements prior to the recording for Division One. I think it is imperative that you consult the cityattorney for some direction on this issue. Our attorney has informed us that the city cannot renege on it's previous acceptance or approval, especially in a situation I here the city required a maintenance bond for the purpose of insuring the adequacy of the mitigated improvements. The fact that the maintenance bond is perceived as being inadequate to cover the expense of furthering the proper function of the mitigated wetland areas is an issue totally outside that regarding our request that the city perform in a manner you are obligated to perform in. If the city is reneging on its prior acceptance and approval of the mitigated wetlands, and attempting to tie the approval of the final plat for Division Two to a previously satisfied condition, the city may be liable for any damages we incur as a result of that action. The city of Federal Way can require that we repair or replace the accepted improvements to the wetland mitigation areas, or in the alternative choose to foreclose upon our maintenance bond. This is a bonding issue and not a condition of approval issue, as you removed that issue from the table when you accepted the improvements prior to the recording of Division One. If you attempt to fall back on the position that the newly requested improvements be substantially complete prior to the recording of Division Two, again I will direct you to the fact that the improvements were deemed substantially complete by the city of Federal Way prior to the recording of Division One. Greg, we have every intention to fix the problems with the wetlands, as we have no desire in seeing our bond forfeited. But the repercussions of continuing to hold us hostage regarding movement towards obtaining final plat approval are quite frankly placing the city at serious monetary risk. We are losing pre - sales on the average of one per week. Our inability to deliver finished homes is causing people to cancel purchase and sale agreements since we are prohibited from performing as per those contracts. Make no mistake about it, we will seek legal remedy from the courts to hold the city liable for any damages we incur as a result of the city's continued improper and illegal conditions and requirements. You stated that you are prepared to make a recommendation to the city Council, and that recommendation would be to not approve the final plat for Division Two due to the wetland problems. If that CO^AMI INITv RECEIVED BY DEVELOPMENT DEC 3 1 SC-HN-EI-245 P8 recommendation is based again on the wetland issue, I would caution you that attempting to tie any recommendation to a previously satisfied condition may again be cause for legal action. We have no desire to press this issue before a legal body. If our attitude has been anything but cooperative regarding our desire to correct the deficiencies, that comes as news to me. I am constantly seeking the establishment of some middle ground that creates a win win situation for everybody. But it appears the city's position on this matter is an unyielding maneuver intended to make up for something that should have occurred prior to the recording of Division One. The city's approval and acceptance of the mitigated wetlands and the acceptance of the maintenance bond precludes the city from seeking any other remedy other than that available to you regarding the bonding issue. The only thing I am willing to negotiate in the short term is increasing our maintenance bond for the wetlands, as we continue to work towards improving the function of the mitigated wetlands. We have and continue to deal in good faith with the city of Federal Way. The city of Federal Way on the other hand has not dealt with Schneider Homes in good faith, and as a result may be liable for such actions. Given the consistent tone of your previous letters, I am doubtful that anything I say in this letter will move you from the stance you have taken regarding this issue. That is why I am requesting you seek direction from the city attorney, as he may provide some insight concerning the position you are placing the city and Schneider Homes in by attempting to hold us to previously satisfied conditions of approval. I would be more than happy to once again sit down with you for the purpose of resolving this issue. I can be reached at (206) 248-2471 and would be available to meet with you at your convenience. Sinc ely, Kenneth E. Peckham Schneider Homes, Inc. Cc: George Kresovich, Attorney at Law Gerald E. Schneider, President Kenneth Nyberg, Manager City of Federal Way December 18, 1998 Greg Fewins City of Federal Way ADOLFSON 33530 1st Way South ASSOCIATES, INC. Federal Way, Washington 98003-6210 RE: HERITAGE WOODS WETLAND DELINEATION VERIFICATION Dear Mr. Fewins: ADOLFSON ASSOCIATES, INC. (AAI) is pleased to present the following summary of our findings of a wetland delineation verification at the Heritage Woods Mitigation site located west of Military Road South in Federal Way, Washington (Section 33, Township 22 North, Range 4 East). The purpose of the site visit was to verify the delineation that was recently completed by Kucinski Consulting Services, Inc. Our survey methods are based on the Washington State Wetlands Identification and Delineation Manual (Washington State Department of Ecology, 1997). I met with Mr. Gary Kucinski on the site on December 17, 1998 io verify his delineation of the created wetland boundaries and to discuss potential options for further wetland creation. As this is only the second year after the wetland areas were supposed to have been created, we do not expect obvious indicators of hydric soils to exist. However, some of the created wetland areas did exhibit faint mottling. The majority of the delineation was based on the presence of hydrology and hydrophytic vegetation. I found Mr. Kucinski's delineation to be accurate based on my best professional judgement. We discussed some options for creating further wetland areas and determined that Creation Area #4, south of the detention pond, may be the best option for creating wetlands that will retain adequate natural hydrology. Once the survey of the delineation is completed, we will be able to determine the exact amount of creation needed and the best options to proceed. If you have any questions or concerns, please feel free to call Lizzie Zemke or me at (206) 789=9658. Sincerely, ADOLFSON ASSOCIATES, C. Marja Preston Staff Scientist cc: Mr. Gary Kucinski, Kucinski Consulting Services, Inc. RECEIVED BY COUIMUNIT' r)F`/FL0PNAr,T DEPARTMENT DEC ? 11998 Environmental Analysis 5309 Shilshole Ave. NW Seattle, WA 98107 adolfson@adolfson. com (206) 789-9658 FAX (206) 789-9684 C,0 • Dallas, TX • Los Angeles, CA • Madison, WI • Milwaukee, WI • Seattle, WA • Washington, D.C. GILES ENGINEERING l 1SSOCIATES, INC. GEOTECHNICAL, ENVIRONMENTAL & CONSTRUCTION MATERIALS CONSULTANTS City of Federal Way 33530 First Way South Federal Way, WA 98003-6210 August 25, 1997 Attention: Mr. Stephen Clifton, Development Services Manager RECEIVED AUG 2 8 1997 FEDERAL'L#L'AYPUBLIC WORKS ADMINISTR,4TIO1�I DIVJSION Subject: Geotechnical Engineering Review Heritage Woods, Tract H and J of Division 1, Lots 52 through 58 Federal Way, Washington Project No. 6G-9707028 Dear Mr. Clifton: This letter presents the opinions and conclusions of Giles Engineering Associates, Inc. regarding geotechnical engineering considerations for development of the referenced residential lots. These conclusions were reached based upon review of information provided by City staff at a meeting on August 6, 1997, a visit to the site on August 8, 1997, engineering analysis, and our experience with similar soils and geologic conditions. Authorization for these services was provided by you verbally, and in our Professional Services Agreement dated August 6, 1997. The purpose of these services was limited to an evaluation of earthwork and foundation construction proposed by the developer of the referenced project site regarding stability, erosion, and foundation support. This letter is an instrument of service and the conclusions presented herein have been promulgated in accordance with generally accepted professional engineering practice in the field of geotechnical engineering. No other warranty is either expressed or implied. This letter has been 1'ep r-ed f the exclusive 7 is f the : " era Way, y or � application + t + + ' r t.a_ for h .vYC, �.� e L.�e O .., City O. Fed.,�cz. v�; ay, .�� SpeCi,li 60 the S�a.�eu purpose and site. SITE AND PROJECT DESCRIPTION The subject property is located on the east side of the intersection of South 280th Street and 25th Place South in Federal Way, Washington. The proposed residential lots which are the subject of this review, designated lots 52 through 58, are in the northeastern portion of the Heritage Woods residential development. The lots are 8,400 square feet each, with varying frontage on the west side of South 280th Street and 25th Place South. The grading plan for the project, by Jaeger Engineering and dated December 1994, was referenced for the lot grades and boundaries. The referenced lots are located on the western sloped of a roadway embankment, which appears to have been constructed by filling to depths of up to 20 feet, on an existing west -facing native slope. The final till slopes were reportedly constructed at angles of up to 1.511:1 V (Horizontal: Vertical), although the referenced grading plan indicated a design slope angle of 2H:1 V 19019 36th Avenue West • Suite G • Lynnwood, WA 98036 206/771-5775 • Fax 206/771-5557 • E-Mail seattle@gilesengr.com GILES ENGINEERING l 1SSOCIATES, INC. City of Federal Way Project No. 6G-9707028 August 25, 1997 Page 2 or flatter. The slope apparently failed during the winter of 1996/97, by slumping/flowing in the vicinity of Lots 53/54, and by minor slumping and development of tension cracks throughout the area of lots 53 and 56. Debris and mud from the failure flowed west of the property line of lots 53 and 54 into a designated Native Growth Protection Easement. The site conditions were evaluated by Golder Associates, Inc. following the slope failures, for the assumed purpose of providing options for lot grading and construction. Golder Associates provided two geotecbnical reports which were supplied to us by the City for review. These reports were dated June 23 and July 14, 1997. The June 23 report includes information regarding soil and groundwater conditions, including the logs of six test pits excavated on June 15, 1997. The July 14, report contains a summary of grading alternatives for lots 52 and 58, which were based on configurations of the lots such as setbacks, slopes, and grades provided by Schneider Homes. In general, site conditions observed during our reconnaissance of surface features on the site do not differ from those described in the referenced Golder Associates reports. The seepage locations and quantities reported by Golder Associates appear to have dried up, most likely indicating that the seepage is related to seasonal precipitation. CONCLUSIONS The documents indicate that there are inter -related planning, construction and engineering issues which must be considered in developing a grading plan for these lots. The following summary describes our understanding of these issues and corresponding conclusions. If other constraints exist of which we are unaware, we should be consulted for possible modification of our conclusions and recommendations. ■ Golder Associates has characterized the 25th Place South embankment as being comprised of compacted fill derived from on -site sources. The compaction of the fill is undocumented, except for three testing episodes during June 1996 which were taken at "subgrade" elevation at curb, gutter and sidewalk locations. Although these tests indicated adequate compaction, the compaction levels and soil characteristics within the fill embankment are unknown. It is relevant to note that May 1996, when it is presumed that the majority of the fill was placed, was wet, with extensive rainfall throughout the month. Additionally, we were informed by Public Works staff that subgrade soils exposed during pavement patching on 25th Place South were in a "j el.lo-like" consistency. It is our opinion that the slope failure, lack of compaction testing, weather conditions during the assumed time of filling, direct observations of City staff, and conditions noted by Golder Associates all indicate that there is a substantial risk that the embankment is comprised of loosely compacted fill. Unless the strength and consolidation properties of the fill are determined, we can only conclude that the embankment soils present a long-term stability and settlement risk. GILES ENGINEERING l 1SSOCIATES, INC. City of Federal Way Project No. 6G-9707028 August 25, 1997 Page 3 • Golder Associates noted that buried topsoil encountered in the test pits was interpreted to indicate absent or incomplete stripping; no evidence of benching of the slope was observed. The presence of an unstripped topsoil zone, unknown condition within the fill, and lack of benching, introduces a risk of instability and long-term settlement of the embankment and improvements or fills constructed atop the existing fill. We do not concur with Golder's implied conclusion in the June 23 report that new fills which are allowed to settle for two weeks prior to foundation construction over this condition will result in adequate foundation support for residential construction. • The site grading alternatives presented in the Golder July 14 report indicate that retaining walls of major height (11 to 17 feet on lots 54 and 57) will be required in order to avoid filling east of the property lines with the given house and lot configurations. Because the land immediately east of the property line is already disturbed due to previous grading and construction, we understand that the City may optionally designate an allowable filling limit east of the property line. In much of this vicinity, a corridor of at least 12 feet width is disturbed. Additionally, the developer may optionally consider a reduced front yard setback and house footprint depth in order to reduce fill heights at the property line. In general, extension of the fill limit east of the property line will improve stability of the completed fill, by increasing the buttress of the existing, questionable fill. • Based on the Golder cross -sections of the grading alternatives, it appears feasible to provide a stable engineered fill within a "Benched SE Wall' alternative, possibly modified as described above to reduce wall heights. The sloped fill alternatives presented by Golder could also provide a stable configuration if designed with some additional characterization of existing fill. The sloped fill alternatives, however, present a greater long-term erosion hazard, and a larger amount of disturbance of adjacent native growth protection areas, than the "Benched MSE Wall" alternative. • The existing fill which will remain beneath new fills within the footprint and "bearing splay" of houses introduces a risk of long-term settlement. In our opinion, the available information regarding the existing fill indicates a significant risk would exist that homes built over, or influenced by, the existing fill could settle in the range of inches. If information is not provided which produces greater confidence in the support characteristics of the existing fill, it should be assumed that any improvements constructed over it would be subject to long-term settlements. ■ The existing roadway embankment may consolidate or subside over the long-term, possibly disrupting utilities. Due to the questionable, and presumed poor based on the GILES ENGINEERING ()SSOCIATES, INC. City of Federal Way Project No. 6G-9707028 August 25, 1997 Page 4 information available, compaction of the roadway fill, settlement in the range of inches should be considered possible. This magnitude of long-term settlement can cause increased maintenance and repair costs for pavement, sidewalks, and curbs. This magnitude of settlement can also cause leakage of utilities with associated risk of damage to the surrounding improvements. Both City and Lakehaven Utility District pipelines appear to be at risk of settlement -related damage. • Golder Associates recommends that a series of subsurface interceptor drains be installed on the face of the existing fill embankment, in order to drain springs and seepage. It is not clear whether alternate designs such as an interceptor drain upslope, or a blanket drain within the final fill embankment, were considered. The source of the groundwater was not evaluated on the west side of 25th Place South. We concur with the recommendation that groundwater be intercepted; the detailed design of the interceptor drain requires additional site information regarding the groundwater source, as well as coordination with detailed design of the lot grading design. RECOMMENDATIONS Our recommendations are based on the available information; if additional information is provided, these recommendations may require modification. We recommend the following: 1. Lot grading in the affected area should be designed to both provide a factor of safety equal to 1.5 or more for stability of the completed fill, and to provide adequate bearing capacity and settlement performance of the completed houses. Additionally, lot grading should incorporate drainage improvements to collect and divert subsurface water and mitigate effects of this water on both the roadway and lot fills. 2. Proposed methods for mitigation of the consolidation or subsidence risk affecting the roadway and utilities should be provided by the developer's engineers. Evaluation of potential embankment settlement issues will require additional geotechnical field exploration, such as borings, within the embankment fill. 3. The final design of the lot grading should be based on analysis of stability, to provide a factor of safety equaling 1.5 or greater. Characterization of existing fill, such as completion of borings in the embankment, is recommended for this analysis. 4, Groundwater conditions should be established, so that an interceptor drain on the west side of the roadway or other drainage alternates, can be reviewed. This may require additional field exploration, such as borings or test pits, west of the roadway. GILES ENGINEERING DISSOCIATES, INC. City of Federal Way Project No. 6G-9707028 August 25, 1997 Page 5 Due to the effect of water on the slides which occurred at this site, and based on typical weather patterns, the developer should be required to provide interim stabilization and erosion protection of the affected area prior to October 15, 1997. The design for lot grading should include all erosion control measures, and grading criteria, typically required for wet weather construction. These criteria may be dependent on the moisture sensitivity of the fill source. 6. In sununary, the stability, drainage, and subsidence issues for these proposed lots can only be adequately addressed, in our opinion, by characterizing the existing fill embankment. We strongly recommend that at least two borings be completed along the east curb line of the 25th Place South fill. These borings should be extended through the fill into native soils. Groundwater sources below or west of the roadway should also be evaluated, possibly in conjunction with this drilling. The scope and sampling plan for the borings should be established by the developer's engineers; we are available to review the specific proposed boring plan prior to drilling. 7. Due to the unknown conditions within the fill, we recommend that the City establish a baseline survey of horizontal and vertical position of the curb along 25th Place South. A periodic survey should then be completed, to evaluate potential lateral or vertical displacement. This would be especially critical if the lot grading is not completed prior to October 15, 1997. We appreciate this opportunity to provide these services. Please call if you have any questions or need additional information. We are available to review additional submittals received on these matters, or to meet with City staff to discuss these matters at your request. Respect illy submitted, GH.ES ENGINEERING ASSOCIATES, INC. t John E. Zipper, P.E. Regional Manager cc: Mr. Gary Barnett, P.E. Senior Development Engineer City of Federal Way FILE eOF33530 1ST WAY SOUTH TO: David Morrison, Parklane Ventures FROM: Jim Harris, Associate Planner DATE: October 4, 1996 (206) 661-4000 FEDERAL WAY, WA 98003-6210 SUBJECT: Application for Final Plat Approval for heritage Woods Division 1, Federal Way File No. SUB92-0005, Notice of Incomplete Application The City Community Development Review Committee (CDRC) has reviewed the September 5, 1996 application for final plat approval for Heritage Woods Division I. Please note that the preliminary plat approval expires on October 20, 1997. It is the City's policy that all major improvements including roads, storm drainage, and installation of water and sewer be completed prior to final plat approval. The Public Works Department is developing a punch list of incomplete and/or unapproved construction related items. Statutory warranty deeds must be submitted for all right-of-way and open space tracts. Applications for final plats must be reviewed by the City Council Land Use and Transportation Committee (LUTC) prior to action being taken by the City Council. The LUTC normally meets twice a month on the first and third Mondays. In order to give staff adequate time to prepare the staff report, all outstanding issues must be resolved at least two weeks prior to the next available LUTC meeting. This 'includes all fees being paid and bonds being posted. In addition, all required documentation must have been submitted. The following outlines what must be submitted and/or addressed before staff is able to complete its .review and develop a final plat staff report and recommendation. Please be advised that our review comments at this time are based on the information submitted to date. Additional comments and or corrections may be required based on submittal of additional or revised information. The final plat application is considered incomplete and returned for additional information. No further action on the final plat application will occur until the application is deemed complete. I. FINAL PLAT MAP 1. See enclosed redline final plat map and Public Works review checklist. Revise documents accordingly. 01 David Morrison October 4, 1996 2. A recently enacted state law requires all lot addresses to be shown on the final plat map. Please see the attached address list. Addresses may either be shown in numbers enclosed with a box on each lot, or the addressees may be listed on one of the final plat map sheets. If you have any questions about the provided address list, contact Ken Cornwall, Federal Way Lead Plans Examiner at (206) 661-4123. 3. Street numbers must be shown on the map on sheet 1 of 7. 4. Delete reference to 284th Court South on sheet 3 of 7. Lots 21-27 will be addressed off South 280th Place. 5. On sheet 4 of 7 show an arrow from the words "Tract F" to the actual parcel. 6. Note 13 on sheet 5 of 7 states, "Tract F is for future development". Tract F is actually a wetland buffer and will be subject to the note identified in section III item 7 of this memo. Tract F should not be considered for future development. 7. The language for note 11 sheet 5 of 7 must be revised. See section III item 7 of this memo for suggested language for the note. 8. The language for note 7 sheet 5 of 7 is not appropriate as proposed. See section II items 6 and 7 of this memo regarding geologically hazardous areas, and see the attached letter dated September 19, 1996 to David Morrison regarding unresolved geologically hazardous area issues. 9. The first sentence of the downspout note on sheet 7 of 7 must be removed. The first sentence contradicts the remainder of the note, and all lots in Division 1 have been provided downspout connections to a drainage system. 10. Note 15 on sheet 5 of 7 must include language regarding minimum finished floor elevations, as provided in the attached memo from Lakehaven Utility District to Jim Harris, dated September 26, 1996. 11. A note regarding Native Growth Protection Easements (NGPE) shall be added to the plat notes on sheet 5 of 7. Suggested language for the NGPE notes is as follows: "Native Growth Protection Easements (NGPE) are areas where no vegetation and/or trees are to be cut and/or removed, except those which are dead, dying, diseased, or considered a potential safety David Morrison October 4, 1996 hazard. Any vegetation and/or tree removal in the NGPE requires the prior approval of the City of Federal Way Community Development Services Department. No structure shall be constructed and or located in a NGPE except as authorized by the Department of Community Development Services. " H. CONDITIONS OF PRELIMINARY PLAT APPROVAL All conditions of preliminary plat approval of Heritage Woods are required to be met prior to approval by the City Council. The following is a list of all conditions of preliminary plat approval (shown in italic font). We have attempted to identify those conditions that have already been met. In those instances where the City does not have documentation on how a condition has been met, we have explained what needs to be submitted to verify compliance with the condition. This review is based on information that you have submitted to date. Upon resolution of all outstanding issues and receipt of the requested information, we will review the revised submittal and a staff report will be prepared for the LUTC and City Council. A meeting will be scheduled upon substantial completion and inspection of improvements. 1. Pursuant to section 20.130.30 of the Environmental Policy Ordinance, all mitigation measures of the April 8, 1992 determination of nonsignicance are incorporated by reference as conditions of this approval. Failure to comply with the mitigation measures shall constitute grounds for suspension and/or revocation of this approval. STAFF RESPONSE: See comments in section III of this memo below regarding compliance with SEPA conditions. 2. Approval of this proposed preliminary plat is subject to approval of rezone application number RZ-92-0001. In the event that rezone application number RZ- 92-0001 is modified or denied, any action to approve this preliminary plat shall be deemed invalid and a new public hearing required. 3 David Morrison October 4, 1996 STAFF RESPONSE: The ordinance for rezoning a portion of the site will be developed by the City staff and will be attached to the staff report to the LUTC and City Council. The ordinance adopting the rezone will be processed and adopted concurrently with the final plat approval for Division 1. 3. To the maximum extentfeasible, existing natural vegetation shall be utilized within all landscape buffer areas as required by the Director of Community Development. As proposed, the applicant will provide a fifteen foot wide buffer of native vegetation along the rear of lots adjoining the north, south and west property lines of the site. STAFF RESPONSE: This condition has not been completely met. With the exception of areas approved for clearing and grading, natural vegetation has been left. The rear of lots abutting the north and west site perimeter have a 15 foot wide Native Growth Protection Easement (NGPE). An additional note must be added to the final map regarding clearing limitations in the NGPE. Appropriate language for the additional note is suggested in Section I, item 11 above. 4. Prior to final plat approval, lot number 59 shall be reconfigured to be located entirely outside of any required 100 foot wetland setback area. STAFF RESPONSE: This condition has been met. Lot 59 on the preliminary plat map has been renumbered lot 1 on the final plat map. Lot 1 on the final plat map is configured so, that it is entirely outside the required 100 foot wetland setback. 5. Prior to final plat approval, all proposed usable open space shall be dedicated to the City as required by the Parks Director. As proposed, the applicant will construct tennis court facilities as approved by the Parks Director. As proposed, the applicant will erect a sign or monument regarding 'Old Military Road' as approved by the Parks Director. STAFF RESPONSE: This condition has not been met. The final plat map shows Tract A being dedicated to the City of Federal Way. The City is currently processing a Use Process I application to modify this condition of preliminary plat approval. The request is to replace the required tennis court with trees and an irrigated lawn area with a minimum dimension of 140' X 200' . The process I notice was published in the Federal Way News on September 30, 1996. The site has also been posted for the process I application. Comments on the process I application must be received by October 14, 1996. A written decision on the process I application will be issued by the Director of Community Development Services by October 28, 1996. If the Process I request is approved, appropriate 4 David Morrison October 4, 1996 bonding must be provided prior to approval of Division 1 to allow deferral of the park improvements. A statutory warranty deed for dedication of the park tract must be submitted prior to approval of Division 1. A proposal regarding the signage text, appearance, location , construction details, timing, etc. for Old Military Road must be submitted to the Parks Department for review and approval prior to approval of Division 1. 6. No general site clearing or grading shall occur on or within 25 feet of geologically hazardous areas located on lots 52, 53, 56, 57 and 59. Any building construction located within these sensitive areas or setbacks shall be by piling or pier type foundation construction as required by the Building Official, to minimize grading and disturbance within the geologically hazardous area. Upon completion, all disturbed areas shall be replanted as required by the Building Official. STAFF RESPONSE: This condition has not been met. You have requested to modify this condition to allow filling and grading on areas previously identified as geologically hazardous areas. See attached letter dated September 19, 1996 from Jim Harris to David Morrison regarding our response to your request to modify this condition. Additional information has been requested from .you regarding the geologically hazardous areas, and request to modify this condition of preliminary plat approval. Additional information has been requested that may show steep slope areas were not accurately represented during the preliminary plat phase. Fill placed on lots 56, 57 and 59 for road construction will make home construction on these lots difficult. A comprehensive approach to site development on the constructed slopes and pre- existing slopes should be resolved prior to final plat approval. If the steep slope issue is not further addressed at this time, a note to the effect of condition #7 below will be placed on the face of the plat map. 7. Individual homeowners for lots 52, 53, 56, 57 and 59 shall be responsible for providing the City with services of a qualified professional engineer for purposes of reviewing and inspecting pier or piling type residential construction located within geologically hazardous areas, as required by the Building Official. STAFF RESPONSE: This condition has not been met. See response to item 6 above. 5 David Morrison October 4, 1996 8. The developer shall be responsible for providing the City with services of a qualified professional engineerforpurposes of reviewing and inspecting any street or utility work located within geologically hazardous areas, as required by the Public Works Official. STAFF RESPONSE: This condition has been met through the construction phase of the project. 26th Avenue South and 25th Place South and associated utilities were constructed within small portions of geologically hazardous areas. The developer did provide the services of a testing laboratory for confirming compaction of roadway subbase and crushed rock courses during construction. 9. Due to potential erosion hazard and impacts to environmentally sensitive areas, clearing shall be limited only to the months of April through October. STAFF RESPONSE: This condition has been met. Site clearing and grading was generally limited to occur between April and October. When weather conditions were favorable, exceptions were approved to allow clearing and grading between October and April. 10. Retention/detention facilities used to control runoff from the site to off -site drainage courses shall be located in a surface water tract to be dedicated to the city at the time of final plat approval, as required by the Public Works Director, unless located within improved City of Federal Way rights -of -way. All retention/detention facilities shall be landscaped to provide a visual buffer from surrounding properties. A landscape plan shall be submitted for approval by the Director of Community Development Services prior to issuance of construction permits. STAFF RESPONSE: This condition has not been met. The final plat map shows Tract E being dedicated to the City of Federal Way for Stormwater Detention Facilities. Tract E includes the pre-existing artificial pond that is incorporated into the storm drainage system. Final inspection and approval of the surface water facility construction is required prior to approval of Division I. The Public Works inspector is developing a punch list regarding construction of all stormwater facilities. Final acceptance and dedication of the surface water system improvements in Tract E are to be deferred until final plat approval for Division 2, due to potential for on -site erosion and additional maintenance during development of Division 2. Note 12 on Sheet 5 of 7 shall be modified to reflect future dedication of the tract 11 David Morrison October 4, 1996 concurrent with Division 2 recording or upon request by the Public Works Director. An approved plan for buffering the storm drainage facilities is included as part of the approved wetland creation and enhancement plan. The predeveloped vegetation which served as a potential buffer on the northwesterly end of the detention pond was removed during construction of the pond. The removal of this vegetation was unauthorized, is in a wetland buffer, and provided visual buffering of the stormwater facilities. Mitigation in the form of replanting will be required prior to approval of Division 1. A planting plan/wetland buffer restoration plan must be submitted to and approved by the Community Development Services Department, and implemented by you, prior to approval of Division I. 11, Prior to final plat approval, those portions of the surface water facilities necessary to retain/detain, convey, and treat the flows discharging from the site shall be constructed and operational. STAFF RESPONSE: This condition has not been met. The Surface Water Pond has been constructed. Seeding, mulching and repair of the biofiltration swale must still be completed and approved. Final acceptance from the Public Works Department for functionality and operation of all stormwater facilities must be granted prior to final plat approval for Division 1. The Public Works Department is developing a punch list of construction related items. 12. A IS foot gravel access shall be provided along the entire length of each biofiltration Swale for maintenance as required by the Public Works Director. The biofiltration swale and gravel access shall be located in a surface water tract to be dedicated to the city prior to final plat approval. STAFF RESPONSE: This condition has not been fully met. See response in item 10 above. A 15 foot gravel access to the biofiltration swale serving the development has been constructed. Final approval from the Public Works Department is required for the entire storm drainage system prior to Division 1 final plat approval and release of any associated performance bonding for Division 1. 13. In some cases, on -site surface water infiltration systems may be suitable for use on individual lots depending on soil conditions. This type of system shall be used where suitable. To determine the suitability of the soil for infiltration systems, a soils report that includes percolation tests and a soil log taken at six foot minimum depth shall be submitted by a professional engineer, or soil specialist. 7 David Morrison October 4, 1996 This shall include, at a minimum, information on soil texture, depth to seasonal high water, and the occurrence of mottling and impervious layers. The report shall also address potential down gradient impacts due to increased hydraulic loading on slopes and structures. If the soils report is approved, the infiltration systems shall be installed prior to occupancy of the residence. A note to this effect shall be placed on the face of the final plat map. The drainage plan and the final plat map shall indicate each lot approved for infiltration. STAFF RESPONSE: This condition has not been completely met. A soils analysis was completed as part of the design work for the plat infrastructure. This analysis found the soils to be poor in infiltration potential. As such, positive storm drainage connections to the piped storm drainage system were provided for each lot. A note to that effect has been provided in the Final Plat drawings. However, the note must be revised as suggested in section I, item 9 of this memo. 14. Existing on -site surface water ponds shall be retained as pan of the storm drainage system and shall be utilized as a one -cell wetpond for treatment of runoff prior to entering the detention facilities or biofiltration swale. Discharge into the pond shall be oriented to maximize the retention and settlement times of the water in the pond. The pond shall be located in a surface water drainage tract to be dedicated to the city prior to final plat approval, as required by the Public Works Director. STAFF RESPONSE: This condition has not been completely met. The existing on -site pond has been incorporated into the storm drainage system as a one -cell wet pond. Routing of the storm water has been designed to maximize the retention time and treatment effectiveness in the pond. The pond is located within Tract E along with the other associated storm drainage facilities. Field inspection and final approval by the Public Works Department is required and will be included in the punch list. See response to item 10 above regarding dedication and acceptance. Dedication of Tract E shall be deferred until final plat approval for Division 2. As such, Note 12 on sheet 5 of 7 shall be modified. 15. A geotechnical report shall be prepared by a licensed geotechnical engineer to address recommended designs for proposed roadways. The report shall detail soil and groundwater conditions. Recommendations to ensure integrity of future roadways shall be subject to review and approval by the Public Works Director. E: STAFF RESPONSE: This condition has been met. Pavement Design Recommendations, a report by GeoTech Consultants, Inc., was prepared on May 8, 1995 for the proposed street improvements in the plat. This report provided detailed soil and groundwater conditions. Further pavement design for Military Road South was provided by Jaegar Engineering in April, 1996 with review and final approval by the Public Works Director. 16. A temporary paved turn -around will be constructed at the westerly end of 25th Place South in accordance with Section 2.07 of the King County Road Standards. Sidewalks shall be constructed to extend through the temporary turn -around area. Temporary easements shall be provided and shall be placed on the face of the final plat as required by the Public Works Director. STAFF RESPONSE: This condition has not been completely met. The temporary cul-de-sac has been paved. The extension of sidewalks through the temporary cul- de-sac are not necessary at this time. A written request to amend the approved design to delete the sidewalks through the cul-de-sac must be submitted for review and formal approval, prior to approval of Division 1. This will more easily accommodate the future extension of the roadway and elimination of the temporary pavement areas of the turn -around. The temporary easements are to be shown on the Final Plat drawing. 17. A 10-foot utility easement shall be provided along the front of all lots and tracts located adjacent to the proposed street rights -of -way as required by the Public Works Director. STAFF RESPONSE: This condition has not been completely met. This 10-foot utility easement has been accommodated by Easement Provisions and Reservations note on sheet 7. of 7 of the Final Plat drawings. 18. Applicant is required to construct Military Road South to a 3 lane configuration with curb, gutter, sidewalk and bike lanes on both sides of Military Road. STAFF RESPONSE: This condition has not been met. In 1994 and 1996, the applicants requested modifications to requirements along Military Road South. Specifically, the requests were to reduce the width of sidewalk along the west side of Military Road, eliminate the landscape median within the left-hand turning lane, eliminate the bicycle path, curb, gutter, - six -foot -wide landscape strip and eight -foot -wide sidewalk along the east side of Military Road and widen the easterly side of Military Road an additional five feet to create a shoulder. Pursuant to Resolution 92-122 (Resolution granting Preliminary Plat approval), minor modifications may be granted subject to Use Process I procedures. After issuing public notification, and considering all information related to the request, the City issued a decision on May 24, 1996. The City granted modifications E David Morrison October 4, 1996 related to improvements along the east side of Military Road only. As such, Military Road will be constructed to include 3 lanes of travel, a bike path, vertical curb, gutter, and concrete sidewalk on the west side only, and asphalt wedge curb and eight -foot -wide asphalt shoulder along the east side (to provide for pedestrian and bicycle circulation). Construction of the east portion of the roadway, the final pavement overlay, and striping for the lanes and bike path have not been completed. This condition must be completed prior to final plat approval by the City Council. M. SEPA CONDITIONS: 1. All development activities shall be designed and constructed in accordance with recommendations and conclusions contained in the 'Report of Geotechnical Investigation', dated June 19, 1990 and prepared by Geotechnical Services for the proposed development, as required by the Public Works Director and Building Official. Supplemental geotechnical analysis and recommendations may be required by the Public Works Director or Building Official for development activities located within sensitive areas. STAFF RESPONSE: This condition has not been met. The subdivision improvements were developed in accordance with geo-technical recommendations. The Public Works Department approved engineered plans for construction of the subdivision improvements. Field verification of completion of the recommendations must still occur, and will be included in the punch list. 2. The Public Works Director may require that trees, shrubs and groundcover be retained within clearing, grading and construction limits except where necessary for installation of approved improvements, or may require replacement of vegetation in disturbed areas until future home construction occurs. STAFF RESPONSE: This condition has not been met. A clearing limits plan and erosion control plan were designed by a licensed engineer and approved by the City Public Works Department. As stated in a September 20, 1996 letter to David Morrison, ESC measures and facilities must be installed, functioning and maintained throughout the life of the construction. Additionally, the letter cited action which must be taken immediately to address the issue of erosion. The items in the September 20, 1996 letter must be implemented in order to meet this condition. 10 David Morrison October 4, 1996 3, Lot 59 shall be reconfigured to be located outside of the 100 foot setback of adjacent wetland areas, or an easement shall be recorded against the lot to preclude homeowner use and development of all lot area located within the required 100 foot setback, prior to recording of the final plat. STAFF RESPONSE: This condition has been met. Lot 59 on the preliminary plat map has been renumbered Lot 1 on the final plat map. Lot 1 is configured to meet SEPA mitigation measure #3, as the lot is located outside the 100 foot wetland setback. 4. A final wetland mitigation plan shall be approved by the Director of Community Development prior to beginning any onsite construction work associated with the subdivision. The plan shall include the following information: a. Mitigation Plan including the following elements: 1) Environmental goals and objectives, including public access and buffer measures. 2) Performance standards. 3) Detailed construction plans. 4) Timing. 5) Monitoring program for a minimum of five years. 6) Contingency plan. 7) Performance bonding in an amount of 120 percent of the costs of implementing each of the above elements. b. Mitigation shall be designed to improve the functions and values of impacted wetland and setback areas, and shall include the following minimum replacement ratios for each acre impacted: 1) For forested wetlands with at least 20 percent of the surface area covered by woody vegetation greater than 20 feet in height, the replacement ratio shall be a minimum of 3:1. 2) For scrub -shrub wetlands with at least 30 percent of its surface covered by woody vegetation less than 20 feet in height as the uppermost strata, the replacement ratio shall be 2:1. 3) For emergent wetlands with at least 30 percent of 'the surface area covered by erect, rooted, herbaceous vegetation as the uppermost vegetative strata, the replacement ratio shall be 1.5:1. 11 David Morrison October 4, 1996 4) The replacement ratio for all other wetlands shall be 1.25:1. STAFF RESPONSE: This condition has not been completely met. See additional staff comments under sub items 4(c) and 4(d) below. A wetland mitigation, creation and enhancement plan was approved by the City prior to issuance of final construction plans for the subdivision improvements. The wetland mitigation, creation and enhancement plan meets the requirements of SEPA mitigation measure 4 (a & b). c. All required wetland mitigation improvements, except monitoring, shall be completed and accepted by the Director of Community Development prior to submitting the final plat for final approval. In any event, all mitigation work shall be completed within six months from the time wetland or wetland setback areas are initially disturbed through related subdivision construction activity. STAFF RESPONSE: This condition has not been met. As of October 2, 1996, you have not submitted to the City a wetland as -built report. Upon submittal of the wetland as -built, the City will review the document for compliance with the approved plan. d. The applicant shall pay for services of a qualified professional selected and retained by the City to review the wetland mitigation plan and other relevant information, conduct periodic inspections through the construction phase, issue a written report to the Director of Community Development stating the project complies with requirements of the mitigation plan, and to conduct and report to the Director on the status of the monitoring program. STAFF RESPONSE: To date, this condition has been met. The applicant has paid for the services of the City's consulting wetland biologist to this date. Further billing will be required when the wetland as -built and restoration plans are submitted and reviewed. 5. Prior to final plat approval, the applicant shall construct downstream drainage improvements identified in the "Preliminary Drainage Analysis" dated December 20, 1991 and prepared by Jaeger Engineering for the site, as required by the Public Works Director. In lieu of constructing these improvements, prior to final plat approval and at the discretion of the Public Works Director, the applicant may pay $60,696.00 as their pro-rata contribution towards implementation of these improvements. STAFF RESPONSE: This condition has not been met. The developer has selected to pay the pro-rata contribution towards design and construction of the 12 David Morrison October 4, 1996 downstream drainage improvements. The amount to be paid by the developer prior to approval of the Division 1 final plat is $60,696. A partial contribution based on the ratio of lots in Division 1 to the number of lots in the entire subdivision is not recommended since Division 2 development area has been logged, resulting in an increase in runoff from Division 2 at this time. 6. All homes located within this subdivision shall be properly sound insulated to achieve a level of 45 Ldn within general habitable space and 40 Ldn within bedrooms, consistent with the Uniform Building Code and other regulations, as required by the Building Official. STAFF RESPONSE: This condition will be implemented during permitting and construction of homes. The condition has been met by note #6 on sheet 5 of 7 on the final plat. 7. Any development within designated open space areas shall be designed and constructed, as required by the Director of Community Development, to protect and enhance wildlife habitat to the maximum extent feasible. This effort may include but is not limited to revegetation and restoration of disturbed areas, retention and/or replacement of significant vegetation, and use of vegetation or other features which provide habitat for native wildlife species. STAFF RESPONSE: This condition has not been met. Prior to site construction, an approved wetland mitigation, creation and enhancement plan was approved by the City of Federal Way. See response under SEPA item 4(c) above, field verification of the wetland planting has not been conducted. An as -built of the wetland creation mitigation and enhancement plan has not been submitted for City review. The area north of the storm water pond was to be retained as native vegetation and was significantly disturbed and graded during site development. A restoration plan must be developed and submitted for review for all unauthorized clearing. Implementation of restoration must occur prior to final approval of Division 1. In order to assure the future integrity of the wetlands and wetland buffers, note #11 on sheet 5 of 7 on the final plat shall be amended as follows: "Tracts C, D, and F are environmentally sensitive areas and are permanent open space tracts. The tracts are set aside and reserved for permanent open space for the benefit of present and future owners of lots in this subdivision. 13 David Morrison October 4, 1996 No building shall be constructed or located in tracts C, D, or F and such tracts shall not be further subdivided or used for financial gain. Any vegetation removal, maintenance or other activity in tracts C, D, or F requires the prior approval of the City of Federal Way Community Development Services Department." Beyond required frontage improvements, the applicant shall construct Military Road South widened to 4 lanes with provisions for bicycles, sidewalks, signal modifications, illumination, street trees, and property acquisition from I-5 to South 288th Street, as required by the Public Works Director prior to final plat approval. In lieu of constructing these improvements, prior to final plat approval and at the discretion of the Public Works Director, the applicant may pay $11,600 as their pro-rata contribution towards implementation of these improvements. STAFF RESPONSE: This condition has not been met. The developer has selected to pay a pro-rata contribution in lieu of constructing street improvements beyond the frontage of the site. The amount to be paid for Division 1 is $5,452.00 which is 47 percent of the $11,600. This contribution is based on a ratio of the 52 lots in Division 1 to the total of 111 lots in the approved preliminary plat. 9. Prior to final plat approval, Military Road South shall be paved from the north and south termini of the required right-of-way improvements abutting the site with tapers to match into the existing pavement improvements. The tapers shall be provided as approved by the Public Works Director. STAFF RESPONSE: This condition has been met with the exception of construction approval. Tapers to Military Road South as shown on the design plans and approved by the Public Works Department have been provided on both the north and south ends of the required street improvements for Division 1 to match into the existing pavement improvements. Tapers for Division 2 will be provided in conjunction with that Division's development. 10. Prior to final plat approval, a north bound left turn lane on Military Road South at the intersection with South Star Lake Road shall be designed and constructed, as required by the Public Works Director. STAFF RESPONSE: This condition has not been met. A north bound left turn lane at the intersection of Military Road South and Star Lake Road has been designed to the approval of the Public Works Department. The final pavement 14 David Morrison October 4, 1996 overlay and striping for the lane has still to be completed prior to release of any associated performance bonding and City Council approval of the final plat for Division 1. 11. Prior to final plat approval, the applicant shall coordinate with the City and King County the modification of the signals at South 288th Street and South 272nd Street, respectively, through adjustments, in timing and phasing to mitigate the LOS F operations of the intersections, as required by the Public Works Director. STAFF RESPONSE: The developer has installed conduit along the site's frontage on Military Road South to provide for future signal interconnect between S. 288th Street and S. 272nd Street. The future interconnect will assist in timing and phasing between the signals to improve the level of service at each intersection. 12. Prior to final plat approval, the applicant shall design and construct a traffic island and signage at the intersection of South 284th Streetl Military Road South, to route westbound traffic from South 284th Street right only onto Military Road South, as required by the Public Works Director. STAFF RESPONSE: This condition will be implemented with approval of Division 2. A traffic island and signage at the east side intersection of existing South 284th Street and Military Road South has been designed to the approval of the Public Works Department. Since these facilities coincide with the development under Division 2 of the internal plat road of S. 284th Street at its intersection of Military Road South, construction of the island and signage have been deferred to; completion of Division 2. 13. Prior to final plat approval, the applicant shall prepare and submit for approval and recording a Transportation Management Plan (TMP) that is acceptable to METRO and the City of Federal Way Public Works Director. STAFF RESPONSE: This condition has not been met. A TMP is intended to encourage reduction in traffic -generation through the use of car pooling, subsidizing use of buses, and other means. The site is served by Metro along Military Road South. Also, the widening of Military Road South serves, in part, as mitigation for the anticipated traffic increase from the plat. The applicant has not completed a TMP or provided the City with documentation verifying that METRO has been contacted. 14. A minimum ten foot wide paved or concrete pedestrian path shall be constructed from 23rd Court South to 22nd Avenue South prior to final plat approval, as 15 David Morrison October 4, 1996 required by the Public Works Director. The entire path shall be provided for general public use by means of dedication, easement or other acceptable mechanism. STAFF RESPONSE: This condition has not been met. The pathway to be located in Tract B has not been constructed, and must be completed prior to approval of Division 1. IV. OTHER COAVAENTS 1. Please address comments in attached memorandum from Lakehaven Utility District dated September 26, 1996. 2. Provide letters of water and sewer acceptance from Lakehaven Utility District. SL'AE%IARY Please submit three copies of all requested documents including a revised final plat map with the requested changes at your earliest convenience in order for the City to further review the application. All changes and revisions must be made on full plan sheets and documents, addendums are not acceptable for revisions. This correspondence is being returned to you at this time so that you may continue to finalize your final plat application. Should you have any questions, please call Jim Harris at (206) 661-4019 regarding planning issues, or Gary Barnett, Senior Development Engineer and Stephen Clifton, Development Services Manager at 661-4109 and 661-4196 respectively regarding Public Works issues. Encl: 1) Red Line Final Plat Map 2) Public Works Final Plat Review Checklist 3) September 19, 1996 letter to David Morrison from Jim Harris 4) September 26, 1996 memorandum from Lakehaven Utility District to Jim Harris 5) Address list dated September 26, 1996 from Ken Cornwall to Jim Harris C: Ztephen Clifton, Public Works Development Services Manager Gary Barnett, Senior Development Engineer Jim Jaeger, Jaeger Engineering, 9419 S. 204th Place, Kent, WA 98031 LAPRMSYS\D0CUMENT\SUB92 00.05\PW100296.DOC March 12, 1996 SENT VIA FAX & MAIL - 661-4129 12 PAGES Mr. Cary Roe Director of Public Works 33530 1 st Way South Federal Way, WA 98003-6210 Re: Heritage Woods - City of Federal Way Request for Variance to Ordinance for Standard Road Improvements - Military Road Dear Cary: PARKLANE Park Lane Executive Center 31620-23rd Avenue South #320 Federal Wav, Washington 95003 Telephone: (206) 946-3652 Fax:(206) 946-3580 We respectfully request variances to the Standard Road Improvement Ordinance # 90-43-2 (Chart 110-1) 2/27/90, to Military Road R.O.W. fronting our Heritage Woods project. In support of this request for variances I am incorporating a letter of recommendation from our Traffic Engineer, Mr. Christopher Brown, P.E. who has carefully analyzed your code and standards and the existing conditions along Military Road both within The City and King County. We have asked his recommendations for what is fair and reasonable and lawful in order to satisfy the safe and efficient use of Military Road with the development of our plat of Heritage Woods. You will note that Mr. Brown has reviewed the project for both S.E.P.A. aspects, as well as from a traffic safety point of view. Mr. Brown has assured me that he has also analyzed the standards and future plans of King County and W.S.D.O.T., to ensure that his recommendations are compatible with all other jurisdiction's future plans and standards to ensure that The City will be able to qualify for future funding programs such as the Transportation Improvement Board (T.I.B.). Therefore, based on our Traffic Engineer's recommendations we propose, as our fair and reasonable responsibilities, to do the following: 1. Design Military Road adjacent to our project showing the various improvements that we, the developer, will complete with the development of our plat Heritage Woods and what will be completed by others when The City has secured future funding to WC are committed to quplity. vol tea erd servier to f llf fl to ), e1114eowers dn'111;1% andrm—ed ffrrir expert ration'. -2- 3/12/96 complete Military Road to The City's "final" standard. See Exhibits 1, 2, and 3 hereto attached showing the project location, Exhibit 1, and the typical cross section for the worst case fill section, Exhibit 2, and for the worst cast cut section, Exhibit 3, along this portion of Military Road. 2. Install a 3-lane road section with 12 foot lanes, the center lane serving a 2-way, left turn lane. Mr. Brown has recommended that we maintain a full left turn lane for the entire length of improvement, without a landscaped median, to accommodate more left hand turning traffic and improve safety through our two intersections. 3. Install curb, gutter, 5 foot bike lane, 6 foot planting strip and a 6.5 foot concrete sidewalk on the west side only. 4. - Leave the existing shoulder and drainage swales on the east side with any revision or modification marked "future -by others" on the approved plans. 5. Provide street illumination on the west side. 6. Provide street trees in the planting strip on the west side. 7. Provide signage and marked crosswalks at both access street directing bicyclists and pedestrians on the east side to use the west side facilitates. 8. Assist The City in obtaining grant funds for the immediate reconstruction of the Star Lake Road intersection. 9. Construct a bus turn -out on the west side of the traffic lane as approved by Metro, if deemed necessary by The City. Therefore, we are asking for the following specific variances to your Ordinance and Code: -3- 3/12/96 1. The width of sidewalk on the west side be reduced from 8 feet to 6 1 /2 feet. We find there is no reasonable argument for this width of sidewalk adjacent to a single family residential neighborhood. Also, Mr. Brown cites the concern for safety with an overly wide sidewalk that may attract bicyclists and "roller bladders" who may cause safety problems to pedestrians. 2. Eliminate the landscape planting islands within the left hand turning lane to accommodate more left hand turning vehicles, making Military Road safer for left hand turning motorists. 3. Eliminate the bicycle path, curb, gutter, 6 foot wide landscaped strip, and 8 foot wide sidewalk long the east side of Military Road adjacent to our plat. We would encourage bicyclists and pedestrians on the east side to use the west side facilitates by installing signage and marked crosswalks at both access streets. We would also provide street lights along the west side which together with the vertical curb and landscaped strip, would make the west side brighter and safer. We would widen the easterly side of Military Road an additional 5 feet beyond the traffic lane, and paint a white line at this location, to make the east side safer for the occasional pedestrian and bicyclist not attracted to the west side improvements. We respectfully request that you re -review your code requirements that require us to complete the full arterial standards for both sides of Military Road adjacent to our project, recognizing that it is not economically feasible for our single family development to bear the full cost of improving Military Road to your desired standards. We also ask you to evaluate our Traffic Engineers recommendation for what should be required for our project and what improvements can safely be deferred and completed by others, or by future funding programs with King County and other agencies. - 4 - 3/12/96 We also ask you to recognize the language used by the Hearing Examiner when Federal Way Staff petitioned the Examiner to reconsider the Hearing Examiner's initial recommendation that we be required to improve only the west side of Military Road, not both sides. The Hearing Examiner, in his final recommendation after being persuaded by Staff, stated that "...curbs, gutters, sidewalks and bike paths should be required on both sides of said (Military) road.". The operative word is "should". It is not will or shall. Thus we feel strongly that the Public Works Director has the discretionary power to relax this costly and burdensome condition. We believe he should be willing to do so since there are statutory limits confining our street improvement requirements to our side of the road R.O.W.. Also, your Staff has advised us that you have granted similar variances on arterial roads, where the costs are prohibitive to a single developer, with a project on one side of an arterial road. The Hearing Examiner in using this language is aware of the very distinct limit on what can be required of a development, outside of S.E.P.A.. As our Traffic Engineer, Mr. Brown, has advised there are no public health safety or welfare issues associated with our plat as it relates to Military Road and absent mandated requirements improving the property of another person, or of a public agency is, in fact, a tax. That tax cannot be levied on us, the developer of property on one side of a public R.O.W.. Since the east side improvements are not "...reasonably necessary as a direct result of the proposed development or plat..." the costs would be deemed a tax or a fee and, as a consequence, would be contrary to recent court decisions. For reference, these decisions include a series of well established cases such as Nollan vs. California Coastal Commission, Unlimited vs. Kitsap Count and Presbytery of Seattle vs. King County. The delimitation of the amount of road construction on Military Road that can be required has been addressed by Statute (RCW 82.02.010) and by a fairly recent case, Southwich vs. Lacey, which concluded "a municipal body cannot shift the social costs of development onto a developer under the guise of regulation. Such costs shifting is a tax.". In summary, we request that you consider the economic, technical and legal aspects of your Code and Ordinance, and grant the three requested variances, from an 8 foot sidewalk to 6.5 feet on the west side of Military Road and the elimination of the landscape median from the left turn lane and the elimination of the curb, gutter, landscape strip and 8 foot wide sidewalk on the east side of Military Road. The granting of the variances will recognize what is fair and reasonable with respect to the impact of our development on Military Road and avoid a protracted and costly legal imbroglio. Your approval to construct the improvements we propose to Military Road will adequately address the -5- 3/12/96 vehicular, pedestrian and bicyclist needs generated by our development, and provide a safe and greatly improved traffic flow on Military Road. Sincerely, �'��' David Morrison cc Jim Jaeger Chris Brown Christopher Brown ar Aaaociatcs 879 P-ainicr Avcnue N.. Suite A-201 Renton. WA 98055-1380 (206) 772-1188 Fax M-4321 Mr. David Morrison May 9, 1994 Parklane dentures, Inc. Park Lane Executive Center 31620 23rd Avenue S. Federal way, WA 98003 Re: Heritage Woods Cit of Federal way Mil tart' Road Design Elements Dear Mr. Morrison: In accordance with your request we have•cormleted a, review of the various traffic studies performed for the subject plat. In addition, we have reviewed the accident data for the three year period 1990-1993 on Military Road fwom S. 304th Street north to S. 268th Strast and other design elements. The accident analysis was undertaken to determine which locations were statistically significant (at p=0.99) and, as a consequence, could be affected (improved) by a construction Program• as distinct fzam locations whe=e the accident . experience reflects a non-random event and thus is beyond relief by normal construction techniques. (That is to say, we are identifying locations where accidents are dua to elements beyond remediation. Typically these include accidents caused by driver error, bad weather and so on.) In the entire Length of the two -and -a -half mile corridor of Military Road from S. 268th to S. 304th, only two locations have accident frequencies with statistical significance. Military Road at S. 304th Street. Military Road at Star Lake Road. The importance az this finding is two -fold. First, the Star Lake Road intersections (both north .and south) are presently unsafe with statistical certainty. Accordingly, it is incumbent upon the city of Federal Way to implement corrective action or remediation. On the strength of the accident analysis they have a•duty to address these hazardous locations. Traffic Engineers of Tranaportation Planners Mr. David Morris May 9 , 1994 page 2 The second location at S. 304th Street is similarly within the city and has statistical significance in terms of accident causation. This is some distance to the south of the instant plat and clearly beyond further review on your part. This is especially true since no site traffic is expected to traverse the intersection. For the plat, the most important finding is that there is no hazard associated with either of the two site access street intersections - S. 282nd Street and S. 284th Street. Next, we have also reviewed the proposed pedestrian elements (sidewalks). I note that the design standard (Chart 110-1, Minor Arterial) calls for 8 foot widths. This may be contrasted with Seattle standards at 5 feet for principal and minor arterials (Seattle §trjetart , pages 48 and 49) and in King County (4nq County Road Standards drawing No. 2) where 8 feet wide sidewalks are called cut in business districts and 6.5 feet widths in residential areas. In order to maintain future roadway design uniformity and continuity between Federal Way and King County, I would suggest that you request a variance from the above noted Federal Way 8 foot sidewalk standard. You may wish to note that overly wide sidewalks in an area such as this may well induce young bicyclists to not use the bi.-.e lanes but, instead, use the sidewalks. This may impose tor, liability in the future. In terms.of volumes, you can expect a range from. 5 to 25 pedestrians per foot of width per minute. Thus, an 8 foot oxide sidewalk can carry anywhere from 2,400 to 12,00C pedestrians per hour. From a pedestrian capacity viewpoint, a 5 foot sidewalk would be more than sufficient. However, a 6.5 foot sidewalk will meet the adopted standards of the county and thus ensure matching funds on conjoint projects. There is little need for an 8 foot wide sidewalk in a residential area. It assuredly will increase future city maintenance costs. Finally, and of soma importance, there are no significant pedestrian generators on the east side of the road. Next, at our meat-ing with city of Federal Way Department of Public Works (DPW) staff last Thursday we discuased the re -building of Military Road South from the southerly Star Lake Road intersection to S. 284th Street. If a full roadway section (curb -to -curb) is to be built, it will entail the removal of a significant number of very mature trees along the east side. Regardless, it will be a very costly undertaking Mr. David Morri May 9 , 1994 page 3 and, given that high cost, you should request a variance from that condition. Farther, with existing and functioning drainage swales located along the east side, the re -building of that half of the street may not be in the best interests of the residents located along that side. I expect your drainage specialists have reviewed that element in any case. .. It is clear that the rebuilding of Military Road, especially if it includes the east side of the roadway as distinct frogs a *half street improvements", is extremely expensive. From my past experience, I might add, it is well beyond -any SEPA requirement. In view of this untoward expense, you should request a variance. Considering the costs of the full width street project, your request for a variance should include the following design elements in order to limit the costa and inhibit the loss of trees and vegetation on the east side of Military Road. I. Re -construct Military Road from S. 284th Street to the souther?y Star Lake Road intersection to include a 3-lane road section with 12 foot lanes. The center lane will serve as a continuous 2-way left turn lane with no landscaped islands. In this area it will enhance traffic safety, ensure the adequacy of Left -turn back- to-back storage bays and will continue full access to individual private driveways external to the site. 2. Sign and mark the 2-way left turn lane from S. 284th to the proposed northbound left turn pocket at the south intersection of Star lake Road. This 2-way left turn lane will provide access to the existing driveway on the east side between S. 284th and 282nd Streets and to Old Military Road on the west side between S. 282nd Street and Star Lake Road. 3. Install a curb, gutter, 5 foot bike lane, a 6 foot planting strip and a 6.5 foot sidewalk on the west side only between S 284th and the north site property line. 4. Leave the existing shoulder and drainage swales on the east side with all revisions or modifications marked "Future - By Others". 5. Provide street illumination on the west side. 6. P=,ide street trees in the parking strip on the west Mr. David Morris, May 9 , 1994 page 4 7. Provide signage and marked crosswalks at both access streets direG*ing hicyclists and pndRstrianR on thA east side to use the west side facilities. S. Assist city in obtaining grant funds for the immediate raconstruction of the Star Lake Road iate section. 9. Coordinate bus stop location(s) with Metro and construct one bus turn -out on the west side of IIz Zitaxy Road S. at a location approved by city and Metro staff. It is recommended this be located on the, south side of the S. 282nd Street intersection. 10. In order to show -the~ -extent of the future work, you may wish to offer to do the prelimina_s engineering design so that the limits of that ,rature Work - by Others" can be more clearly identified. Looking at Item IC, I believe that both city staff and administration would appreciate the full extant of potential road widening in the anent questions are raised by interested neighbors who may not wish tc see a major me ification on both sides c= the arterial. Considering Item 9, if the curb, gutter, bike lane and sidewalk work on the east side are deleted, then the "bus turn -out" can be treated as a fair exchange for that item. Refurbishing the existing bus shelter an the east side at this intersection may also be proposed by you although it is hard to see how this is a site related element that you alone needs to addresses. I would expect that bota items 9 and 10 will also gain the favor of existing and new residents, alike, mmny of whom may have a more than passing intarest in this protect. By the way, looking at the variance and the request to build a bike lane on only the west side, I note that they have been Proposed in accordance with the original Ring County bike facilities document that still stands as a guide. This describes Military Road past the project site as a Class 71 Bicvcle Facility. It requires a "... paved surface of adequate width on gLt 1east o-ngt Bide^. Additionally, I note Section 22-1518 cycjo Facila merely asks that they be installed per the King C2uatv General gicvcle Plan Fo a94. Given the adoption of this standard, it seems to me that there is indeed a valid requirement to provide a bike lane on one side 'Mr. David Morri.sc May 9 1994 page 5 of the road, in any case, and hence your request for a variance from providing a bike lane on both sides is most appropriate and reasonable. Thus, showing the bike lane on the east side, with its future construction noted "by others", is good way of defining this plan adoption and full future implamentation when the east side develops. To conclude this portion, then, the bike lane and paved sidewalk located on the west side alongside your plat are appropriate requirements extending for the length of your plat. Transitions back to the existing shoulder sections as discussed with Mr. Garrow are to be worked out with the further design phases. However, to implement these on the east side of Military Road is not only costly but, perhaps of greater concern, damaging to the exist.ing.environment. It will remove significant numbers of well established trees and other roadside vegetation. Next, and as a small itam, it seems that along your frontage you are constructing a three lane roadway for vehicular traffic. The section of this three lane roadway on Military Road between S. 282nd and S. 284th Streets can be marked and signed as a 2-way, left turn lane. It will be very useful for temporary detours during construction. Continuing, it should be quite clear that extending this 2-way left turn lane up to Star Lake Road certainly benefits the city. It addresses a major, current traffic safety issue. Conversely, if due to the overall costs of the full project you find that you can act economically proceed, then the city will be placed in the position of having to staL construction at that intersection wince notice has been served that this is a hazardous location with statistical certainty and, as such, they must address this issue. I believe that your construction of this element can be treated as a fair -share exchange for any work you might otherwise do on the east side of Military Road acrows from your site. To conclude, these cover the majority of my concerns. if you have any questions,- please feel free to call. Yours truly, C. V. Brown, P.E. HERITAGE WOODS FEDERAL WAY 111 SINGLE FAMILY LOTS ,r 0 In R.S. 7� Cf.6garSO r r '• / rr• . ' i ti• + .f j J �� LrLZ �/ I L ' t / ? m f�� IJo � 11� .v':�7-Y, • 1+ Jf� 17 s 'y .r , 5 i f$Y j//I e. I , �tl !! � _jJ—.r 1 ,Q V a ,: `l y 'S 1 y} ! •+ ',• TL!• ! IY ' r �~� � � III '� T n ''I � '� f�'••` / � ���' 10�'.i kk 72 { SU9UR9AN �`,J :rn,,.r1s ` I 5 �."r� ��•� r�`T' .,7�� � t '� f �` { :� S� � t � �3 �i —ems aer•• rT,� �.. pp at so i r+J:. J•r o� r � ~ it of. e � j�, �� • � 5 FOR INFORMATION CALL �7r ►► • i .�� b �� PARKLANE VENTURES L I— `I c DAVID MORRISON (206) 946-3652 sUeuRs�.v Rssroe, ; ,.:c ............ .: ... ...» :............... .. »; ��.. .....:...:... �..»........... ` ......................:...»..:. .. �......-.;.-............._..». .. »..: ..»..«..... - :..:. W£SiE� 17L 6RTY LIA4E ;..... ....... ._ y.. N• ................?............................... ........ ;.......... .............................. - - . »............. C� .......... ...... ...... . ... .... . : 1 . . . . . . . . . 1 . . . J. . . . .. _.. ... "ti ..... 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EN CAI R TRNFP:IC CSC L~ NLL Z w 5 DoT S� }> 1Pr= C.ROS'5► F.1C-x au.. �- FLAC-C�P, � 7 *"Z �IeD Role S �4"i G�TE�LtiNE =LNSH !!vU N,PROW SIGN ENO Cp,..;S rptPE:.R CZ I.v SD I SINt.1D CAN Es - - zol Gon1Es role] OTAUMINgriMM, SIC -HI, FLNGGEA, TRNE I= L wtea l L-%21-- _=Lmr**-j,. Rt_l_ c.��OL M'�ASuR�.S F"--- R, wS0OT CDs. Src� c. v �� zo! cLL 1 N�7RT� �tesr �o �►� SICK Pt 11 �N S'CRU 00 hH E:N D" w za-� B R� C 4��-AD'�� 4 1 of Z _W GILES ENGINEERING t iSSOCIATES, INC. • Atlanta, GA GEOTECHNICAL, ENVIRONMENTAL & CONSTRUCTION MATERIALS CONSULTANTS • Dallas, TX • Los Angeles, CA • Madison, WI • Milwaukee, WI Seattle, WA January 21� 1998 3ILGBVEa • • Washington, D.C. City of Federal Way FEDERAL WAY PUELIC Vi(rAK: 33530 First Way South .10MnllISl.CIIl.TF0NT DTVIS, ICN Federal Way, WA 98003-6210 Attention: Stephen Clifton, Development Services Manager Subject: Geotechnicai Engineering Review of Slope Grading Proposal Heritage Woods, Tract H and J of Division 1, Lots 52 through 58 Federal Way, Washington Project No. 6G-9707028 Dear Mr. Clifton: This letter presents the opinions and conclusions of Giles Engineering Associates, Inc. regarding geotechnical engineering considerations for development of -the referenced residential lots, as noted on plan sheets 1 and 2 of "Heritage Woods, Tract H and J, Lot Grading Plan", by Jaeger Engineering, revision date 12/9/97. These conclusions were reached based upon information developed by: 0 Review of inspection reports from temporary stabilization in Fall 1997 provided by Golder Associates, Inc.; w Review of information in Golder Associates, Inc. geotechnical engineering report dated November 17, 1997, titled "Analysis and Results of Slope Stabilization Work, Tract H and J of Division 1, Preliminary Lots 52 through 58, Heritage Woods, Federal Way, Washington"; Observation of soil conditions on site during exc.avai:ion of test pits by the preject contractor on October 15, 1997; • Engineering analysis. Authorization for these services was provided in your letter of January 8, 1998, which authorized our scope of services dated December 22, 1997, as an amendment to our Professional Services Agreement for Geotechnical Engineering Review Services, dated August 6, 1997. The purpose of these services was limited to an evaluation of earthwork and foundation construction proposed by the project developer for the referenced site, based upon the information provided to us. This letter is an instrument of service, and the conclusions presented herein have been promulgated in accordance v"6th generally accepted professional engineering practice in the field of geotechnical engineering. No other warranty is either expressed or implied. This letter has been prepared for the exclusive use of the City of Federal Way, for specific application to the stated purpose and site. 11807 North Creek Parkway South • Suite 102 • Bothell, WA 98011 425/482-2020 • Fax 425/482-6300 • E-Mail seattle@gilesengr.com GILES ENGINEERING l /SSOCIATES, INC. City of Federal Way Project No. 6G-9707028 January 21, 1998 Page 2 SITE AND PROJECT DESCRIPTION Our letter dated August 25, 1997 provides a description of the project site and conditions. Subsequent to that letter, the developer completed temporary stabilization of portions of the project site during October 1997. The Golder Associates report dated November 17, 1997 describes the temporary stabilization. The site conditions were evaluated by Golder Associates, Inc. following the slope failures, for the purpose of providing options for lot grading and construction. Golder Associates provided three geotechnical reports which •.vere supplied to us by the City for review. These reports were dated June 23, July 14, and November 17, 1997. The June 23, 1997 report includes information regarding soil and groundwater conditions, including the logs of six test pits excavated on June 15, 1997. The July 14 report contains a summary of grading alternatives for lots 52 through 58, which were based on configurations of the lots such as setbacks, slopes, and grades provided by Schneider Homes. The November 17 report includes description of temporary slope repair work, additional investigation results on Lots 53 and 54, slope stability analysis on lot 54 using recent exploration data, and recommendations for additional lot grading. The Jaeger Engineer grading plan reviewed for this study reflects the geotechnical recommendations of Golder Associates' November 17, 1997 report. Site conditions were observed by a geologist from our firm on October 15, 1997. The purpose of this reconnaissance was to evaluate soil conditions in test pits excavated in fill within the embankment side slope on lots 53 and 54. The test pits encountered a significant quantity and depth of very loose, wet to saturated fill within the embankment side slope. The fill consisted of silty sand With gravel. The fill beneath the roadway prism was found to be relatively dense, based on information in the Golder Associates' report and our observations. As a part of this review, we reviewed plan sheets_ i and 2 by Jaeger. Engineering, dated October 8, 1997, with revision dated Decendber 9, 1997 for sheet 1. The plan sheets contain general notes, a detail for interceptor trench drain construction, fill specifications, and cross -sections through lots 52 through 58 indicating existing grades and proposed final lot grades. In general, the proposed lot grades will result in fill depths of up to 20 feet on portions of the lots. The toe of fill extends up to 45 feet east of the existing property line. The toe of fill is proposed to be retained by a reinforced fill and rockery at lots 57 and 58. Fill slopes are designed for a 2H:1V (Horizontal:Vertical) inclination. Golder Associates, Inc. also reviewed the grading plan submittal, and commented on several specific aspects of the grading plan in their November 17, 1997 report. On page 5 of the referenced Golder report, Golder states that the permanent slope configurations shown on the grading plan will have a factor of safety on the order of 1.5, assuming the recommendations in the Colder report and the Jaeger Engineering grading letter are followed. GILES ENGINEERING l /SSOCIATES, INC. City of Federal Way Project No. 6G-9707028 January 21, 1998 Page 3 CONCLUSIONS The following summary describes our understanding of the critical geotechnical design and construction issues and corresponding conclusions. If other conditions exist of which we are unaware, we should be consulted for possible modification of our conclusions and recommendations. • Golder Associates has characterized the sideslope of the 25t" Place South embankment on lots 53 and 54 as wet, loose silty sand with little to some gravel, and Golder Associates concludes that the fill embankment does not apppear to be well compacted. It is our opinion that the slope failures and conditions noted by Golder Associates all indicate that there is a substantial risk that the portions of the embankment proposed for house construction on other lots in addition to lot 53 and 54, are comprised of loosely compacted fill. • Temporary stabilization of the embankment fill only involved benching and placement of quarry spall fill on lots 53 and 54, and constructing a french drain at the toe of slope. Plastic sheeting was used to cover lots 52 through 54. We are concerned with the wet condition of the embankment fill considering that drains were installed two weeks before our October 15, 1997 evaluation of embankment fill. Golder Associates recommends that the drain be augmented at lot 55. • A slope stability analysis was completed by Golder Associates on lot 54, which Golder considered the critical section of embankment fill. The slope stability analysis was only completed for temporary slope repair for winter of 1997-1998. The calculated safety factor is 1.1. Although Golder Associates concludes that the Manned D=anent slope configurations will have a factor of s fete of 1.5, calculations and supporting information were not included in the Golder Associates' November 1997 report. • Golder recommends that portions of house foundations on lots 53, 54, and 55 underlain by loose fill be supported by auger cast, or small diameter steel pipe piles. In addition, they state that remaining foundations will only have a small thickness of existing fill at depth, and will be supported on stnzctural fill to be placed later, or on native soils. In our opinion, where foundations are not supported by piles or native soils, significant risk would exist for foundation settlement if information is not provided which produces greater confidence in the supporting characteristics of the existing fill, it should be assumed that any improvements constructed over it would be subject to long -tern settlements unless supported on piles or deep foundations. GILES ENGINEERING ()SSOCIATES, INC. City of Federal Way Project No. 6G-9707028 January 21, 1998 Page 4 • The site grading alternatives presented in the Golder November 17, 1997 report indicate that permission from the city was given to fill east of the property line at lots 52 through 56. Lots 57 and 58 will have rockery walls at the property line, and reinforced fill, at the base of fill slopes. In general, extension_ of the fill limit east of the property line will improve stability of the completed fill, by increasing the buttress of the existing, questionable fill. Golder Associates has not provided specific design recommendations or stability analysis of the reinforced fill and rockery sections of the sloping fills. RECOMMENDATIONS Our recommendations are based on the available information; if additional information is provided, these recommendations may require modification. We recommend the following. 1. Lot grading in the affected area should be designed to both provide a factor of safety equal to 1.5 or more for stability of the completed fill, and to provide adequate bearing capacity and settlement performance of the completed houses. Additionally, lot grading should incorporate drainage improvements to collect and divert subsurface water and mitigate effects of this water on both the roadway and lot fills. Supplemental documentation should include the description of and .results of stability analysis for the final grading of lots 52 through 58. 2. Groundwater conditions should be established by monitoring the performance of the interceptor drain presently in place, or by other means. The stability analysis should be based on groundwater conditions established by these means. The drainage should be supplemented, if necessary. 3. The design for ict grading should include all erosion control measures, and grading criteria, typically required for wet weather construction. These criteria may be dependent on the moisture sensitivity of the fill source. 4. Specific design and stability of planned reinforced fill and rockery construction on lots 57 and 58 should be completed. 5. Design for any foundations supported over existing fill (as shown on Figure 1 of the November 17, 11997 Golder Associates report), should consist of deep foundations, footings extended through the fill to suitable native soil, or footings supported or. compacted st-tactural fir placed on suitable native soil following removal of existing fill, based on the available information. Ail of the available information indicates that the existing en Ibank_raent sideslope till presents a risk of settlement of structures built above it. GILES ENGINEERING l 1SSOCIATES, INC- City of Federal Way Project No. 6G-9707028 January 21, 1998 Page 5 We appreciate this opportunity to provide these services. Please call if you have any questions or need additional information. We are available to review additional submitals received on these matters, or to meet with City staff to discuss these matters at your request. Respectfully submitted, GILES ENGINEERING ASSOCIATES, INC. 3 Chris J. Be ens _ Engineering Geologist r John E. Zipper, P.E. Regional Manager cc: Mr. Jim Harris Senior Planner City of Federal Way �t b- P "= EXPIREC' 1124 IT � C 0 0 U y- FILED FOR RECORD AT REQUEST OF: Parklane Ventures, Inc. MAIL TO: CITY OF FEDERAL WAY 33530 1 ST WAY SOUTH FEDERAL WAY, WA 98003 ATTN: Stephen Clifton EXHIBIT C �� �1 11(- 0 LICENSE The undersigned owner of certain real property located in Federal Way, Washington and legally described as follows: TAX PARCEL NOS: 332204-9026, 332204-9183, 332204-9042, 332204-9016, 332204-9006 That portion of the northwest quarter of the southeast quarter of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington: Full legal description attached hereto as Exhibit "'I" and incorporated herein by this reference ("Property") hereby grants an irrevocable license to the City of Federal Way ("City') and the City's agents, employees, contractors or representatives to enter upon the Property to inspect the construction of improvements, the performance of work or to allow the City to perform any necessary maintenance or work, all pursuant to that certain Agreement and Maintenance Bond of even date entered into between the City and the undersigned and incorporated herein by this reference. DATED this Z1 [Corporate Notary] day of f . 19 y� Parklane Ventures, Inc. UIIL�' (Signature) STATE OF WASHINGTON 1 ) ss. �10VIO Al. O-/ COUNTY OF KING ) Y e'ohis day personally appeared before me to me known to be a the r ,-� r«r.-� x-� of !F�' ,the corporation g that executed the foregoing License, and acknowledged the saidinstrumentto be the free and voluntary 0 act and deed of said corporation, for the uses and purposes therein mentioned, and on oath stated that he/she was authorized to execute said instrument and that the seal affixed, if any, is the corporate seal of said corporation. GIVEN my hand and official seal this 2( y of A�-/Wr .1991. J. AV ��T► R (typed/printed name of note ) S _.. k Notary Public in and for th State of f1 hington. •,� PUBL1G ! My commission expires -7 .,� 1� .12 g0__� 'L C +f lot [individual Notary] STATE OF WASHINGTON } } ss. COUNTY OF KING j On this day personally appeared before me, to me known to be the individual(s) described in and who executed the foregoing License, and on oath swore that he/she/they executed the foregoing instrument as his/her/their free and voluntary act and deed for the uses and purposes therein mentioned. GIVEN my hand and official seal this day of , 19 (notary signature) (typed/printed name of notary) Notary Public in and for the State of Washington. My commission expires FILED FOR RECORD AT REQUEST OF: Parklane Ventures, Inc. MAIL TO: CITY OF FEDERAL WAY 33530 1 ST WAY SOUTH FEDERAL WAY, WA 98003 ATTN: Stephen Clifton EXHIBIT D LICENSE coply The undersigned owner of certain real property located in Federal Way, Washington and legally described as follows: TAX PARCEL NOS: 332204-9026, 332204-9183, 332204-9042, 332204-9016, 332204-9006 That portion of the northwest quarter of the southeast quarter of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington: Full legal description attached hereto as Exhibit'1" and incorporated herein by this reference. ("Property") hereby grants an irrevocable license to the City of Federal Way ("City") and the City's agents, employees, contractors or representatives to enter upon the Property to inspect the construction of improvements, the performance of work or to allow the City to perform any necessary maintenance or work, all pursuant to that certain Agreement and Performance/Maintenance Bond of even date entered into between the City and the undersigned and incorporated herein by this reference. DATED this Z/ day of %'/0• 1997 Parklane Ventures, Inc. 94k.-X-� (Signature) /a - / t , //o0w [Corporate Notary] STATE OF WASHINGTON ) ) ss. COUNTY OF KING ) On this day personally appeared before me �✓/� W 1AWe1,f�/ , to me known to be the ALA' /,X0-�J9W<- of , the corporation that executed the foregoing License, and acknowledged the said instrument to be the free and voluntary act and deed of said corporation, for the uses and purposes therein mentioned, and on oath stated that he/she was authorized to execute said instrument and that the seal affixed, if any, is the corporate seal of said corporation. GIVEN my hand and official seal this day of r��o 0W-r , 19 (n-DWY signature) (typed/printed name of notary) Notary Public in and for the State of Washington. My commission expires mil'—.�� 7 [Individual Notary] STATE OF WASHINGTON ) ) ss. COUNTY OF KING On this day personally appeared before me, to me known to be the individual(s) described in and who executed the foregoing License, and on oath swore that he/she/they executed the foregoing instrument as his/her/their free and voluntary act and deed for the uses and purposes therein mentioned. GIVEN my hand and official seal this day of , 19 (notary signature) (typed/printed name of notary) Notary Public in and for the State of Washington. My commission expires KAdceunMntUwdtpm.pen2 01-28-97 Mew) FILED FOR RECORD AT REQUEST OF: PARKLANE VENTURES INC. MAIL TO: CITY OF FEDERAL WAY 33530 1ST WAY SOUTH FEDERAL WAY, WA 98003 ATTN: Stephen Clifton EXHIBIT C LICENSE (C(DIPY The undersigned owner of certain real property located in Federal Way, Washington and legally described as follows: TAX PARCEL NO: 332204-9026, 332204-9183, 332204-9042, 3322049016, 332204-9006 That portion of the northwest quarter of the southwest quarter of the southeast quarter of Section 33, Township 22 North, Range 4 East, W.M, in King County, Washington: Full legal description attached hereto as Exhibit `1 " and incorporated herein by this reference. ("Property") hereby grants an irrevocable license to the City of Federal Way ("City") and the City's agents, employees, contractors or representatives to enter upon the Property to inspect the construction of improvements, the performance of work or to allow the City to perform any necessary maintenance or work, all pursuant to that certain Agreement and Contingency, Monitoring and Maintenance Bond of even date entered into between the City and the undersigned and incorporated herein by this reference. DATED this ?/ day of 19 g7 PARKLANE VENTURES, INC. (Signature) M1 6 9v, /%?G2. [Corporate Notary] STATE OF WASHINGTON } } ss. COUNTY OF KING I On this day personally appeared before me 14wVll% Gr/, .4ogCellae-i , to me known to be the 6Pgf ,0W— eW1A 9Cvr...[ of the corporation that executed the foregoing License, and acknowledged the said instrument to be the free and voluntary act and deed of said corporation, for the uses and purposes therein mentioned, and on oath stated that he/she was authorized to execute said instrument and that the seal affixed, if any, is the corporate seal of said corporation. GIVEN my hand and official seal this sa/a1-day of��-i �- fg7 I (notely signature) (typed/printed name of notary) Notary Public in and for the State of Washington. My commission expires 0 z a 6 94 000 LW cd 3 r-4 � s✓ W O on. `0 41 G W � � omo -rd U t (} E 4 cd 'a (33 y � h �03 L. O c � L vVi bOD a�3 bo 0 mUL-0 a .9-- C a -cs m A �___________---_� I � I im I� I IZ I I E L_______________I m �o d m y S 0 P. W G v > 0 Q > amLL) a O U W >. o�m LL, 00 CO N Z mm -a Z) m e r� I GO'Oi a31 £00 MOM h1Nf10a 9NIA Nd 00:00:60 0020-90EOM EXHIBIT A Legal Description ,Tract A, Heritage Woods That portion of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington, more particularly described as follows: Commencing at the center of said Section 33 said point being a concrete monument with Brass Cap and Bears N 01 003'43" E, a distance of 2632.77 feet from the South Quarter corner (Monument in Case) of said Section 33; thence North 88023'27" West along the North line of the Northeast Quarter of the Southwest Quarter of said Section 33, a distance of 411.28 to the Northeast corner of the Plat of Laurelwood North No.4 as recorded in Volume 87 of Plats, Page 8, records of King County, Washington; thence South 01 003'43" West along the East line of said Laurelwood North No. 4, a distance of 571.94 feet; thence South 88056'17" East, a distance of 158.76 feet to the True Point of Beginning; thence continuing South 88056'17" East, a distance of 110.00 feet; thence South 75043'52" East, a distance of 101.26 feet; thence North 22043'16" East, a distance of 110.00 feet to the beginning of a curve to the Left, radial to said line, having a radius of 50.00 feet and a central angle of 26005'28"; thence along said curve an arc distance of 22.77 feet; thence South 03022'12" East radial to said curve, a distance of 115.00 feet; thence North 72035'58" East, a distance of 104.94 feet; thence North 37049'56" East, a distance of 156.77 feet; thence North 28034'07" East, a distance of 82.65 feet; thence North 01 036'33" East, a distance of 217.21 feet to a point on a curve to the Right from which the radius point bears South 03026'35" West, having a radius of 250.00 feet and a central angle of 26004'15"; thence along said curve, an arc distance of 113.76 feet; thence South 29030'49" West radial to said curve, a distance of 110.00 feet; thence South 50043'32" East, a distance of 50.00 feet; thence South 28010'38" East, a distance of 55.00 feet; thence South 17019'43" East, a distance of 65.50 feet; thence South 16056'07" East, a distance of 65.47 feet; thence South 05033'07" East, a distance of 60.00 feet; thence South 13042'53" West, a distance of 50.00 feet; thence South 70013'06" East, a distance of 110.00 feet to the beginning of a curve to the Right, radial to said line, having a radius of 300.00 feet and a central angle of 15035'38"; thence along said curve an arc distance of 81.65 feet, thence South 35°22'32" West tangent to. giid curve, a distance of 62.00 feet; thence North 54°37'28" West, a distance of 145.00 feet; thence North 73011'00" West; a distance of 124.54 feet; thence South 72°09'04" West, a distance of 133.84 feet; thence South 72009'04" West, a distance of 60.00 feet; thence North 89036'02" West, a distance of 69.23 feet; thence South 17°31'41" East, a distance of 110.02 feet to the beginning of a curve to the Left, radial to said line, having a radius of 50.00 feet and a central angle of 57024'46"; thence along said curve an arc distance of 50.10 feet; thence North 74056'27" West radial to said curve, a distance of 109.74 feet; thence North 88056'17" West, a distance of 110.00 feet; thence North 01 003'43" East, a distance of 248.49 feet to the True Point of Beginning. Containing 4.10 Acres, more or less. 0 z a V Z H cn W a W z d x 14 d Pq C4 Q trl H E. T 3 p O *W60 v -vi r� •� aG 44U3a O CS T3 � jj4u -A O d ,, w � 41 3 � b •'� � a, cil s7 o a� o 00 ca n.3 3 B O o d S -S ca r--------------- E y �z E i L----------------1 Cf a r N Q cu if J Q9 4 w 00'TT 831 *09 MOM AINMO 9MIA 0 00:69:80 96T0-9000L6 EXHIBIT A Legal Description, Roads, Hertage Woods That portion of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington, more particularly described as follows: Commencing at the center of said section 33, said point being a concrete monument with Brass cap and Bears North 01 003'43" East, a distance of 2632.77 feet from the South Quarter corner (Monument in Case) of said Section 33; thence South 88023'41" East along the North line of the Southeast Quarter of said Section 33, a distance of 1183.23 feet to the Westerly margin of New Military Road; thence South 35022'32" West along said Westerly margin, being 50.00 feet at right angles thereto the centerline of said New Military Road South, a distance of 716.35 feet to the True Point of Beginning and the beginning of a curve to the Right tangent to said line having a radius of 25.00 feet and a central angle of 79003'13"; thence an arc distance of 34.49 feet along said curve to a point of reverse curve to the Left from which the radius point bears South 24025'45" West, having a radius of 778.39 feet and a central angle of 10"43'55"; thence an arc distance of 145.80 feet along said curve to a point of reverse curve to the Right from which the radius point bears North 13041'51" East, having a radius of 25.00 feet and a central angle of 78028'43'; thence an arc distance of 34.24 feet along said curve to a point of reverse curve to the Left from which the radius point bears North 87049'26" West, having a radius of 350.00 feet and a central angle of 19030'17"; thence an arc distance of 119.15 feet along said curve ; thence North 17019'43" West tangent to said curve, a distance of 117.91 feet to the beginning of a curve to the Left tangent to said line having a radius of 300.00 feet and a central angle of 27031'28"; thence an arc distance of 144.12 feet along said curve to a point of reverse curve to the Right from which the radius point bears North 45008'48" East, having a radius of 25.00 feet and a central angle of 70000'31 "; thence an arc distance of 30.55 feet along said curve to a point of reverse curve to the Left from which the radius point bears North 64050'41" West, having a radius of 200.00 feet and a central angle of 59018'39"; thence an arc distance of 207.03 feet along said curve ; thence North 34009'20" West tangent to said curve, a distance of 238.74 feet; thence South 53034'04" West, a distance of 50.04 feet; thence CIF- �N. DRr a°' � • � fCISTER�t�'� 4,e SjO S� d �n�a� L LANDZ South 34009'20" East, a distance of 236.76 feet to the beginning of a curve to the Right tangent to said line having a radius of 150.00 feet and a central angle of 50021'47"; thence an arc distance of 131.85 feet along said curve to a point of compound curvature having a radius of 25.00 and a central angle of 100*38'19"; thence an arc distance of 43.91 feet to a point of reverse curve to the Left from which the radius point bears South 26050'46" West, having a radius of 300.00 feet and a central angle of 25014'13"; thence an arc distance of 132.14 feet along said curve ; thence, North 88023'27" West tangent to said curve, a distance of 52.81 feet to the beginning of a curve to the Right tangent to said line having a radius of 25.00 feet and a central angle of 81 °33'58"; thence an arc distance of 35.59 feet along said curve to a point of reverse curve to the Left from which the radius point bears South 83010'31" West, having a radius of 50.00 feet and a central angle of 163°07'57"; thence an arc distance of 142.36 feet along said curve to a point of reverse curve to the Right from which the radius point bears North 79057'25" West, having a radius of 25.00 feet and a central angle of 81 °33'58"; thence an arc distance of 35.59 feet along said curve; thence North 88023'27" West tangent to said curve, a distance of 52.44 feet to the beginning of a curve to the Left tangent to said line having a radius of 300.00 feet and a central angle of 33056'58"; thence an arc distance of 177.76 feet along said curve to a point of reverse curve to the Right from which the radius point bears North 32020'25" West, having a radius of 25.00 feet and a central angle of 104048'15"; thence an arc distance of 45.73 feet along said curve to a point of reverse curve to the Left from which the radius point bears South 72°27'50" West, having a radius of 50.00 feet and a central angle of 233024'11"; thence an arc distance of 203.69 feet to a point of reverse curve to the Right from which the radius point bears South 19003'39" West, having a radius of 25.00 feet and a central angle of 10404815"; thence an arc distance of 45.73 feet along said curve to a point of reverse curve to the Left from which the radius point bears South 56°08'06" East, having a radius of 300.00 feet and a central angle of 25028'30"; thence an arc distance of 133.39 feet along said curve to a point on the curve; thence North 86039'24" East, a distance of 51.29 feet to the beginning of a curve to the Right from which the radius point bears South 79013'08" East, having a radius of 250.00 feet and a central angle of 80049'41 "; thence along said curve, an arc distance of 352.68 feet; thence South 88023'27" East tangent to said curve, a distanc�€��,3 feet to the i beginning of a curve to the Right tangent to said line having a radius of 25.00 feet and a central angle of 90000'00"; thence an arc distance of 39.27 feet along said curve ; thence South 01 036'33" West tangent to said curve, a distance of 124.75 feet to the beginning of a curve to the Right tangent to said line having a radius of 125.00 feet and a central angle of 43046'04"; thence an arc -distance of 95.49 feet along said curve to a point of compound curvature having a radius of 25.00 and a central angle of 70031'44"; thence an arc distance of 30.77 feet to a point of reverse curve to the Left from which the radius point bears South 25054'21" West, having a radius of 50.00 feet and a central angle of 250031'43"; thence an arc distance of 218.63 feet; thence North 45022'37" East tangent to said curve, a distance of 70.71 feet to the beginning of a curve to the Left tangent to said line having a radius of 175.00 feet and a central angle of 43046'04'; thence an arc distance of 133.68 feet along said curve; thence North 01 036'33" East tangent to said curve, a distance of 124.75 feet to the beginning of a curve to the Right tangent to said line having a radius of 25.00 feet and a central angle of 90000'00'; thence an arc distance of 39.27 feet along said curve; thence South 88023'27" East tangent to said curve, a distance of 77.00 feet to the beginning of a curve to the Right tangent to said line having a radius of 250.00 feet and a central angle of 71 °03'44"; thence an arc distance of 310.07 feet along said curve ; thence South 17019'43" East tangent to said curve, a distance of 117.91 feet to the beginning of a curve to the Right tangent to said line having a radius of 300.00 feet and a central angle of 42034'58'; thence an arc distance of 222.96 feet along said curve; thence South 64044'45" East radial to said curve, a distance of 50.00 feet to the beginning of a curve to the Left, radial to said line, having a radius of 350.00 feet and a central angle of 6010'56"; thence along said curve an arc distance of 37.76 feet to a point of reverse curve to the Right from which the radius point bears South 70055'41" East, having a radius of 25.00 feet and a central angle of 85006'49"; thence an arc distance of 37.14 feet along said curve to a point of compound curvature having a radius of 718.39 and a central angle of 8028'49'; thence an arc distance of 106.33 feet to a point of compound curvature having a radius of 25.00 and a central angle of 102042'35"; thence an arc distance of 44.82 feet to a point on the curve; thence North 35022'32" East, a distance of 112.37 feet to the True Point of Beginning. 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N O O 4 p; a w w 0 } p Q ca a cC O 42o 0 0 O ^ .= a i.r O O b .0 -O w � O y U 7 O 03 �ca o a z O o W i~ CIO "y O : o w N ca co � p W 00 ,V,• Q 3 � A ca ro O C ^ �' `' c U U4:� �pO rn V7 co O C) d c � T � �3 > U ro Pa o ca N o L a m Ob w E c6 EXHIBIT A Legal Description ,Tract A, Heritage Woods That portion of Section 33, Township 22 North, Range 4 East, W.M in King County, Washington, more particularly described as follows: Commencing at the center of said Section 33 said point being a concrete monument with Brass Cap and Bears N 01 003'43" E, a distance of 2632.77 feet from the South Quarter corner (Monument in Case) of said Section 33; thence North 88023'27" West along the North line of the Northeast Quarter of the Southwest Quarter of said Section 33, a distance of 411.28 to the Northeast corner of the Plat of Laurelwood North No.4 as recorded in Volume 87 of Plats, Page 8, records of King County, Washington; thence South 01 003'43" West along the East line of said Laurelwood North No. 4, a distance of 571.94 feet; thence South 88056'17" East, a distance of 158.76 feet to the True Point of Beginning; thence continuing South 88056'17" East, a distance of 110.00 feet; thence South 75°43'52" East, a distance of 101.26 feet;. thence North 22043'16" East, a distance of 110.00 feet to the beginning of a curve to the Left, radial to said line, having a radius of 50.00 feet and a central angle of 26005'28'; thence along said curve an arc distance of 22.77 feet; thence South 03022'12" East radial to said curve, a distance of 115.00 feet; thence North 72035'58" East, a distance of 104.94 feet; thence North 37049'56" East, a distance of 156.77 feet; thence North 28034'07" East, a distance of 82.65 feet; thence North 01 036'33" East, a distance of 217.21 feet to a point on a curve to the Right from which the radius point bears South 03026'35" West, having a radius of 250.00 feet and a central angle of 26004'15"; thence along said curve, an are distance of 113.76 feet; thence South 29030'49" West radial to said curve, a distance of 110.00 feet; thence South 50043'32" East, a distance of 50.00 feet; thence South 28010'38" East, a distance of 55.00 feet; thence South 17019'43" East, a distance of 65.50 feet; thence South 16056'07" East, a distance of 65.47 feet; thence South 05033'07" East, a distance of 60.00 feet; thence South 13042'53" West, a distance of 50.00 feet; thence South 70013'06" East, a distance of 110.00 feet to the beginning of a curve to the Right, radial to said line, having a radius of 300.00 feet and a central angle of 15035'38"; thence along said curve an arc distance of 81.65 feet; thence South 35022'32" West tangent to curve, a w distance of 62.00 feet; thence North 54037'28" West, a distance of 145.00 feet; thence North 73011'00" West, a distance of 124.54 feet; thence South 72009'04" West, a distance of 133.84 feet; thence South 72°09'04" West, a distance of 60.00 feet; thence North 89036'02" West, a distance of 69.23 feet; thence South 17031,411, East, a distance of 110.02 feet to the beginning of a curve to the Left, radial to said line, having a radius of 50.00 feet and a central angle of 57024'46'; thence -along said curve an arc distance of 50.10 feet; thence North 74056'27" West radial to said curve, a distance of 109.74 feet; thence North 88056'17" West, a distance of 110.00 feet; thence North 01 003'43" East, a distance of 248.49 feet to the True Point of Beginning. Containing 4.10 Acres, more or less. 0 z 0 L.. 3 r4 cd � G '0 wr. x u-t 4 a. 0coo cd -ri_ � U U 0 v 0 N of 4 H -r4 d 5 u C b 'd 0 C a33 a. !4 b O o • y t6 F � R 2 r------------- I L--------------- I d mm .. y .'"~.. a1 � w � � y W ai 'B G o � � C 0 G � o 0 Is � 91 s u cc > U. c�¢> �mL >,=a00 U LU>gm 10 m �u � m Z N Z mm D m M, 0D'0T M COD MR A1NflD0 SHIN W 00:00:60 00Z0-906016 EXHIBIT A Legal Description ,Tract A, Heritage Woods That portion of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington, more particularly described as follows: Commencing at the center of said Section 33 said point being a concrete monument with Brass Cap and Bears N 01 003'43" E, a distance of 2632.77 feet from the South Quarter corner (Monument in Case) of said Section 33; thence North 88023'27" West along the North line of the Northeast Quarter of the Southwest Quarter of said Section 33, a distance of 411.28 to the Northeast corner of the Plat of Laurelwood North No.4 as recorded in Volume 87 of Plats, Page 8, records of King County, Washington; thence South 01 003'43" West along the East line of said Laurelwood North No. 4, a distance of 571.94 feet; thence South 88056'17" East, a distance of 158.76 feet to the True Point of Beginning; thence continuing South 88056'17" East, a distance of 110.00 feet; thence South 75"43'52" East, a distance of 101.26 feet; thence North 22043'16" East, a distance of 110.00 feet to the beginning of a curve to the Left, radial to said. line, having a radius of 50.00 feet and a central angle of 26005'28'; thence along said curve an arc distance of 22.77 feet; thence South 03022'12" East radial to said curve, a distance of 115.00 feet; thence North 72035'58" East, a distance of 104.94 feet; thence North 37049'56" East, a distance of 156.77 feet; thence North 28034'07" East, a distance of 82.65 feet; thence North 01 036'33" East, a distance of 217.21 feet to a point on a curve to the Right from which the radius point bears South 03026'35" West, having a radius of 250.00 feet and a central angle of 26004'15'; thence along said curve, an arc distance of 113.76 feet; thence South 29°30'49" West radial to said curve, a distance of 110.00 feet; thence South 50043'32" East, a distance of 50.00 feet; thence South 28010'38" East, a distance of 55.00 feet; thence South 17019'43" East, a distance of 65.50 feet; thence South 16056'07" East, a distance of 65.47 feet; thence South 05033'07" East, a distance of 60.00 feet; thence South 13042'53" West, a distance of 50.00 feet; thence South 70013'06" East, a distance of 110.00 feet to the beginning of a curve to the Right, radial to said line, having a radius of 300.00 feet and a central angle of 15035'38"; thence along said curve an arc distance of 81.65 feet; thence South 35022'32" West tangent to said curve, a distance of 62.00 feet; thence North 54037'28" West, a distance of 145.00 feet; thence North 73011'00" West, a distance of 124.54 feet; thence South 72009'04" West, a distance of 133.84 feet; thence South 72009'04" West, a distance of 60.00 feet; thence North 89036'02" West, a distance of 69.23 feet; thence South 17031'41" East, a distance of 110.02 feet to the beginning of a curve to the Left, radial to said line, having a radius of 50.00 feet and a central angle of 57024'46'; thence along said curve an arc distance of 50.10 feet; thence North 74056'27" West radial to said curve, a distance of 109.74 feet; thence North 88056'17" West, a distance of 110.00 feet; thence North 01 003'43" East, a distance of 248.49 feet to the True Point of Beginning. Containing 4.10 Acres, more or less. _ csss �• .� ti .r.s unrs Arid mimncea mentinnnd-fn this Instrument. EtING COUNTY RECORDS SURVEYS ANlTa ELECTIONS P s LATSs CONDOS RECEIPT =T0" RECEIPT #: u3106I97 54 CASHIER:TED Recording Ham` Time TYPe Trx Amount g -M 09:02:27 ND SPC 9.00 Total Receipt Charges: ----- 9.00 Payments: Type Check or Account Name CHECK PACE Total of Payments Amount 9.00 9.00 .. -----^--------��----- �- �. , -- --- ; i--•---:i�.� a�;.` f �....... _ .�_ -. - . i,_. .iZ�aisDl3 iri ��8qz fi�u2 5:1 frf 7124� <11 .::z:•;tr; :, ,�, irti t�>i.,�. .- .. _.. -- i. :d flc�h :a!'?A `' �$ '.^•i, c i Ifi !,r KING COUNTY RECORDS A CpASHI R FGELECTIONS CUSTWR RECEIPT t: 03/06/97 38 08/06/1997 08-.51:44 E1531350 F01 PROCES 2.00 2.00 CASH Total of Payments 2.00 C 3 o. ti N al w o W Np =a O U A E 5 ow a L 0 �o vo� a w yry y O w�ya W UaU[A 0 �—Uw �w PQ �i mu w�.• o W H W Q P2 bo U � •� O �z as W qA °w z� E F Fz 4o M O Cl (XI r; �G c cL� } Lr) i cl) U M a N z u a�ang M 40 0 G y y fr �i y ro ti C c Q) rd O Gsa fi lA W :d a� E CO z rA U HOJLNvxf) SHIIHS � yy�7 4� _ Q O fI 6x L. a U z w ] z ❑ W � z a M �. Q ❑2 04 c F 0 u F LQ T V) W t V. a W X r� r.. �. Q. .. F r-i rlu ✓�. O 'O y fi 2 a o tL �[ r, ,� z z ;-{ O ti G u a o A O LU vY G. IMF N w o .¢ •n L ®E z v) U R ti L a=i 'C L v r; LL' d ,N, O C C +cccs L a u U. t i L ' La Q , n O C.1 0. Cd '•-' rl :-1 j 1 C w y u u cj E E o e u 7 p O � u `o A C- is G• Si) 64 (f? 604 6R Vf ff3 6f) I.S Q a ^ ate+ ;; C; a0+ U aLoa`� �cc �cn L c O v C �a,F S w a A Q °z 0 El El ❑ o � 'c7 c E3 3 3 c I ao�o w ❑❑❑ ❑❑ a r 00 I U ca 0. 111 acu oU �U �"' I s O •D � 3 7 C V ti cn z o� + T 'O U� o f 3 oo cl cy C C 7 C ca 14 '_' a ° T cCi U o Dv -a C C U U ` o o o ° p ~ Q o c,, a U E ' chi0 El n< O .d oo w oo�. a L o •� w N U on n.N C '> T L F 3 U 4 U @0. m U L _n. -- o❑❑ _❑❑ a a` r � O T, <CG P� •�•..0 i ' -•r-i LrI rW O •C�7 •,1 M be DVO O `^•' = U ca 4. Ob a^+ CUj O O w. O a w' c� cc E V 6�i � S 0 d4 i�r iz U. z ca A O.Q L &OP Ca z ca Q U ,i,' N .— 3 U y ii C cn 4 O" 1] w y =1 O O •�7�_ 000 0 Cp a p cl, cJ cC cNS 'O U •O b0� C U .0 ,E 'O p N O 0=° 3 y tl E = ccn l) O O O ` •a C 4 �. C O b C 3 ° E_ U o oo U y - 0o L.� C c" •d °2-50- cy •O i C T Uc� ti ! U U U 0 � u" .� ° on ❑ - o z 75 0 N ro Ca ¢ _ U on T N U E 0 p N L C •y G C cism C u U U zm o E Urm-° 0 N o� ro U ca 4: C U is uT •y <w. •3 U U 3 3 u u C c N a U 00 � u cn ° -n .E ❑ E 3— C o x co 0 m z w TJ O C N O C "UO N N c., cCa O .O V "..' O 2p � U ..0 ® o - o0 o cl) 0 0. F 0 Q Q�b a L O h W v C6 u+ �a , iy F N O C N r , Q •� .0 u W=9a z Ca W .0 o -r. A C7 z va.. Q moo$ w o U mv om C; `0 o'u °� 3 O ❑ w W •H � 0 c �+ o G ee C O = o d EXHIBIT A Legal Description ,Tract B, Heritage Woods That portion of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington, more particularly described as follows: Commencing at the center of said Section 33 said point being a concrete monument with Brass Cap and Bears N 01 °03'43" E, a distance of 2632.77 feet from the South Quarter corner (Monument in Case) of said Section 33; thence North 88°23'27" West along the North line of the Northeast Quarter of the Southwest Quarter of said Section 33, a distance of 401.28 to the True Point of Beginning; thence continuing North 88023'27" West along said North line a distance of 10.00 feet to the Northeast corner of the Plat of Laurelwood North No.4 as recorded in Volume 87 of Plats, Page 8, records of King County, Washington; thence South 01 003'43" West along the East line of said Laurelwood North No. 4, a distance of 86.58 feet; thence South 63039'58" East, a distance of 125.56 feet to the beginning of a curve to the Right, radial to said line, having a radius of 50.00 feet and a central angle of 11 032'13'; thence along said curve an arc distance of 10.07 feet to a point on the curve; thence North 63039'58" West, a distance of 120.23 feet; thence North 01 003'43" East a distance of 80.24 feet to the North line of the Northeast Quarter of the Southwest Quarter of said Section 33 and the True Point of Beginning. Containing 0.05 Acres, more or less. 0 z 6 O .-+ �C% Cd-.4 ?+ U N _rd O 4i U c 3 pa CO 10 m 44 c H O O Gd ?. 3 � w co O U .� Ea a1• N .IJ W rl E•'� �.^a � • CO 0 O Q, a � �" R u o �-4 o A�I o Ti , 11 y QD U � q C Q z l: U 'C O S E �a o}, o, fsa R to U w :> o .a o A m m A w i !w I In •I f� ! ! I F � 1 I L---_--_----___-� 00'6 U 0 c°¢U > -'=)¢ w a O U J a: J >. Lu O M Z m N Z m� m z b 9 R 931 200 S4800H AlNr13 gNIN Nb 00:20.60 *020-40£016 N 0 0 0 In [+i m In W EXHIBIT A Legal Description ,Tract B, Heritage Woods That portion of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington, more particularly described as follows: Commencing at the center of said Section 33 said point being a concrete monument with Brass Cap and Bears N 01003143" E, a distance of 2632.77 feet from the South Quarter corner (Monument in Case) of said Section 33; thence North 88023'27" West along the North line of the Northeast Quarter of the Southwest Quarter of said Section 33, a distance of 401.28 to the True Point of Beginning; thence continuing North 88023'27" West along said North line a distance of 10.00 feet to the Northeast corner of the Plat of Laurelwood North No.4 as recorded in Volume 87 of Plats, Page 8, records of King County, Washington; thence South 01 003'43" West along the East line of said Laurelwood North No. 4, a distance of 86.58 feet; thence South 63039'58" East, a distance of 125.56 feet to the beginning of a curve to the Right, radial to said line, having a radius, of 50.00 feet and a central angle of 11032'13'; thence along said curve an arc distance of 10.07 feet to a point on the curve; thence North 63039'58" West, a distance of 120.23 feet; thence North 01 003'43" East a distance of 80.24 feet to the North line of the Northeast Quarter of the Southwest Quarter of said Section 33 and the True Point of Beginning. Containing 0.05 Acres, more or less. to be the free and voluntary act of such party for the uses F es mentione�tl�l nstrument. d u a• 4 CC• Q F Q no a x 0 U z z I 41. L. +0+ L c a 4 r• y ti. C ) i.. a U '�o ;, 4siF� GF). 609, 60-�, 609. GMI V--�QS C C`, 3 � C_ 7 i] C G N L Q c7 6 t" o rr y ao I: p v ..O � ci O G1•I F ,x 61 ci i q O q W v a+ z e A ul 3 G C w ca ca a Z ❑ ❑ C U b C. 4 W ❑ ❑ ❑ El3 C �❑> C C � I ro 1;3 3 3 c U :o � v ro Ca aNi O U .-O `_° c o o [ N o� U Ca U C 64 I •C O w 7 N� roU C c6 Cc. �o X m O C a -0 'LJ o ea ti [ r3 U a is •ty y U o > o 4 Q m v� a asp. >. 'b M U C� U U N U ❑❑ t: o o c W aU A> a' o -o oo 'b U w b N bnh 4 s O a won '> L R X 04 U 4 cCC C. •.C.• ca �• 40 a❑❑ �❑p �►1 C. (45 41 �s ^� ci 4) it -4 cd C DO w C q p p o m o r cva. M cr . M ti oo V DC b C p E! 3 C •C1 "-n U Qi '�y C7 '� SY-. GC7 •b N Vl 'U v� C O C ..b C rC c0 0 3 E M Q O L) r4 U 3 _� ❑ o U a n c7 3 30 w y�[3y°oc"s=� !t-- C 0 C w ci3 ¢ co" Q O C C H 0 C C U •� r�.'C p U C� b z c! O jw c� 7 r a v O 7 rL ❑ U O b ,�N' y ` 4 U G 78,11 C C 3❑� U id � W U O� C U o c 3 N� N c> Gv.= y ❑ F 3 V C a 9 p F•' C U C M 'L7 c... '17 V = N] an Fes-. t; wcc a ee]]o cd w Q w w, ❑ W •� [.�n�i• u C,116 A U •¢u] � C � � I�-1 ►7 •�.p R �w C%J N � i4 w u o' o-� U ❑ C3,7 � tV c O C G U I,— ar w w F t3 C] , EXHIBIT A Legal Description, A Portion of Parcel D, Heritage Woods, to be dedicated as i road. That portion of the Southwest Quarter of the Northeast Quarter of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington, described as follows: Beginning at the Southeast corner of said subdivision, thence N88023'41 "W along south line thereof 180.29 feet to the westerly margin of New Military Road and the True Point of Beginning; thence continuing N88023'41 "W a distance of 24.05 feet; thence N35122'32"E a distance of 246.13 feet to the East line of said subdivision, thence S01010'12"W along east line of said subdivision a distance of 35.57 feet to the westerly margin of New Military Road; thence S35022'32"W along said westerly margin of New Military Road, a distance of 203.34 feet to the True Point of Beginning, containing 0.1 acres more or less. Together with portion. described as follows: Beginning at the Southeast corner of said subdivision, thence N88023'41 "W along south line thereof a distance of 42.13 feet to the Easterly margin of New Military Road; thence N35022'32"E along said margin, a distance of 74.94 feet to the East line of said subdivision; thence S01010'12"W along east line of said subdivision 62.30 feet to the Point of Beginning, containing 0.03 acres more or less. IN. 'R)- v �rSiE,.• S4 L LA�� i' 0 4-1 ca fw+, W 'U 0 U rl .a td Cd _ >a m H O b w > b O aca 'm z0 W r-+ to Q. •r1 U .r{ Cu G ' a. 3 � o0 a. 0 to JO W U /-A� o V w` W ^^11 W (4.) G a.� o Ca A ti "� a cad ° _ = o 0 03 A y 7t Ck G L N ci r u Q L- - - - - - - - - - - - - --� m O U o � v d C) y � u s ^ d � r v w L 7r a`"i m 1 r 1• E z �,t 00IG Q31 M M0334 AMD INN NV 00:£0:60 ZRD-90EOL EXHIBIT A Legal Description, A Portion of Parcel D, Heritage Woods, to be dedicated as road. That portion of the Southwest Quarter of the Northeast Quarter of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington, described as follows: Beginning at the Southeast corner of said subdivision, thence N88023'41 "W along south line thereof 180.29 feet to the westerly margin of New Military Road and the True Point of Beginning; thence continuing N88023'41 "W a distance of 24.05 feet; thence N35022'32"E a distance of 246.13 feet to the East line of said subdivision, thence S01010'12"W along east line of said subdivision a distance of 35.57 feet to the westerly margin of New Military Road; thence S35022'32"W along said westerly margin of New Military Road, a distance of 203.34 feet to the True Point of Beginning, containing 0.1 acres more or less. Together with portion described as follows: Beginning at the Southeast corner of said subdivision, thence N88023'41 "W along south line thereof a distance of 42.13 feet to the Easterly margin of New Military Road; thence N35022'32"E along said margin, a distance of 74.94 feet to the East line of said subdivision; thence S01010'12"W along east line of said subdivision 62.30 feet to the Point of Beginning, containing 0.03 acres more or less. . ,"0.4 0 0 a W O 0 0 IN 0 W it- Qr- 4 0 0 Z9 of a CU O O 8 ti Q1 FILED FOR RECORD AT REQUEST OF: PARKLANE VENTURES INC. MAIL TO: CITY OF FEDERAL WAY 33530 1ST WAY SOUTH FEDERAL WAY, WA 98003 ATTN: Stephen Clifton EXHIBIT LICENSE (C(Olpy The undersigned owner of certain real property located in Federal Way, Washington and legally described as follows: TAX PARCEL NO: 332204-9026, 332204-9183, 332204-9042, 3322049016, 332204-9006 That portion of the northwest quarter of the southwest quarter of the southeast quarter of Section 33, Township 22 North, Range 4 East, W.M, in King County, Washington: Full legal description attached hereto as Exhibit `1 " and incorporated herein by this reference. ("Property") hereby grants an irrevocable license to the City of Federal Way ("City") and the City's agents, employees, contractors or representatives to enter upon the Property to inspect the construction of improvements, the performance of work or to allow the City to perform any necessary maintenance or work, all pursuant to that certain Agreement and Contingency, Monitoring and Maintenance Bond of even date entered into between the City and the undersigned and incorporated herein by this reference. DATED this d?/ day of 19 97 PARKLANE VENTURES, INC. u3w�� _ (Signature) At eo* [Corporate Notary] STATE OF WASHINGTON } I ss. COUNTY OF KING I On this day personally appeared before me V�O Gr/. /ilG3C�rfD,eJ to me known to be the /il of AAW,:~ Vp�,00,'r the corporation that executed the foregoing License, and acknowledged the said instrument to be the free and voluntary -.: r) act and deed of said corporation, for the uses and purposes therein mentioned, and on oath stated that he/she was authorized to execute said instrument and that the seal affixed, if any, is the corporate seal of said corporation. GIVEN my hand and official seal this ;,2/.,,4Lday of 191-7 r (not ' y signature) (typed/printed name of notary) Notary Public in and for the State of Washington. My commission expires g a; FILED FOR RECORD AT REQUEST OF: Parklane Ventures, Inc. MAIL TO: CITY OF FEDERAL WAY 33530 1 ST WAY SOUTH FEDERAL WAY, WA 98003 ATTN: Stephen Clifton EXHIBIT D LICENSE C(Opy The undersigned owner of certain real property located in Federal Way, Washington and legally described as follows: TAX PARCEL NOS: 332204-9026, 332204-9183, 332204-9042, 332204-9016, 332204-9006 That portion of the northwest quarter of the southeast quarter of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington: Full legal description attached hereto as Exhibit ' 1 " and incorporated herein by this reference. ("Property") hereby grants an irrevocable license to the City of Federal Way ("City") and the City's agents, employees, contractors or representatives to enter upon the Property to inspect the construction of improvements, the performance of work or to allow the City to perform any necessary maintenance or work, all pursuant to that certain Agreement and Performance/Maintenance Bond of even date entered into between the City and the undersigned and incorporated herein by this reference. DATED this Z/ day of / 1 . 1997 Parklane Ventures, Inc. } (Signature) [Corporate Notary] Y STATE OF WASHINGTON ) ) ss. o COUNTY OF KING ) o; 0 On this day personally appeared before me to me known to be the ' of �;r N 0,&,,00 , the corporation that executed the foregoing License, and acknowledged the said instrument to be the free and voluntary act and deed of said Cn M1 Ql corporation, for the uses and purposes therein mentioned, and on oath stated that he/she was authorized to execute said instrument and that the seal affixed, if any, is the corporate seal of said corporation. GIVEN my hand and official seal this 2( day of 5r ixwe , 19 � zap (noteysignature) (typed/printed name of notary) Notary Public in and for the State of Washington. My commission expires ��'^/� —F [individual Notary] STATE OF WASHINGTON ) ) ss. COUNTY OF KING ) On this day personally appeared before me, to me known to be the individual(s) described in and who executed the foregoing License, and on oath swore that he/she/they executed the foregoing instrument as his/her/their free and voluntary act and deed for the uses and purposes therein mentioned. GIVEN my hand and official seal this day of , 19 (notary signature) (typed/printed name of notary) Notary Public in and for the State of Washington. My commission expires KAdocu nWwrkpe4n2 01-2"7 Ilawl FILED FOR RECORD AT REQUEST OF: Parklane Ventures, Inc. MAIL TO: CITY OF FEDERAL WAY 33530 1 ST WAY SOUTH FEDERAL WAY, WA 98003 ATTN: Stephen Clifton EXHIBIT C LICENSE 00 1 The undersigned owner of certain real property located in Federal Way, Washington and legally described as follows: TAX PARCEL NOS: 332204-9026, 332204-9183, 332204-9042, 332204-9016, 332204-9006 That portion of the northwest quarter of the southeast quarter of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington: Full legal description attached hereto as Exhibit "1" and incorporated herein by this reference ("Property") hereby grants an irrevocable license to the City of Federal Way ("City") and the City's agents, employees, contractors or representatives to enter upon the Property to inspect the construction of improvements, the performance of work or to allow the City to perform any necessary maintenance or work, all pursuant to that certain Agreement and Maintenance Bond of even date entered into between the City and the undersigned and incorporated herein by this reference. DATED this Z/ day of f . 1997 Parklane Ventures, Inc. g�- (Signature) �n [Corporate Notary] STATE OF WASHINGTON ) ) ss. 1214 IO GV/ 1110. Mif0-/ COUNTY OF KING �v —� - rr• --r .aV re_go, is day personally appeared before me �7� , to me known to be the frrrP7� of i Jt%�l�i tiJ�il:�f� I/� ' ,the corporation o that executed the foregoing License, and acknowledged the said instrument to be the free and voluntary act and deed of said corporation, for the uses and purposes therein mentioned, and on oath stated that 3 D N4 7 O 7 �7 7 Ca was authorized to execu, Aid instrument and that the seal affixed, if any, is the corporate seal of saidhe/scorporation. said corporation. GIVEN my hand and official seal this 2( y of i�rr� , 1997, ne 0 �TAR (typed/printed name of nota 1 �-►•♦— "" PUBLIG f Notary Public in and for th State of j4V shington. My commission expires ; WAS��� [Individual Notary] STATE OF WASHINGTON ) ) ss. COUNTY OF KING ) On this day personally appeared before me, known to be the individual(s) described in and to me who executed the foregoing License, and on oath swore that helsheithey executed the foregoing instrument as hislherttheir free and voluntary act and deed for the uses and purposes therein mentioned. GIVEN my hand and official seal this day of 19 (notary signature) (typed/printed name of notary) Notary Public in and for the State of Washington. My commission expires g hR a Y E FILED FOR RECORD AT REQUEST OF: Parklane Ventures, Inc. MAIL TO: CITY OF FEDERAL WAY 33530 1 ST WAY SOUTH FEDERAL WAY, WA 98003 ATTN: Stephen Clifton EXHIBIT C ❑ LICENSE The undersigned owner of certain real property located in Federal Way, Washington and legally described as follows: TAX PARCEL NOS: 332204-9026, 332204-9183, 332204-9042, 332204-9016, 332204-9006 That portion of the northwest quarter of the southeast quarter of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington: Full legal description attached hereto as Exhibit "1" and incorporated herein by this reference ("Property") hereby grants an irrevocable license to the City of Federal Way ("City") and the City's agents, employees, contractors or representatives to enter upon the Property to inspect the construction of improvements, the performance of work or to allow the City to perform any necessary maintenance or work, all pursuant to that certain Agreement and Maintenance Bond of even date entered into between the City and the undersigned and incorporated herein by this reference. DATED this S day of 19 97 Parklane Ventures, Inc. fljXLJ4,A� (Signature) [Corporate Notary] STATE OF WASHINGTON } } ss. COUNTY OF KING On this day personally appeared before me l/ to me known to be the of , the corporation that executed the foregoing License, and acknowledged the said instrument to be the free and voluntary act and deed of said corporation, for the uses and purposes therein mentioned, and on oath stated that he/she was authorized to execute said instrument and that the seal affixed, if any, is the corporate seal of said corporation. GIVEN my hand and official seal this day of (notary signature) 19 (typed/printed name of notary) Notary Public in and for the State of Washington. My commission expires [Individual Notary] STATE OF WASHINGTON ) ► ss. COUNTY OF KING ) On this day personally appeared before me, �� ' '�� to me known to be the individual(s) described in and who executed the foregoing License, and on oath swore that he/she/they executed the foregoing instrument as hisAwfteir free and voluntary act and deed for the uses and purposes therein mentioned. GIVEN my hand and official seal this Notary Public in and for t.e State aWashington. My commission expires WHEN RECORDED, RETURN T0: Parklane Ventures, Inc. 31624 23s° Ave S, #320 Federal Way, WA 98003 HERITAGE WOODS DIVISION I DECLARATION OF PROTECTIVE COVENANTS, CONDITIONS AND RESTRICTIONS WHEREAS, PARKLANE VENTURES, INC., a Washington corporation, (herein referred to as Dech-trant), is acquiring certain real property in icing County, Washington, mayacquire other property in King County, and is the owner of the property platted as HERITAGE WOODS DIVISION 1, according to the pint there of recorded at Voltune i:*q of Plats, pages _39 - _��_, under RecordingNo. q�•O$Ofo — 01" in King County, Washington, and desires to establish a plan of private subdivision !'or all of such properties. In order to provide for land use restrictions as a part of such plan, Declarant does hereby declarc and establish (lie JbIlowing restrictions, covenants and easements Appurtenant: ARTICLE A C(Olply Definitions Section I. Definitions. As used herein: 1. The word "flat" shall refer to the plat of HERITAGE WOODS DIVISION I, and any other plat of real property which may hereafter be made subject to the provisions hereof by written instrument signed by Declarant as provided in Section 4, Article F. 2. The word "Lot" shall refer to a lot as shown on any Plat as defined hereby but shall not include a parcel designated as "Tract" on a flat. 3. The word "Subdivision" shall refer to the real property included within any Plat as defined hereby. 4. The words "Community Organization" shall refer to the HERITAGE WOODS Community Organization, a nonprofit corporation formed for the purpose of enforcing these covenants and providing other things that may benefit its members. Article C. The word "Committee" is defined as the Architectural Control Committee as provided in ARTICLE B Building and Land Use Restrictions Section 1. Improvements. No dwellings, residences, out -building, fence, wall, building, pool or other structure or other improvement shall be erected, altered, placed or maintained on any Lot unless it shall comply with the following: (a) Prior to placing any such structure or making any such improvement on the Lot, the plans and specifications f'or the structure or improvement and a request for approval shall be submitted to and approved by the Committee as provided in Article C. When constructed or placed on the Lot, the structure or improvement shall substantially conform to the plans and specifications as approved by the Committee. b) Prior to making any change or alteration to the external appearance of any improvement on a Lot, plans and specifications for the alteration and change shall be submitted to and approved by the Committee as provided in Article C. When made, the changes or alteration shall substantially conform to the plans and specifications as approved by the Committee. c) Once started, the work of constructing, altering, repairing or reconstructing any structure or improvement on a Lot shall be diligently prosecuted until completion thereof and in any event the exterior of the structure shall be completed and finished within six months after the work first commences. No structure may be placed or erected on a Lot except by a person or firm holding a valid contractor's license. (d) • All buildings and improvements on a Lot shall be of permanent construction, and no temporary structure, trailer, mobile home, tent, garage, outbuilding or other similar device shall be placed on any Lot, except with the permission of the Committee incident to and during the construction of the first permanent improvement on the Lot. 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V1 ❑ y ,� C� C �+ ..•. ..>i fL. ❑ ❑ V p 0073. d 1 m U lu o (V Section 2. Submission ot'Plans. All plans and specifications or information required to be submitted to tile Committee for approvals shall be submitted by mail to lire address of the Committee in duplicate, shall be in writing, shall contain a written request for approval and the name and address of the Person submitting the same and the Lot involved, and shall set forth the following, with respect to a proposed structure: The location of the structure upon the Lot, the elevation of the structure with reference to the existing and finished lot grade, the general design, the interior layout, the exterior finish materials and t:olar including roof materials, the landscape plan, and such other information as may be required to determine whether such stricture conforms with these restrictions, Section 3, Standards. The Committee shall have the authority to determine and establish standards involving esthetic considerations of harmony of construction and color which it determines to be in tile best interest of providing for attractive development of the subdivision, which authority shall include but not be limited to the height, configuration, design and appearance of the dwelling and fences, walls, outbuildings, pools, and other structures and improvements appurtenant to the use of dwelling. Such determinations may be amended and shall be binding on all persons. Section 4. At)rsrovsti or Disapproval. Within thirty days after Elie receipt of plans and specifications or inforrrlation with a request for approval, the Committee shall, by majority vote, Approve or disapprove the recltlest .lnci nhay disapprovc the request which in its opininn does lhal conform to these reslrit; liunti m. Its esibutic or tither sta udards. Approval or disapproval of'a request shall be made upon one cll'thc cctl)its [I+c,'t iintl rtturrled it) the: address shown Utt Elie request. ill tilt event that no disapproval of a request iS 4lV(M Within thll-ty days of submission in compliance herewith, the request shall be deemed approved. Section 5. Advisors. The Committee may appoint advisors or advisory committees from time to time to advise on matters pertaining to the Subdivision. No person on the Committee or acting for it shall be responsible for any defect in any plan or specification submitted or approved not, for any defect in any work done according to such plans and specifications. Section 6. Variations. The Committee shall have the authority to approve plans and specifications which do not conform to these restrictions in order to overtone practical difficulties or prevent hardships in the application of these restrictions; Provided that such variations so approved shall not be materially injurious to the improvements of other Lots and shall not constitute a waiver of the restrictions herein contained but shall be in furtherance of the purposes and intent of these restrictions. ARTICLE D Easements and Open Space Section 1. Drainage Easements Structures, fill or obstructions (including but not limited to decks, patios, outbuildings, or overhangs) sliall not be permitted beyond the building setback line or within drainage easements. Additionally, grading and construction of fencing shall not be allowed within the drainage easements shown on this plat snap unless otherwise approved by the City of Federal Way. All building downspouts, footing drains and drains fi-orn all impervious surfaces such as patios and driveways shall be connected to the approved permanent storm drain outlet as shown on the approved construction drawings. All connections of the drains must be constructed and approved prior to the final building inspection approval. individual lot infiltration systems, where permitted, shall be constructed at the time of the building permit and shall comply with code requirements of the City of Federal Way. All individual storm drain stub -outs shall be privately owned and maintained by the lot owner. Section 2. —Tracts C, D, & F and Sensitive Area Tracts No building shall be constructed or located in tracts C, D, or F and such tracts shall not be further subdivided or used for financial gain. Any vegetation removal, maintenance or other activity in tracts C, D, or F requires the prior approval of the City of Federal Way Community Development Services Department. Tracts C, D, and F are environmentally sensitive areas and are permanent open space tracts. The tracts arc set aside and reserved for permanent open space for the benefit of present and future owners of lots in this subdivision. An educational brochure on the value and function of neighboring wetlands and native growth protection easements shall be provided to each purchaser of a lot within this plat by the seller and shall be filed for record with each lot. Section 3. Sensitive Area Tracts C D, & F Declarant shall cause Sensitive Area Tracts C, D & F of the Plat to be quit claimed and conveyed to the Heritage Woods Community Association. The owners of interest in the land hereby do grant and convey a perpetual easements in Tracts C, D & F for the use and benefit of all present and future owners of the lots in this subdivision. Such Tracts shall not be used for any other purpose than for Open Space consistent with the applicable regulations of tile f e City o Federal Way in effect from time to time and for recreational use by the owners and residents of Lots. As a condition of approval, the declarant(s) of interest in the land hereby subdivided do grant and convey a perpetual easement in Tracts C, D & F for the use and benefit of all present and future owners of the lots in this subdivision. Except as shown on the plat, no building shall be placed on Tracts C, D & F and such Tracts shall not be further subdivided or used for financial gain. No over -the -slope dumping of soils, vegetative waste or debris is allowed in the Open Space Tracts. The HERITAGE WOODS Community Organization shall be responsible for the perpetual maintenance and protection of these Sensitive Area Tracts. Section 3.1 Maintenance - Tracts A3, C, D, & E. Tract "A" is designated as Open Space and is hereby dedicated to the City of Federal Way. Tnict "B" is desigml(cd as Upon Space/Nedeslrian Pathway and is hereby dedicated to the City of Federal Way. Tracts "C" and "D" are designated as Sensitive Area and Open Space, and are owned and maintained by the Heritage Woods Community Organization, who shall be responsible for perpetual maintenance. Tract "E" is a drainage tract and shall be dedicated to the City of Federal Way for ownership and the construction, maintenance, upgrading, etc., of the storm drainage facilities located thereon with the recording of Division 2. In order to preserve the natural infiltration characteristics of the area, there shall be no development of any organized recreational activity facility without the prior written approval of the City of Federal Way Department of Public Works, or its' successor agency. Tract "H" has been developed for the further subdivision and use as two single family lots, upon approval by the city of Federal Way of an acceptable grading plan. Tract "J" has been developed for the further subdivision and use as four single family lots, upon approval by the city of Federal Way of an acceptable grading plan. Section 4. Landscaping & Maintenance in public right-of-way areas. Prior to occupancy, the property owner shall install street trees between the street curb and sidewalk, along the lot frontage as per the approved landscape plan fled with the city of Federal Way, and as set forth in Schedule A -- Boulevard Street Trees, hereto attached. The specific planting locations shall be shown by the property owner, and approved by the city, on the building permit site plan for each lot. Maintenance of landscaping in planter islands located in road right-of-ways shall be the responsibility of adjacent lot owners. Section 5. Maintenance of Common Landscape areas , Entrance Area landscape features and associated lighting and irrigation systems in easements, shall be owned, operated and maintained by the HERITAGE WOODS Community Organization. Section 5.1 Perimeter Fencing. Perimeter Fencing shall be maintained by the owners of adjoining lots, however, [lie Community Organization shall have the right to assume such responsibility for maintenance should they elect to do so. Section G. Sensitive Area & Open Space & Wettand - Tract D and E. Annual monitoring of the wetland areas located in Tracts "D" and "E" shall be the responsibility of the Declarant for a period of five (5) years after acceptance by the Federal Way. ARTICLE E Liens Section 1. Community Organization Membership. There shall be one membership in the Community Organization for each Lot in the Subdivisions subject hereto and no more. The fee title owner of each Lot which is not subject to a recorded contract for purchase and sale of the Lot or the holder of the vendee's interest under a recorded contract for purchases and sale of each Lot shall hold a membership in the Community Organization. Such membership shall be appurtenant to and not severable from such fee ownership or vendee's interest and shall transfer with the transfer of the fee title or vendee's interest without further action on the part of the Community Organization or its several members. Membership shall stand in the name or names of the persons or parties who have such interests from time to time as they may appear in the public record. 4 .Section 2. Liens. In order to provide for the proper operation of the HERITAGE WOODS Community Organization and the maintenance and improvement of any property wltich the Community Organization acquires for the benefit of the Lots, each grantee and vendee of Lots, their heirs. successors and assigns shall and do, by the act of accepting a deed or entering into a contract of sale as vendee, jointly and severally agree that they and each of them shall be members of the COMMUnitV Organization and shall pay to the Community Organization the dues and charges levied according to the Articles of Incorporation and Bylaws of the Community Organization against them as members of the Community Organization. Ill the event that any such dues or charges remain unpaid to the Community Organization for a period of sixty (60) days after the due date, then the Community Organization may place a written notice of public record in King County, Washington, that the Community Organization claims a lien against the Lot to which the membership is appurtenant for the amount of delinquent dues and charges together with interest at the rate of twelve percent per annual fi-om the date due until paid and attorney's fees as herein provided. From and after recording such notice, and not prior to such recordin-, the Lot to which the membership is appurtenant shall be subject to a lien to the Community OrgliliLition as security for all unpaid dues and charges in the amount designated therein with interest and attorneys' fees, together with all future unpaid does and charges accrued until the lien arising because of the notice is released by the Con1u11unity Organization. The lien herein granted to the Community Organization shall be suhordinaile to the lien of' ally hona tide mortgage or deed of' trust given for- value recorded prior to the recording of (lie notice of cliiiui of lien. A release of a lien span only release the lien arising because of the notice but not rights under (his ArliCle to life a subsequent notice of claim of lien for subsequent delinquencies after a notice is released. Such lien may be foreclosed in the manner of a mortgage of real property and in such foreclosure action the Community Organization shall recover a reasonable sum zs attorney's fees therein and the reasonable and necessary costs of searching and abstracting the public record. Notwithstanding any provisions hereof appearing to the contrary, the sales or transfer of title to a Lot pursuant to a mortgage: foreclosure or any proceeding in lieu thereof, shall extinguish the lien created hereby for any unpaid dues and charges which became due prior to such sale or transfer; provided that no sale or transfer shall relieve such Lot from a lien for dues and charges thereafter becoming clue and provided further that "mortgage" as used in this sentence means a mortgage, deed or trust or other security given for a debt which is guaranteed by the Veterans Administration or insured by The Federal Housin(l Administration as agencies of the United States government. ARTICLE F Application and Enforcement Section I. Effect. The covenants, restrictions, easements, rights, liens, and encumbrances herein provided for shall be covenants running with the land and shall be binding upon the Subdivision and any and all parts thereof, the parties in interest thereto and their heirs, assigns, personal representatives and SUCCesSdrS in interest. Accepting an interest in. and to any portion of the Subdivision shall constitute an agreement by arny person, firm or corporation accepting such interest, that they and each of them shall be bound by and subject to the provisions hereof. Sect-ion_2. Severnbiiity. In the event that any provision hereof shall be declared to be invalid by any court of competent jurisdiction, no other provision shall be aft'ected thereby and the remaining provisions shall remain in full force and effect. No waiver of the breach of any provision hereof shall constitute a waiver of a subsequent breach of the same provision or of any other provision. No right of action shall accrue for or on account of the failure of any person to exercise any right hereunder nor for imposing any provision, condition, restrietion or covenant which may be unenforceable. Section 3. Earorceinent. The parties in interest in and to any part of the Subdivision and the Community Organization, for the benefit of the owners of the Subdivision, and each of them shall have the right and authority to enforce the provisions hereof and in addition to any other remedy for damages or otherwise, shall have the tight to injunctive relief. The prevailing party in any action to enforce any provision hereof shall recover a reasonable suns as attorneys' fees together with the reasonable costs of searching and abstracting the public record which sums shall be paid by the unsuccessful party. Section 4. Additional Property. in addition to the real property which is platted as HERITAGE WOODS DIVISION 1 from time to time, but not after December 31, 2005, the Declarant, Parklane Ventures, Inc., inay subject additional adjacent real property in Section 33, Township 22N, Range 413, W.M., in King County, Washington, to the provisions of this instrument as a part of the plan of subdivision of real property by tiling of record a declaration expressly setting forth such intent signed by Parklane Ventures, Inc., as the subdivider thereof. Parklane Ventures, Inc. may assign its rights under this Section 4, but only by written instrument which contains an express reference to this Section 4. Except for the foregoing no other properties may be made subject hereto. ARTICLE G Amendment Section I. Amendment of Use Restrictions. Articles B and C of this instrument which relates to use of the Lots in the Subdivision may be amended and changed by the written consent of the e owners of the fee title (in the case title is subject to a real estate contract, the vendees under the real estate contract shall be deemed to be Owners of the fee title) of not less titan sixty (60%) of all of (lie Lots in all of (lie Subdivisions which have been made Subject to (lie previsions of this Decialiltiotl. 1'111- the purpose of intendment, Consent to ill amendment by a ice maer shall be binclllig upon (he inner and (if tiny successors to the ice title for a period of six months alter it is given I'm the purpose of calculating; the percetkilge required Im- adoption of 111c cotnsetit. Collsenis required under this Section shall be delivered to the Community Organization which shill tabulate them. Its determillation of the sut'licielicy of' (lie consent shall be conclusive, and an amendment to Articles B .and C shall be effective wl)en a written Notice or Amendment signed and ackitowledged by Elio president and secretary of tale Community Orgallizatioll is recorded ill King; County, Washington, stating (hat the requisite consetlt hus been obtained and setting forth the aniendnient in its entirety. EXECUTED TI-HS J� day of /1�0 .199.7 14e� PARKLANE VENTURES, INC. BY: David Morrison, Gencral Manager STATE Or WAS111NGTON ) ) ss. COUNTY OF KING ) I certify that I know or have satisfactory evidence that DAVID MORRISON signed this instrument, on oath stated that he was authorized to execute the instrument and acknowledged it as the GENERAL MANAGER OF PARKLANE VENTURES, INC. to be (he free and voluntary act of such party for the uses and purposes mentioned in the instrument. DATE D:�4� ,s , 199AiA> (SEAL) i Notary 11u tic Residing at_r-7 WOZI It ` My appointment expires Slotl1``'+� 4 ! 40 �• ••, '°Ugly ' � ` ittl wA9k0--- lot SCHEDULE A Boulevard Street Trees Each property owner shall install street trees as noted below, within the Boulevard section fronting the street in front of their lot, prior to any building occupancy. The specific planting locations shall be shown and approved on the Building Permit Site Plan for each lot. LOT # NO. OF TREES SIZE SPECIES 1 3 2-1/2" Red Oak 2 3 11Red Oak 3 3 Red Oak 4 3 Red Oak 5 3 Red Oak 6 3 Red Oak 7 6 114 _ Red Oak, 2 Little Leaf Linden 8 2 �" Little Leaf Linden 9 2 Little Leaf Linden 10 2 Little Leaf Linden 11 2 Little Leaf Linden 12 2 Little Leaf Linden 13 2 Little Leaf Linden 14 2 Little Leaf Linden 15 2 Little Leaf Linden_ 16 1 Little Leaf Linden 17 1 Little Leaf Linden 18 5 Little Leaf Linden 19 3 Little Leaf Linden 20 6 4 Red Oak, 2 Little Leaf Linden 21 3 Red Oak 22 3 Red Oak 23 3 Red Oak 24 3 Red Oak 25 2 Red Oak 26 5 " _ 2 Red Oak, 3 Scarlet Ma lie __ 27 1 2-1/2" Scarlet Maple 28 1 Scarlet Maple 29 1 Scarlet Maple 30 1 Scarlet Maple 31 1 Scarlet Maple 32 5 y_ _ 2 Scarlet Maple, 3 Red Oak 33 3 Red Oak 34 4 3 Red Oak, 1 Scarlet Maple 35 2 2 Scarlet Maple 36 1 Scarlet Maple 37 1 Scarlet Maple _ 38 5 1 Scarlet Maple, 4 Red Oak 39 8 4 Red Oak, 4 Scarlet Ma 7l�_e 40 3 Scarlet Map -le 41 3 Scarlet Maple 42 3 Scarlet Maple 43 3 Scarlet Maple _ 44 2 Scarlet Maple Trct. J 5 2-1/2" Scarlet Maple_ _ Trct. H 12 115 Scarlet Made, 7 Red Oak 45 3 Red Oak HERITAGE WOO L - COMMUNITY ORGANIZATIO`t,,:ONTACT n Until such time as a board of directors has been elected from aniong the homeowners at HERITAGE WOODS to handle association func(ions for the HERITAGE WOODS Community Organization, the Declarant, Parklane Ventures, Inc., will handle all concerns with respect to covenant enforcement and architectural approval for the community of HERITAGE WOODS. Parklane Ventures, Inc, may be reached at (206) 946-3652 or FAX# (206) 946-3580 or by mail at: 31620 23`d Ave S, #320, Federal Way, WA 98003. As per Article B of the Declarations, Building and Land Use Restrictions, requests for Architectural Approval shall include, but not be limited, to the following in duplicate: Plans, material specifications, plot plan showing location of' (lie proposed improvement, architectural drawings, illustrations, paint samples, etc. Submittals for Architectural Approval should be mailed to their office at: Ilarkhme Ventures, [tic. 31620 23`1 Ave 5,11320 Federal Wary, WA 98003 7 r WHEN RECORDED, RETURN TO: Parklane Ventures, Inc. 31620 23r° Ave S, #320 Federal Way, WA 98003 DECLARATION ADDING PROPERTY TO DECLARATION OF PROTECTIVE COVENANTS FOR HERITAGE WOODS DIVISION I WHEREAS, PARKLANE VENTURES, INC., a Washington corporation (Herein referred to as Declarant), is the owner and subdivider of the property platters as HERITAGE WOODS DIVISION I, according to the plat thereof recorded at Volume _a4 _of Plats, pages _fj_ & �,, in King County, Washington (herein called the Plat), and pursuant to the authority reserved under Section 4 of Article F of that certain Decl;,rrrlicrn �l' Protective Covenants for HERITAGE WOODS DIVISION I as recorded under Recording too. � in King County, Washington (herein referred to as the Covenants, all as a part of the plan o(' private subdivision referred to in the Covenants. THEREFORE, Declarant intends to subject the real property encompassed by and platted as HERITAGE WOODS Div. 11, as described above, to the terms, conditions, covenants and provisions of the Covenants and the covenants, easements, rights, liens and encumbrances as therein provided shall be covenants running with the land encompassed by the Div. I Plat and any and all parts thereof all as more particularly provided for in the Covenants. DATED: S , 19 97 PARKLANE VENTURES, INC. By: _ David Morrison, Its' General Manager STATE OF WASHINGTON COUNTY OF KING I certify that 1 know or Have satisfactory evidence that DAVID MORRISON signed this instrument, on oath stated that lie was authorized to execute the instrument and acknowledged it as the General Manager of PARKLANE VENTURES, INC. to be the free and voluntary act of such parry for the uses and purposes mentioned in the instrument. DATED: F�Q It—) . 1997. V0j�j'►r 1om ►,� Aw r' + ) OP W ASN4101 ,-1 Notary Public Residing in_14t 8aila My appointment expires 6 - aj%OCi HERITAGE WOODS COMMUNITY ORGANIZATION BYLAWS Pursuant to Article E of the Declaration for HERITAGE WOODS, as recorded under King County Recording No. gJ0306-;4q$ , Washington, the following constitute the Bylaws of the HERITAGE WOODS Homeowners Association (the "Association") which the Declarant hereby adopts: ARTICLE I. MEETINGS Section 1. Annual Meeting of Association. Unless a majority of the homeowners present at a meeting of the Association determine otherwise, the annual meeting of the members of the Association shall be held each year at 7:30 p.m. on a day and at a place designated by the Directors in the same month in which the initial meeting ol'thc Association is held commencing with the year following such initial meeting. The purpose o1' the annual meeting shall be to elect Directors and to consider such other business as may come before the meeting. Section x. Special Meetings of the Association. Special meetings of the members of the Association shall be held on call of the Chairman, any Director or the owners of lots having combined more than twenty votes. Special meetings shall be held for such purposes as may be set forth in the notice thereof, which notice shall be given by the Secretary of the Association when requested by the persons entitled to call the meeting. Section 3. Notice. Notice of each meeting of the Association shall be given in writing and shall state the date, time, place and purposes of the meeting. Notices shall be deposited in the United States mail, postage paid, addressed to each owner at the address of the owner shown on the records of the Association. Notices of meetings of the Association members shall be mailed not less than 10 days nor more than 30 days prior to the date for the meeting. Any member may waive notice of any meeting at any time in writing. Section 4. Conduct of Meeting. Conduct of meetings of the Association shall be governed by the Roberts Rules of Order, current edition. No quorum shall be required at any meeting of the Association. Section 5. Proxy. Members of the Association may exercise heir votes by proxy which shall be in writing and delivered to the Secretary before the meeting is convened. Section G. voting. The owner or owners of a lot shall have one vote per lot. Such vote shall be exercised by only one person on behalf of the owner or owners. Owners of each lot may not divide votes between persons who are owners of one lot. At the request of the Chairman at a meeting the owners of each lot who are present shall identify who is to exercise the vote for the owners of the respective lot. The Chairman will recognize the right of any person present who is one of several individuals owning, a lot, a partner of a partnership owning a lot or a corporate officer of a corporation owning a lot, as a person entitled to exercise the vote for the owners of the lot. Section 7. Balloting. In order to facilitate counting and verification of votes cast on each written ballot, if requested by the Chairman, the person exercising tine vote shall identify on the ballot the lot number to which the ballot is entitled, provided that after the ballot is tabulated, received and accepted, the ballots shali be destroyed and the persons who conducted the ballot count shall treat as confidential the !manner in which the vote of each lot was cast. Other methods of facilitating verification of votes cast may be required to be complied with by the Chairman. The Chairman shall have the right to designate the person or persons who shall count ballots and report the results to the Chairman. 9 ARTICLE 11. OWNERS' COMMITTEE Section I. Appointment. Until the Directors are elected, the Declarant may, in its discretion, appoint a committee from the various owners of lots to constitute an Owners' Committee. Insofar as possible, the Declarant shall endeavor to select members for the Committee from residents of each of the several lots as such residents become available. Section 2. Duties and Status, During its existence, if requested by the Declarant, the Owners' Committee shall act as advisor to the Declarant in management of the property, shall provide liaison between the owners and the Declarant, shall assist in assembling a slate of nominees to present at the initial meeting of the Association and shall do such other appropriate things as the Declarant may request to assist in the management of the property and the organization and operation of the Association during the initial lwriod preceding election of Directors. Where the first Directors are elected, the C'omilllttee will termillate and no longer exist. ARTICLE III. DIRECTORS Section 1. Election of Directors. If more than one Director is to be elected at a meeting, then each Director shall be elected separately so that, for example, the first vacancy shall be filled by election before the nominations are closed and election is held for the second vacancy. The nominees for each vacancy who receive the most votes at the election shall be elected regardless of whether such nominee receives a majority of votes cast. The Directors shall have the authority set forth in the Declaration and as granted by the Association from time to time. The remaining Directors shall elect a person to fill any vacancy in office for the balance of the term. Section 2. Nominations. Nominees for director may be proposed by committee, and nominations may be received from the floor. Section 3. Removal. Any one or more Directors may be removed by the affirmative vote of more than 60% of votes cast for removal at a special meeting called for that purpose. Section 4. Meetings. The Directors shall hold regular meetings from time to time as they deem advisable. A special meeting may be called by any Director or by the Chairman. Notice of a meeting may be written or oral and shall be delivered to each Director at least 24 hours prior to the time of the meeting stating the time and place of the meeting, and if it is notice of a special meeting, its purpose. Any business may be conducted at any regular meeting. Notice of a meeting may be waived in writing by any Director at any time. Section S. Maintenance and Additions. Subject to such limitations and authorization as may be contained in the Declaration, at their meetings the Directors shall determine how the necessary work of maintenance, repair and replacement of the common areas and facilities shall be carried out. In this respect, the Directors may delegate authority to third persons, contract for such work, cause the same to be performed by employees of the Association or use such methods as the Directors deem best and most convenient. Subject to approval by vote of the owners as required by the Declaration, the Directors shall have the same discretion in making any addition or improvement to the common areas and facilities as they have in determining how the necessary work of maintenance, repair and replacement of such areas and facilities is to be carried out. ARTICLE IV. OFFICERS AND AGENTS Section 1. Officers and Committees. The Directors shall elect a Chairman, a Secretary and a Treasurer of the Association. In addition, the Directors may create such other offices and committees as they deem advisable for the caretaking management of the property. All of the officers and committee members shall be responsible to the Directors who may define their authority, duties and responsibilities from time to time. Section 2. Agent. The Directors may appoint a manager authorized to conduct all or any part of the day-to-day management of the property and delegate to such H manager such duties and authority as the Directors deem advisable. The Directors may compensate the manager and any officer for services perfornned. The fact that a person is elected to office shall not give rise to any contract for compensation without an express written agreement for payment of compensation which agreement has been approved in advance by the Directors. Each manager, officer and Director shall be entitled to reimbursement for reasonable and necessary expenses incurred in the business of the Association. ARTICLE V. REGULATION OF PROPERTY AND RULES Section 1. Authority. Within the limitations contained in the Declaration, the Directors shall manage the property. Section 2. Rules. Subject to the limitations contained in the Declaration. rules governing the use of the property may be adopted, changed, amended and repealed by the Directors on behalf of the Association. When so adopted and communicated to the uwncrs, Such rules shill be complied wish and may be enforced by legal action as provided 101- by law. Commiuzica[ion of a rule shall be deerned complete upon all of the individuals who are owners of any lot when a copy thereof is either mailed to the owner of a lot at the owner's address shown on the retards of the Association or is delivered to one or more of the individuals who are owners of a lot. Any part of all of the rules may be "amended, altered, changed or repealed at any meeting of owners called for that purpose. ARTICLE VI. AMENDMENT Section 1. Amendment. These bylaws may be amended at any meeting of the members of the Association called for that purpose or at any annual meeting. Proposed amendments shall be read at two consecutive meetings before they may be adopted and no proposed amendment may be voted upon or considered unless it has been reduced to writing before the first reading. The foregoing comprise the Bylaws of HERITAGE WOODS Community Organization adopted by the Declarant on F-✓"3 . 5 , 1997. AAOG PARKLANE VENTURES, INC. a Washington corporation By. rr¢fy, C107 David Morrison, General Manager IIERITAGE WOODS HOMEOWNER'S SENSITIVE AREA & WETLAND BROCHURE The following verbage is incorporated into a Wetland and Sensitive Area Brochure to be distributed to tach homeowner in Heritage Woods. IIOMIE TiPS FOIL CLEAN STREAMS AND Ivli'l-LANDS When r*fq fa111 on nndevcloped Ned, tho formes and lipldr fo1 most of that tninfult xuzlk two she ground. Svmt water Rows overland to slrtimin, lakoe or wctlnnda; most flutvr slowly undi:icitnsrd to feed streams end lakes er >2tnurlthvster. llosovw, when urban and Iubvrban devcltrpincnl euver8 Iho Nild with bafldhigs, hursae sad slreelr, the lives, %brubt, stirs, and iopsull aro rapfeccd by namyvruus oonamic cud nsplmtr. Less this can lock Into llte Sall nlld Ilse ,n.+sit fs 'wrban tlmoff"; welter stnya on du Sulrltla alsd gnlckly rues off Into tt0101 drallta, ditctxr or stu:dnt and iban dit"lly Into aitr inkas and fagcl Sound, Utban ninuff pnllutos and Roods auerttna, Runner csrtiaa with It filter, oil, gar_ fertilizer, pesdcljt$ slid anything else Ibal %rill (lost, dissolve, or ba tilovild atona. The suers julittt 1bh[ edgy moat of this Ttrilorl' noually'low unirr:llcd ]niv sltosrnS ar lakes. Asmura tvatcr is reread to rue off, dorstslecam Doedin; bcceunza werxa a] %yell lit more frrquent. racrcnrod lloadintt wri3ltes osyay arroorn tmnki and destroys snimon splivellinC beds, net to mrsttlou property. Not nil or our -star rmblema have tbelr yaarcn Ili doll arbnn nrvas. Aural activities all A as hirtril"8. ranching and timber Ilirvcatlng ntSo dffeet due iluultly, of suitor Its our aacams, Isket Pod roget Sound. None or Ihosa Problems aro inmirmomittiblt — far from fr. With proper nlanitgcrocnt "lid eoaltllan souse we con all erdvy elm1110, elfer Willer. Evctyons must help to step tivnter RDINFlon. It's city to put sit llte blame for ditty volor an govettimanl and 6tit bpelgcss, but a very siguiric;lItt pounce of the problelll -.tans sight al ttoate. tudustty stud goverelmenl are smiting to du tf+ctr shire; this ptpiphlol %sill belt' you do yourx. 711S FOR IAWN AND CAM= j`crllcidca end wets] killers crania aesfous ploblem:l when they tvucr lakes, wetlrmris ar rlreama Some citni kills al ay ActiYo rpr a Ions lime and Wlid tip In the tnviratmeni. Otheri kill dc:frnble fnscc;s, retie„wlsgildplistUoa%reflacPeefr. Ferttllxcrs-hods chemist] iod urgatde - chose excess weed wid argic growth %%hell Iliry enter water. Tllis growth Ilot only Tooke and smells kid, but it depUlea 16v vnler of oxylrcn old chokes txit not and w(marc, ENCUUAXACE INSECT-VATIN13 BIRDS AND 'MIENDLY" 1NSeM IN YOVR YARD. Aflmel bildi by providing into ODver and food daoughuut Ilse year. SpIders, tadyirugc, liceMnix avid mani1scS all cal pest Insech. Leryrrl se reeopire and te:poot Ihoo ilisoclr. You can even ptacllaia Alld fcleaso them onto your Jai0. CARls FOR YOUR PLAN'iS — AND YOUR ROIL fitiil(lly f4011 InoonS healthier plants that will requife, lees pctticide, fcrlilirar, %shot uid walk. Locally ndayled plants etc mole scaishml to Inoat pcstt and discnses. Good Saatlallon (wctding), row oovef I'macning, crap rolaliva A)ld mulching ally dialinalc lit! MCI forperticides nitogatllor. DON'T 40VRRsPRAYa P1ST1culn on Apply Ihese cliemicalS only as directed oil the Iabol and NEVER spray alorc than directed. TII S FOIL $31MWALK AND MUMMY Wel-r Ib-41 runs off your driveway rind Side%vrtk asnn[ly nuns down the gutter, dirultgk thr rrvnihur nicral griring rM inn, a alert" drain. eS14ILn drnfne�"e nor senors: Ilic woICr Ihty curry ;snot honied before ticiIllr Jiseliarrcd iato a 1okc, ivetland, Sheep? or Puget Sovad. fixeors Olt, gssofine os anything dar you wash cif yont diNni;ly or polte faro a gnttcr at shine drain gore dirttlIy - xrtrrrr+rerl • into lire ualurul tvatcr Cycle, It9(.'VCLE YOUR USED A10TOR OIL AND ANTIATFEZB Take it to yow lvml giS slntion. Avoid oil dniininy leca`it%t:lzs that use "olzm6ants" atelt as intvdost or colhfler. TlicteIstin way laiceyoleor51felydSposc of dla oil ease tI hAs been absorbed. Glom up spillrJ 1141-Ilceze and DON'T Iesvo It ailing arrttnQ open, it nnella said tatms meet to ch;ljmn. hourehold Pell and ollser sldntali teed is dtadly tf 11.04LOt& Call 1-300-Rr-CYCLE for more Information llboul recycling. FIX VAT LEAKY CRANXCA.4R OR TRANSMISSION fr repsir fa not porsibiv, pot a drip tray under else our nlld reoycic flit collated fluids. SWEEP YOUR WALX9 AM) DIU.VEWAY eta WonnS and gudcn hoses Just wash die Uttar and dirt into the g4ler curd Ihcn into your sliminx. IMN' YOUR EXHAUST CLEAN Tumatps red Aoli•pallutiori dales" not only kelp to keep 010 air clean Ihcy reduce Ille fallout hum your ealtau%; %%iliell Is picked up * tuilO nil oluceia and palkiny tots, DZ-10E W17lI RAND On ClNDLRB Rutioll'canks dc•rcinc colts end dioml cat Into yottr atromto Arid rivers. Swap up aura} or ctadmi hafore the ncxr rnlncivirn or they twill catricymbleula ortllclr otvn. KEEP SUDS Out, OF 71M GUTTERS Use low phoapllata aonph or etianlughuaxing conmpundi when yoo waali your ten. Try to direct iho cadet auto your lawn instead or into else gntier. WoshiOg your oar on die Revel nduuts Nit nud for tmtn watering td Ilte vino allic. TIV3 FOR LOT COY.ERAOS fl A41%g berriet, rondir and stores rpeant jetne llty vitV11111ua :uld Paving large rrcm Ale too pave and serif mta+e outs► mom land, we Allow iria nod this We to inftllmle Illy soil oud roobnrga groandwaior ;titpplics. This Intlltrsliuu through tic ground dears Iho tvVru (us an extent) sad feeds vntirlground wiler flows - roviru; -willed %algrly our dlillkirlg water wed keep XF&II i3 Hotting during dteSulnraer. PLANT ANOMER TRES Trace nnJ slnubS aVium uid hotd slut of of t before 11 nacino Ste grotidtl. Wltoratcr poeafble, keep Ills mionil, exfithlg aces sail r5robt sled pistil mots•. AVOID PAVING YOUR LOT Leave es muoh or year lot no you rin ;n netarsl vcpclatioa grid leers • evtal fawns loc[elr.,e the stxlvral rultoff ore. ryou most pave, mticldcr using she new modulurirphalts, Watcr seeps iluauor Ilival AGC11AR17E GROIINDIYJ►17;1( SUPPLIES - INSTEAD OF STORM DRAINS Cdttok 9115 Approvod drsdnago phin (be your let. If you me not tcq 1kcd to direct your tool's Zwnspoutt dilccity into die Storm drain system, lien rtdkeot I6em ItWAY Aran stswvl, gultsn and shorn drhhss. Fru1cTl drtdns, ohandttised srpllc Gcldr or aisle mS %rill all hold and dmAy ycicnsc ureter into the ground MY17 Ihtr alrDairf oat br danc fjftvar owltriabta fllrtttrh lroler aurtrb frs or your fort w )wu ar loan, x,lrhbau error r+limupt>'c rich.. DON'T STRIP AWAY GROUND COVER Unprotected dirt will wash off your lot and fill catch nx.;++., pipes and etrsainbedt with aediincuts. Control etuYlpu with jute tnallilig, straw, k;Iy baler, etc. AVOID r.ARDSCAVING PLASTIC AND Ube DARK 1VISELY Landfceptng pinrtic orcatas just ss tavv6 runoff as rlrects as ovrloeolo and bark uroaler iddiltonal pioblems. pork ologA op ervrrll drsrns, loweril lha pN or streomwnicr anti breaks dawn into fibara whlcli linrin Ilth gills. IIto-veer, since landacaping Lark is usually n predtict. of rcoyuling, wo do artaoutapt Its' proper rise (without plastlo)t tj don't spray Ohe.nlicala on or imlind bark; 21 don't utie bark on atacp x1onoe; 3) surround bark With 2 barrier auoh its lawn adging; 4) keep balk asvny frota stroamr, drive%rays And street pulitri. TALI[. TO YOUR t:1111.T)11CN 7cuol, shoot to vnluc ono rospoct ntsaoma and woll:%nds and ihrir inbabl%anta. Kids nsrd to updorstand lbill they esuac hnrla if lboy build dens, alit vp bollolu laud. tPample3 hanks had plartls or Is;irasa fish and w;1Jl;fa. PENCE LIVI35T0(!9 AND LABCTi PETS AWAY FROM STREAMS AND NVETUANDS Animal wastes dograde water gila lly sad their hoovet cause straAmbrinks to cvlinpsa, lending to heavy e;ll■tioa and dliroplian of fish Itntrit;L1. Sues LITTER OUT OF STREAMS At WETLANDS This includes litait.q clippings and otls++r yard wade "S wall as trash noel Inorganic wistes, TLIs sort of ao"InRtinat;nll not only laoka and smells awful, bat It reducer the oxygen content of flte %rarcl and kills fish and o;hcr wildlife and Ilicir eggs, ]DON'T RtNtOVE LARGE ORGANIC DXBRIS SUCII AS TREE STU6111Y AND 11RANCHUS P11.0M TUS STftCAM OR WETLAPID This provides valnablc haWrol a[id food aohrors rur wellsnd wildlife. CONTACT TILE STATE DEPARTMENT Oi: PISHERIES AND WILDLIFE FOR ADVICE AND APPROVAL Allilouglr well iutcntioned, any changes you mike to the stream or reLlatid could dcrtruy spawning bads and fish eggs (even way duwtlltrearo) or blook fish miyrstlon. State fan' rc llfres naftr9l,rif front there anerlclrr for env c A rester( is a arrgtant, 1z W W cn ■ Q r, . 4 F y Ll,G t - ❑ ❑ ❑ ❑ El I O c0 U .� U C ^ N O M A 0 El 0 El m d GL C °U roU O .❑ LYi I H tq O C w ca C V -0 y •rJ ti •O 0000 C C T 4 bbo N ro 00 'D U 004 > y [ a ti cv N x rL= A. T y C G1 .b oo -o S w •� _fn 13 . •. vi AG � >Cc ` cl U U U a W Q !x o O u a❑❑ El El ❑ O QU x.7 •' +.a IS, �' •C .ra w o o� o a m V � Cp lei OD i�i cG0 ;Q dQ z AcG o 0 •o C', 00 O bA O i '� •�-+ 0 4 •S c C -E. UGLY b e9 4 acid o, G b. w CC u c ~O C C ctl cy O �% Q U 7 'dcn C M LIP�. O CD11 in O UC'4 00 L. . C M N C 3 U a�w o� 4. mb 3 3 T �Uy to •N o _' U i•J C W m V 0 •y° U T E •cJ 3 C C cr U U U U •❑ 6 QO C z Q .� •yr'..O L. p A 'b h R O Q C O - U �J O _ C rD C •� C C. C 8'O U _z c o m n. >, c� C O b0 a ❑ O E-� z 7 G[ C �[ O C� C a V,-j ,❑�o� ❑ O 80 h U a81 �. o 0 4 U U� � c- y p 3 N O W cc C 0 7 UC� 0 C C U v O3 ;,,� v�EL c z c do o i W C V C M S c, C N 0002*L F� ®�ocd3— 0 a 7 > On N110 .G .�''. •��^y U ran 'o ❑ O ❑ N C U W z H T > 71 w U� qa V. ro� O w n n U v z 3,�3x ❑c❑�� O U U c3 cbcac-s C4 EXHIBIT A Legal Description, Roads, Hertage Woods That portion of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington, more particularly described as follows: Commencing at the center of said section 33, said point being a concrete monument with Brass cap and Bears North 01 °03'43" East, a distance of 2632.77 feet from the South Quarter corner (Monument in Case) of said Section 33; thence South 88023'41" East along the North line of the Southeast Quarter of said Section 33, a distance of 1183.23 feet to the Westerly margin of New Military Road; thence South 35022'32" West along said Westerly margin, being 50.00 feet at right angles thereto the centerline of said New Military Road South, a distance of 716.35 feet to the True Point of Beginning and the beginning of a curve to the Right tangent to said line having a radius of 25.00 feet and a central angle of 79003'13'; thence an are distance of 34.49 feet along said curve to a point of reverse curve to the Left from which the radius point bears South 24025'45" West, having a radius of 778.39 feet and a central angle of 10043'55"; thence an arc distance of 145.80 feet along said curve to a point of reverse curve to the Right from which the radius point bears North 13041'51" East, having a radius of 25.00 feet and a central angle of 78°28'43'; thence an arc distance of 34.24 feet along said curve to a point of reverse curve to the Left from which the radius point bears North 87049'26" West, having a radius of 350.00 feet and a central angle of 19030'17'; thence an arc distance of 119.15 feet along said curve ; thence North 17019'43" West tangent to said curve, a distance of 117.91 feet to the beginning of a curve to the Left tangent to said line having a radius of 300.00 feet and a central angle of 27031'28"; thence an arc distance of 144.12 feet along said curve to a point of reverse curve to the Right from which the radius point bears North 45"08'48" East, having a radius of 25.00 feet and a central angle of 70000'31 "; thence an arc distance of 30.55 feet along said curve to a point of reverse curve to the Left from which the radius point bears North 64050'41" West, having a radius of 200.00 feet and a central angle of 59018'39"; thence an arc distance of 207.03 feet along said curve ; thence North 34009'20" West tangent to said curve, a distance of 238.74 feet; thence South 53034'04" West, a distance of 50.04 feet; thence South 34°09'20" East, a distance of 236.76 feet to the beginning of a curve to the Right tangent to said line having a radius of 150.00 feet and a central angle of 50021'47"; thence an arc distance of 131.85 feet along said curve to a point of compound curvature having a radius of 25.00 and a central angle of 100038'19"; thence an arc distance of 43.91 feet to a point of reverse -curve to the Left from which the radius point bears South 26050'46" West, having a radius of 300.00 feet and a central angle of 25014'13"; thence an arc distance of 132.14 feet along said curve ; thence North 88023'27" West tangent to said curve, a distance of 52.81 feet to the beginning of a curve to the Right tangent to said line having a radius of 25.00 feet and a central angle of 81 °33'58"; thence an arc distance of 35.59 feet along said curve to a point of reverse curve to the Left from which the radius point bears South 83010'31" West, having a radius of 50.00 feet and a central angle of 163007'57'; thence an arc distance of 142.36 feet along said curve to a point of reverse curve to the Right from which the radius point bears North 79057'25" West, having a radius of 25.00 feet and a central angle of 81 °33'58'; thence an arc distance of 35.59 feet along said curve; thence North 88023'27" West tangent to said curve, a distance of 52.44 feet to the beginning of a curve to the Left tangent to said line having a radius of $00.00 feet and a central angle of 33056'58'; thence an arc distance of 177.76 feet along said curve to a point of reverse curve to the Right from which the radius point bears North 32020'25" West, having a radius of 25.00 feet and a central angle of 104048'15'; thence an arc distance of 45.73 feet along said curve to a point of reverse curve to the Left from which the radius point bears South 72027'50" West, having a radius of 50.00 feet and a central angle of 233024'11'; thence an arc distance of 203.69 feet to a point of reverse curve to the Right from which the radius point bears South 19003'39" West, having a radius of 25.00 feet and a central angle of 104048'15"; thence an arc distance of 45.73 feet along said curve to a point of reverse curve to the Left from which the radius point bears South 56008'06" East, having a radius of 300.00 feet and a central angle of 25028'30'; thence an are distance of 133.39 feet along said curve to a point on the curve; thence North 86039'24" East, a distance of 51.29 feet to the beginning of a curve to the Right from which the radius point bears South 79°13'08" East, having a radius of 250.00 feet and a central angle of 80°49'41'; thence along said curve, an arc distance of 352.68 feet; thence South 88023'27" East tangent to said curve, a distancq,, z.Z6'Q feet to the ���t � �pt•NlASf{j�; � 4F � •. C�STE� . `4� � S'In. C,4 s 2. A ram. r-1% beginning of a curve to the Right tangent to said line having a radius of 25.00 feet and a central angle of 90000'00' ; thence an arc distance of 39.27 feet along said curve ; thence South 01 036'33" West tangent to said curve, a distance of 124.75 feet to the beginning of a curve to the Right tangent to said line having a radius of 125.00 feet and a central angle of 43046'04"; thence an arc -distance of 95.49 feet along said curve to a point of compound curvature having a radius of 25.00 and a central angle of 70031'44'; thence an arc distance of 30.77 feet to a point of reverse curve to the Left from which the radius point bears South 25054'21" West, having a radius of 50.00 feet and a central angle of 250031'43'; thence an arc distance of 218.63 feet; thence North 45022'37" East tangent to said curve, a distance of 70.71 feet to the beginning of a curve to the Left tangent to said line having a radius of 175.00 feet and a central angle of 43046'04'; thence an arc distance of 133.68 feet along said curve; thence North 01 036'33" East tangent to said curve, a distance of 124.75 feet to the beginning of a curve to the Right tangent to said line having a radius of 25.00 feet and a central angle of 90000'00'; thence an arc distance of 39.27 feet along said curve; thence South 88023'27" East tangent to said curve, a distance of 77.00 feet to the beginning of a curve to the Right tangent to said line having a radius of 250.00 feet and a central angle of 71 °03'44'; thence an arc distance of 310.07 feet along said curve; thence South 17019'43" East tangent to said curve, a distance of 117.91 feet to the beginning of a curve to the Right tangent to said line having a radius of 300.00 feet and a central angle of 42034'58'; thence an arc distance of 222.96 feet along said curve; thence South 64044'45" East radial to said curve, a distance of 50.00 feet to the beginning of a curve to the Left, radial to said line, having a radius of 350.00 feet and a central angle of 6010'56"; thence along said curve an arc distance of 37.76 feet to a point of reverse curve to the Right from which the radius point bears South 70055'41" East, having a radius of 25.00 feet and a central angle of 85°06'49'; thence an arc distance of 37.14 feet along said curve to a point of compound curvature having a radius of 718.39 and a central angle of 8028'49'; thence an arc distance of 106.33 feet to a point of compound curvature having a radius of 25.00 and a central angle of 102°42'35'; thence an arc distance of 44.82 feet to a point on the curve; thence North 35022'32" East, a distance of 112.37 feet to the True Point of Beginning. Containing 3)-IG Acres, more or less. 3 0 z a V z H C W a E-+ z w w z d x a ^Q PLI Qi Qd 04 F Z. Ed 3 cd o al sr P4 44 m G O 0 �3 JJ4U .4 0 i.1 R y •y X y � u ro IJ d c td C) Q boy w g'3 a 0 ° a 9V"D u iC 0 c 0 v zi 4 ta Ck lC H L 0 Vl 43 Q id Q Vl S n 77 Y s.. � V) a �y O w U 5�aL xmw J � J cc G J L1 1 } so�r� Jzcc¢ O N Z m� m 0 i= z b .G n. Y CJ 3 Y C )L M 0 1 D [U In m ,•i W 00'Fi 031 100 SONO3M A1N(ID99 9#11, W 00:69:80 96i0-90N, EXHIBIT A Legal Description, Roads, Hertage Woods That portion of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington, more particularly described as follows: Commencing at the center of said section 33, said point being a concrete monument with Brass cap and Bears North 01 °03'43" East, a distance of 2632.77 feet from the South Quarter corner (Monument in Case) of said Section 33; thence South 88023'41" East along the North line of the Southeast Quarter of said Section 33, a distance of 1183.23 feet to the Westerly margin of New Military Road; thence South 35022'32" West along said Westerly margin, being 50.00 feet at right angles thereto the centerline of said New Military Road South, a distance of 716.35 feet to the True Point of Beginning and the beginning of a curve to the Right tangent to said line having a radius of 25.00 feet and a central angle of 79003'13"; thence an arc distance of 34.49 feet along said curve to a point of reverse curve to the Left from which the radius point bears South 24025'45" West, having a radius of 778.39 feet and a central angle of 10*43'55'; thence an arc distance of 145.80 feet along said curve to a point of reverse curve to the Right from which the radius point bears North 13041'51" East, having a radius of 25.00 feet and a central angle of 78028'43'; thence an arc distance of 34.24 feet along said curve to a point of reverse curve to the Left from which the radius point bears North 87049'26" West, having a radius of 350.00 feet and a central angle of 19030'17'; thence an arc distance of 119.15 feet along said curve ; thence North 17019'43" West tangent to said curve, a distance of 117.91 feet to the beginning of a curve to the Left tangent to said line having a radius of 300.00 feet and a central angle of 27031'28"; thence an arc distance of 144.12 feet along said curve to a point of reverse curve to the Right from which the radius point bears North 45008'48" East, having a radius of 25.00 feet and a central angle of 70000'31'; thence an arc distance of 30.55 feet along said curve to a point of reverse curve to the Left from which the radius point bears North 64050'41" West, having a radius of 200.00 feet and a central angle of 59018'39"; thence an arc distance of 207.03 feet along said curve ; thence North 34009'20" West tangent to said curve, a distance of 238.74 feet; thence South 53034'04" West, a distance of 50.04 feet; thence South 34009'20" East, a distance of 236.76 feet to the beginning of a curve to the Right tangent to said line having a radius of 150.00 feet and a central angle of 50021'47"; thence an arc distance of 131.85 feet along said curve to a point of compound curvature having a radius of 25.00 and a central angle of 100038'19"; thence an arc distance of 43.91 feet to a point of reverse -curve to the Left from which the radius point bears South 26050'46" West, having a radius of 300.00 feet and a central angle of 25014'13"; thence an arc distance of 132.14 feet along said curve ; thence North 88023'27" West tangent to said curve, a distance of 52.81 feet to the beginning of a curve to the Right tangent to said line having a radius of 25.00 feet and a central angle of 81 °33'58"; thence an arc distance of 35.59 feet along said curve to a point of reverse curve to the Left from which the radius point bears South 83010'31" West, having a radius of 50.00 feet and a central angle of 163°07'57"; thence an arc distance of 142.36 feet along said curve to a point of reverse curve to the Right from which the radius point bears North 79°57'25" West, having a radius of 25.00 feet and a central angle of 81 °33'58'; thence an arc distance of 35.59 feet along said curve; thence North 88023'27" West tangent to said curve, a distance of 52.44 feet to the beginning of a curve to the Left tangent to said line having a radius of 300.00 feet and a central angle of 33056'58'; thence an arc distance of 177.76 feet along said curve to a point of reverse curve to the Right from which the radius point bears North 32020'25" West, having a radius of 25.00 feet and a central angle of 104048'15"; thence an arc distance of 45.73 feet along said curve to a point of reverse curve to the Left from which the radius point bears South 72027'50" West, having a radius of 50.00 feet and a central angle of 233024'11"; thence an arc distance of 203.69 feet to a point of reverse curve to the Right from which the radius point bears South 19003'39" West, having a radius of 25.00 feet and a central angle of 104048'15'; thence an arc distance of 45.73 feet along said curve to a point of reverse curve to the Left from which the radius point bears South 56008'06" East, having a radius of 300.00 feet and a central angle of 25028'30'; thence an arc distance of 133.39 feet along said curve to a point on the curve; thence North 86039'24" East, a distance of 51.29 feet to the beginning of a curve to the Right from which the radius point bears South 79013'08" East, having a radius of 250.00 feet and a central angle of 80049'41 "; thence along said curve, an arc distance of 352.68 feet; thence South 88023'27" East tangent to said curve, a distanc3 feet to the i � ' Q i s� • GISTfR��•'�, r beginning of a curve to the Right tangent to said line having a radius of 25.00 feet and a central angle of 90°00'00"; thence an arc distance of 39.27 feet along said curve ; thence South 01 036'33" West tangent to said curve, a distance of 124.75 feet to the beginning of a curve to the Right tangent to said line having a radius of 125.00 feet and a central angle of 43046'04"; thence an arc -distance of 95.49 feet along said curve to a point of compound curvature having a radius of 25.00 and a central angle of 70031'44'; thence an arc distance of 30.77 feet to a point of reverse curve to the Left from which the radius point bears South 25054'21" West, having a radius of 50.00 feet and a central angle of 250031'43'; thence an arc distance of 218.63 feet; thence North 45°22'37" East tangent to said curve, a distance of 70.71 feet to the beginning of a curve to the Left tangent to said line having a radius of 175.00 feet and a central angle of 43046'04'; thence an arc distance of 133.68 feet along said curve; thence North 01 036'33" East tangent to said curve, a distance of 124.75 feet to the beginning of a curve to the Right tangent to said line having a radius of 25.00 feet and a central angle of 90000,00"; thence an arc distance of 39.27 feet along said curve ; thence South 88023'27" East tangent to said curve, a distance of 77.00 feet to the beginning of a curve to the Right tangent to said line having a radius of 250.00 feet and a central angle of 71 °03'44'; thence an arc distance of 310.07 feet along said curve; thence South 17019'43" East tangent to said curve, a distance of 117.91 feet to the beginning of a curve to the Right tangent to said line having a radius of 300.00 feet and a central angle of 42034'58'; thence an arc distance of 222.96 feet along said curve; thence South 64044'45" East radial to said curve, a distance of 50.00 feet to the beginning of a curve to the Left, radial to said line, having a radius of 350.00 feet and a central angle of 6010'56'; thence along said curve an arc distance of 37.76 feet to a point of reverse curve to the Right from which the radius point bears South 70055'41" East, having a radius of 25.00 feet and a central angle of 85006'49'; thence an arc distance of 37.14 feet along said curve to a point of compound curvature having a radius of 718.39 and a central angle of 8028'49'; thence an arc distance of 106.33 feet to a point of compound curvature having a radius of 25.00 and a central angle of 102042'35'; thence an arc distance of 44.82 feet to a point on the curve; thence North 35022'32" East, a distance of 112.37 feet to the True Point of Beginning. Containing 3.1G Acres, more or less. 3 eOFi 33530 1ST WAY SOUTH December 24, 1998 Mr. Dennis Alfredson, P.E. Schneider Homes, Inc. 6510 Southcenter Blvd, Suite #1 Tukwila, WA 98188 (206) 661-4000 FEDERAL WAY, WA 98003-6210 oG � V Re: HERITAGE WOODS DIVISION No. 2, FINAL PLAT — City File No. SUB98-0003 Dear Mr. Alfredson: This letter is in response to you letters of December 11, 14, and 15, 1998. I direct you to relevant sections of Mr. Harris's October 2, 1992, letter which lists Preliminary Plat Approval -and SEPA Conditions, and staff responses to those conditions. These approval conditions are ones with which you should have been familiar with. SEPA Condition 4.c states, in pertinent part, that: All required wetland mitigation improvements, except monitoring, shall be completed and accepted by the director of Community Development Services prior to submitting the final plat for approval. Wetland mitigation improvements can not be accepted until their success and viability can be assessed. While we sympathize with your wetland consultant's injury, the fact remains that no wetland report was prepared for the spring, and no wetland report was received by the city until October 25, 1998, 86 days after your submittal for Final Plat approval. Schneider Homes was well aware of the fact that the wetland monitoring was a critical element of the approval process. While your letter of 12/11 states that, no direction is found in this letter (Harris 10/2/98) which requires physical corrections of the wetland deficiencies, it is impossible to note wetland deficiencies without some sort of monitoring report. No Spring 1998 Report was submitted, as required. It was not until the Fall 1998 report was submitted that we were able to assess the wetland functional successes and failures. It is true that in December 1997, Parklane was given direction to correct certain deficiencies. However, as a purchaser of the land and associated plat, you assumed Parklane's responsibilities relating to Preliminary Plat and SEPA Conditions. If the Spring 1998 Wetland Monitoring Report had been done, as required and requested, any wetland deficiencies could have then been addressed, prior to your submittal for Final Plat approval. Mr. Dennis Alfredson December 24, 1998 Page 2 The requirements of the Federal Way City Code (FWCC) relating to final plat approval state that: Prior to approval of the final plat, all surveying and monumentation must be complete. In addition, all other required improvements must be substantially -completed with remaining uncompleted improvements consisting only of sidewalks, street lighting, landscaping where applicable, or similar improvements, as determined solely by the departments of community development services and public works (FWCC Sec. 20- 135(a), emphasis added). It is the city's position that substantially complete means substantial compliance with the Conditions of Preliminary Plat approval and all SEPA environmental threshold determination Conditions. As stated previously, as a condition of SEPA, all wetland mitigation improvements must be completed and accepted prior to submitting the final plat for final approval. Non- functioning wetlands do not comply with the SEPA condition regarding wetland mitigation. Until the wetland mitigation component of SEPA is complied with, the Heritage Woods Division No. 2 is not ready for final plat approval. At our meeting of December 11, 1998, you agreed to prepare solutions and alternatives to remedy the wetland problems. We have not yet received alternatives or solutions for review. When we receive the revised wetland plans, they will be reviewed as expeditiously as possible, with our wetland consultant working directly with yours. Please contact me at (253) 661.4106 if you have questions. Sincerely, G ego Moore, AICP Direct f Community Development Services c: Greg Fewins, Principal Planner David Graves, Contract Planner File L:\PRMSYS\DOCUMEN[lSUB98 00.03\PL122498, DOC December 1, 1998 Mr. Greg Fewins Cityof Federal Way A1�OLF S,N Y ASSOCIATES, INC. Department of Community Development Services 33530 First Way South Federal Way, Washington 98003-6210 RE: REVIEW OF 1998 AUTUMN 1998 MONITORING REPORT FOR HERITAGE WOODS Dear Mr. Fewins: At your request Adolfson -Associates, Inc. (AAI) has reviewed the Autumn 1998 Monitoring Report for the Heritage Woods mitigation project, prepared by Kucinski Consulting Services, Inc. on October 25, 1998 (hereafter referred to as the "1998 Report"). The findings in this report were compared with previous reports and previous documented communications between AAI and the City of Federal Way. Additionally, Lizzie Zemke and I conducted a site visit to verify findings described in the 1998 Report. As you discussed with Lizzie during a phone conversation on November 30, 1998, there are quite a few problems associated with this mitigation project. It is our understanding that the City wishes to resolve these issues as soon: as possible in order to set the project on a track toward success. Therefore, the following letter includes 1) a review of the 1998 Monitoring Report, 2) our observations and discussion of probable causes of the current failure, and 3) our recommendations for further action. Wetland Creation Areas Wetland Creation Area 1: According to the 1998 Report, an agreement was reached wherein Wetland Creation Area 1 is to be considered upland buffer, not wetland. AAI concurs with the observation that this area does not have adequate water to support wetland conditions. This area should not be included as wetland creation, but as buffer enhancement. The 1998 Report recommends that blackberries, Scot's broom, and reed canarygrass be removed from the area and the deceased fir trees should be replaced. We agree that invasive species should be removed, However, we suggest that 6 big leaf maple, rather than 6 fir trees, be planted in this area. Please note that the invasive species should be removed manually to prevent destruction of the planted species. Wetland Creation Area 4: This area appears to be well vegetated and there are no maintenance recommendations at this time. However the 1998 Report as well as previous documentation indicate that wetland hydrology may not be present. We recommend that an investigation be conducted to determine if wetland hydrologic conditions exist in this area. If in fact wetland conditions are not present, this area should not be calculated as wetland creation area, but as buffer enhancement. . RECEIVEp gy COMMUNi''Y DEVELOPW N- 0-zUIRTtu1SAT DEC - 3 1999 Environmental Analysis 5309 Shilshole Ave. NW Seattle, WA 98107 adolfson@adolfson.com (206) 789-9658 FAX (206) 789-9684 �� Wetland Creation Area 5: The mitigation plan indicates that this area should cover 3,000 square feet; however, the as -built documentation indicates that it is 8,498 square feet in size. This creation area is larger to mitigate for unforeseen destruction of Wetland E during construction. The 1998 Report indicates that hydrology may be insufficient to support wetland vegetation.. During our November site visit, we did not observe wetland conditions. An investigation should be conducted to determine how much of this area is actually wetland. The recommended plantings of cedar, Scouler's willow, lady ferns and Oregon ash should be installed only if adequate water is determined to exist. Wetland Creation Area DEA-A: The mitigation plan indicates that this area should cover 3,525 square feet; however, the as -built report indicates that this area was surveyed at 2,744 square feet. The 1998 Report as well as our field observations found wetland hydrology to be lacking in this area also. An investigation should be conducted to determine how much of this area is actually wetland. The recommended plantings of cedar, Scouler's willow, lady fern and Oregon ash should be installed only if adequate water is determined to exist. A number of plastic pots were left near this wetland area, possibly during installation of the plant materials. These pots and other garbage should be removed. Wetland Creation Area 7: As indicated in the 1998 Report, this area is functioning well as a wetland and has adequate hydrology to maintain wetland conditions. However, the calculations of the size of this wetland creation area are conflicting. The mitigation plan states that this area should be 1,475 square feet in size. The as -built survey shows this area at 95 square feet whereas the as -built report documents this area at 552.5 square feet. Additionally, there is question as to how much of this area is wetland creation and how much is actually plantings within existing Wetland F. If possible, the true area of creation should be determined in order to determine the amount of credit that should be given for creation versus enhancement. The 1998 Report recommends removal of soft rush in this area. We feel however, that the small amount of soft rush currently growing in this area is not threatening the diversity of the wetland and should not necessarily be, removed. Plastic pots were also left near this wetland area and should be removed. Wetland Creation Area 8: The mitigation plan indicates that Wetland Area 8 should be a 4,375 square foot area adjacent to the pond. However, the as -built report shows that this area is 7,711 square feet in size. Our January 3, 1997 review of the as -built report questioned whether Creation Area 8 extends into the pond beyond the bermed area. If this area overlaps the pond, wetland creation credit can not be given for the overlapped area as the pond already counts for mitigation credit. This issue should be resolved through an on -site investigation. Additionally, although this site appears to have adequate water, it is populated by a mono -culture of cottonwoods. Rather than removing the soft rush, as recommended in the 1998 Report, we suggest that the cottonwoods be thinned and additional species be planted to provide diversity in this small wetland community. 2 Buffer Enhancement Areas Buffer Enhancement Area I: We concur with the 1998 Report recommendation to replace all dead planted individuals and weed the red alder recruits to reduce competition. Buffer Enhancement Area Il: As the 1998 Report states, the plantings in this area are not successful. It appears that use of this area as either a pedestrian or bike trail has destroyed the majority of the plantings. The dead plants should be replaced. We suggest that at least 6 Douglas fir and 6 big leaf maple be planted as substitutes for the hemlock. The deceased sword ferns and snowberry should also be replaced. As the 1998 Report recommends, the red elderberry should be replaced with salal because it may be better adapted to the conditions in this area. Additionally, Scot's broom is invading this area and should be removed. A barrier or sign should be erected to prevent use of this buffer area as a trail. Buffer Enhancement Area III: We agree with the 1998 Report recommendations to replace all dead conifers with equal numbers of the same species, replace dead red elderberry with salal, replace dead snowberry plants with equal numbers of the same species, remove some of the red alders to reduce competition, and to irrigate to ensure plant survival. Buffer Enhancement Area IV: We concur with the recommendations to replace dead or missing individuals with equal numbers of the same species, however, we suggest replacing the cedar with big leaf maple because maple may be better suited to the conditions in this area. The red elderberry should be replaced with salal, some of the red alder saplings should be removed and the area should be irrigated. Buffer Enhancement Area V: The 1998 Report, refers to Buffer Area V as the area north and west of the storm water detention pond. However, the Mitigation Plan indicates that Buffer Area V is located along the western boundary of the mitigation site, just below lots 57 and 58. We found this buffer area to be at the base of a very steep slope that has eroded substantially, causing the planting area to, be partially buried. We suggest replanting all of the deceased plants in this buffer area and installing a silt fence or erosion control material at the top of the buffer area to prevent further problems. Detention Pond Buffer Restoration: This is the area, which is referred to in the 1998 Report as Buffer Enhancement Area V. As the report states, many of the trees in this area have died. All the deceased trees should be replaced and the planting area should be irrigated. 3 Recommendations for Further Action In addition to the replanting, irrigation, and weed management actions recommended above, we suggest the following additional actions be taken in order to achieve the original intent of the mitigation plan. If possible, the exact boundaries of the created wetlands should be delineated. A civil survey should then be completed to determine the exact size of each created wetland because the actual amount of created wetland is currently unknown. Specifically, the areas that should be delineated are Creation Areas 4 and 5, and DEA-A, as well as Creation Areas 7 and 8. Once an accurate calculation has been obtained for how much wetland has already been successfully created, a revised mitigation plan addressing the remaining wetland acreage to be created can then be drafted. The majority of the unsuccessful wetland creation efforts on the site appear to be due at least in part to an inadequate supply of water. Therefore, additional on -site wetland creation may be difficult. We suggest a meeting at the site with City staff, the developer's wetland consultant, and AAI staff to discuss other wetland mitigation options. Please call Lizzie Zemke or me at (206) 789-9658 if you have any questions. We very much appreciate the opportunity to assist the City with this project. Sincerely, ADOLFSON ASSOCIATES, INC. Marja J. Preston Staff Scientist 4 MEMORANDUM ADOLFSON TO: Jim Harris, Senior Planner, City of Federal Way ASSOCIATES, INC. FROM: Keith Fabing, Wetland Biologist, Adolfson Associates, Inc. DATE: October 20, 1995 RE: Final Heritage Woods Wetland Creation and Buffer Enhancement Plan Review JOB NO.: 9595-38 The purpose of this memo is to -provide comments on the revised final Wetland Creation and Buffer Enl)ancenient Plan:11erita'age Woods, Federal Way_ Washington (hereafter referred to as the "Mitigation Report") prepared for Park Lane Ventures, Inc. by del Moral and Associates, dated October 16, 1995. These comments are based on a review of the revised final plan that addresses your comments submitted in a letter to David Morrison of Parklane Ventures on October 13, 1995. This letter requested specific information which is required for the plan to meet the minimum mitigation plan requirements as stated in Section 22-1358 of the Federal Way City Code. Action was taken on the majority of the comments by the applicant. The following is a list of the information requested in the October 13, 1995 letter (described in bold), a summary of how each item was addressed in the revised final mitigation report (described in normal type), and items which require further action (described in italics). 1) Please provide a legend on the Sheet W1 of the Site Plan which differentiates between existing and finish grade contours, and calls out all site plan symbols not included in the "Landscape Schedule" legend on Sheet W2. A legend was provided on the Sheet Wl of the site plan. No further action is required. 2) Please provide cross-section details for Wetland Creation Area 5 and DEA- A. Cross-section details for Wetland Creation Area 5 and DEA-A were depicted on Sheet W3 Of the Site Plan. No further action is required. Environmental Analysis 5309 Shilshole Ave. NW, Seattle, WA 98107 Phone (206).789-9658 Fax(206) 789-9684 �Ok Jim Harris, City of Federal Way October 20, 1995 Page 2 3) Please incorporate estimated 6-month peak flows in the "Hydrologic Discussion" section of the Mitigation Plan. Estimated 6-month peak flows were included in the "Hydrologic Discussion" section of the revised final Mitigation Report. No further action is required. 4) In the "Site Topography Before and After Construction" section of the report, please add the following note: "Mr. Jaeger will be present during the grading and construction of the meandering swales to direct specific location and depth for optimal hydraulic distribution." This statement was included in the "Site Topography Before and After Construction" section of the revised final Mitigation Plan. No further action is required: 5) A note to add composted or other biosolids/organic soil to the surface of all wetland creation areas to a depth of at least three inches was included under the "Planting Notes" section of the Mitigation Report. Please provide for 25 to 30 percent compost on a volume basis. A statement to provide for 25 to 30 percent compost on a volume basis was provided in the "Planting Notes" section of the revised final Mitigation Report. No further action is required. 6) It was agreed upon in a meeting with James Jaeger of Jaeger Engineering on October 9, 1995 that, as a contingency, additional hydrologic support could be provided from the storm drain adjacent to Wetland Creation Area 4. Please include a discussion of this contingency plan for Wetland Creation Area 4 under the "Hydrologic Discussion" section of the Mitigation Report. A discussion of the contingency plan agreed in a meeting with James Jaeger of Jaeger Engineering on October 9, 1995 for Wetland Creation Area 4 was included under the "Contingencies" section of the revised final .Mitigation Report. No further action is required. Jim Harris; City of Federal Way October R 1995 Page 3 ') Similar to Item 6 above, include a discussion of the agreed upon revised contingency plan for Wetland Creation Area 5 under the "Hydrologic Support" section. The revised final Mitigation Report states under the "Area 5" subsection of the "Hydrologic Discussion" section that "the primary contingency measure is to redirect collected storm drain water from Military Road to this area. " This concept is described in paragraph 12 of the "Contingencies" section and paragraph 3 of the "Hydrological Patterns" section. It was agreed upon in a meeting with Mr. James Jaeger of Jaeger Engineering on October 9, 1995 that, as a contingency, additional hydrologic support could be provided from the storm drain adjacent to Wetland Creation Area 5, and not from Military Road. Mr. Jaeger contacted Adolfson Associates, Inc. on October 20 stating that he had contacted the parties responsible for the proposed Military Road Improvements Project. Mr. Jaeger stated that he had discussed the proposed contingency plan utilizing an oil/water separator and a biofiltration swale within the Military Road right-of-way, that the above referenced parties had agreed that this plan could be implemented. Confirm that the proposed contingency plan for Wetland Creation Areas 5 and DEA A as described in the "Area 5 " subsection of the "Hydrology Discussion " section has been adequately coordinated with the parties responsible for the proposed Military Road Improvements Project. 8) Please delete paragraph 2 of the "Biofiltration Swales and Other Biofiltration Features" subsection on Page 14. Paragraph 2 of the "Biofiltration Swales and Other Biofiltration Features" subsection was deleted. No further action is required. 9) Include discussion about the use of quarry spalls where the sewer maintenance road crosses Wetland D. A note describing this is included in the site plan. The above referenced discussion was included in the "Wetland Enhancement Site" subsection of the "Restoration" section of the revised final Mitigation Report. No further action is required. Jim Harris, City of Federal Way October 20, 1995 Page 4 10) Revise Table 1 and the note below the table to include Wetland L. Total wetland replacement area needed is 34,631 square feet. Also include Buffer Area E (0.06 acre, 1:1 ratio) in the table. Table 1 was revised to include "Wetland L" under "Total Wetland Replacement Area Needed" in the revised final Mitigation Report. Table 1 also has been revised to include "Buffer Area E. " No further action is required. 11) Table 2 needs several revisions as follows: - Total for PSS is 9,000 (2,000 + 475 + 3,525 + 3,000). - Plan shows 7,750 square feet for Area 4. Table shows 7,350 square feet. - Total for PFO is 10,450 square feet (7,750 + 2,700). - Add new line for Pond Mitigation Credit, 11,806 square feet. - Total should match 34,631 square feet. - Check all math. Table 2 was revised to reflect the above referenced figures in the revised final Mitigation Report. No further action is required. 12) Add discussion in the report to be consistent with Item 11 above regarding the 11,806 square foot credit for pond mitigation. This discussion should be in the report in the following locations: last paragraph of the "Preface"; paragraph 2 of the "General Planting Concept" section; - paragraph 1 of the "Mitigation Goals" section; and paragraph 1 of the "Summary" section. The "Preface," General Planting Concept," Mitigation Goals" and "Summary" sections of the revised final Mitigation Report were revised to reflect the above referenced credit for pond mitigation. No further action is required. Jim Harris, City of Federal Way October 20, 1995 Page 5 13) A 12-inch berm has been incorporated into the Wetland Creation Area 8 design and is depicted on the cross-section detail. Revise the berm discussion in "Area 8" subsection of the "Hydrologic Discussion" section to reflect the design as described in the cross-section on Sheet W3 of the Site Plan. The revised final Mitigation Report states in "Area 8" subsection of the "Hydrologic Discussion" section that "the berm across the opening will be maintained at 12 inches below the normal water level of the pond. " The cross section depicts that the berm will be positioned above the normal water level. Revise the berm discussion in "Area 8" subsection of the "Hydrologic Discussion" section to reflect the design as described in the cross-section -on Sheet W3 of the Site Plan. 14) Final approval of all aspects of the Wetland Creation and Buffer En ancement Plan: Heritage Woods, Federal 3Yay_,_Washingtor is subject to review of the Final Wetland Mitigation Site Plan, the Final WetlandMitigation Reporting Plan, and the final design document. Please do not state that the plan has been "accepted" or "approved" by the City of Federal Way. Appropriate changes were incorporated into the "Preface" and "Introduction - Project Description" sections of the revised final Mitigation Report. No further action is required. 15) Figure 1--"Wetland Map form David Evans & Associates" was referenced in the "Location and Sizes of Existing Wetlands" section. Figure 1 was not included in the final Mitigation Report. Figure 1 was included in the revised final Mitigation Report. No further action is required. 16) The last paragraph of the "Preface" section does not include the "Pond End Wetland Creation Area" as one of the wetland creation areas deleted from the final Mitigation Report. Include "Pond End Wetland Creation Area" at the end of the "Preface" section. "Pond End Wetland Creation Area" was included at the end of the "Preface" section of the revised final Mitigation Report. No further action is required. Jim Harris, City of Federal Way October 20, 1995 Page 6 1) Paragraph 2 of the "Introduction --Project Description" section describes "wetland creation required to offset the unavoidable impacts due to construction of the drainage systems." Please also include a reference to the unavoidable impacts to "Wetland A" and "Wetland L" in this section. A reference to the unavoidable impacts to "Wetland A" and "Wetland L" was included in the "Introduction --Project Description" section of the revised final Mitigation Report. No further action is required. 18) Include a description of "Wetland A" in the "Locations and Sizes of Existing Wetlands" section. For those wetlands that will be impacted, describe the impact for each wetland in their respective descriptions. A description of "Wetland A" was included in the "Locations and Sizes of Existing Wetlands" section of the revised final Mitigation Report. No further action is required. 19) Please include areas (square feet) for each buffer restoration in the Site Plan. The Site Plan was revised to include areas for each buffer restoration area as described in Table 3 of the revised final Mitigation Report., No further action is required. 20) Describe specifically how "Wetland L" will be impacted. Will it be filled or not? Coordinate with Barbara Simpson of the Parks Department. The revised final Mitigation Report states that "Wetland L" will be filled. Confirm that this decision was coordinated with Barbara Simpson of the Parks Department., 21) In paragraph 2 of the "Hydrological Patterns" section, it is stated that "the creation area is immediately adjacent to, or below a proven water source." Please revise this statement to state "below a seasonal water source." The above referenced sentence in the "Hydrological Patterns" section was revised in the revised final Mitigation Report No further action is required. Jun Harris, City of Federal Way October 20, 1995 Page 7 22) Provide a description of "Buffer II" in the "Buffer Restoration Sites" subsection. A description of "Buffer II" in the "Buffer Restoration Sites" subsection was provided in the revised final Mitigation Report. No further action is required. 23) In the "Performance Standards" section, it states that "wetlands shall be established on an area of about 18,000 sq. ft. of existing wetland." Wetland Creation Areas will be created outside of delineated wetland boundaries. Please revise this statement appropriately. Item 5 of the "Performance Standards" section was revised to state that wetlands "shall be established on an area of 22, 825 - sq. ft. outside delineated wetland boundaries" in- the revised final Mitigation Report. No further action is required. 24) Delete "Area 2" from paragraph 3 of the "Monitoring Plan" section. Include provisions for monitoring emergent and aquatic vegetation, wildlife, amphibians, sedimentation rates, and water level fluctuations (utilizing staff and crest gauges) for the pond area. In paragraph 3 of the "Monitoring Plan" section, "Area 6" is included in areas where sample plots will be established. Wetland Creation "Area 6" has been deleted from the Mitigation Report and the Site Plan. Delete "Area 6" from paragraph 3 of the "Monitoring Plan" section. Revise the "total of 13 plots" statement to state "total of 8 plots. " Paragraph 13 of the "Monitoring Plan" section states that "the water level of the pond will be monitored quarterly using a water level staff located near the west end of the pond near the control weir. " It also states that sedimentation will be monitored "by checking the sump in the Type H catch basin at the pond inlet pipe. " Utilize both staff and crest gauges for hydrologic monitoring. Include a second sedimentation rate monitoring point at the hydrologic monitoring station located near the west end of the pond near the control weir. Jim Harris, City of Federal Way October 20, 1995 Page 8 25) Please make the following typographic and grammar corrections: Page 1, paragraph 2, line 3 and ,4. Page 20, paragraph 1, line 1. Any other, as appropriate. Errors on Page 1, paragraph 2, line 3 and-4 were addressed in the revised final Monitoring Report. Place a 'period" in paragraph 6, line 4 of page 6: Remove the excess period from "Area 7" subsection on page 10, and in the last sentence of the first paragraph on page 24. Revise the first sentence on page 22 to "landscape contractor must monitor the health ... " 26) Do not obstruct storm drainage easement along old roadbed within Buffer Enhancement Area III. This item will be reviewed by the Public Works Department. 27) Coordinate planting of Buffer Area III with Lakehaven Utility District. This item will be reviewed by the Public Works Department. 28) Develop a five-year pond maintenance program to be approved by the Public Works Director, and, implemented by the developer that includes the following elements: a) nature of the potential maintenance; b) specifications for work; c) specifications for restoring and/or mitigating impacts; d) specifications for timing; e)- process for notifying the City of pending maintenance; f) appropriate bond and security must be provided for the five-year maintenance period. A five-year maintenance program was not included in the revised final Mitigation Report. The above items will also be reviewed by the Public Works Department. Items "e" and "f" will be reviewed by appropriate City staff. Please provide items "a" through V " of the above referenced five-year pond maintenance program for wetland review. Jim Harris, City of Federal Way October 20, 1995 Page 9 29) The financial guarantee for the wetland mitigation must be provided prior to impacting on -site wetlands. This item will be reviewed by appropriate City staff. 30) Payment of all wetland consultant invoices to date and arrangements for payment of inspection services must also be provided prior to impacting wetlands, per Condition 4 of the Mitigated Determination of Nonsignificance (MDNS). This item will be reviewed by appropriate City staff. 31) Coordinate the proposed catch basin at the south end of the pond with Ron Garrow of the Public Works Department. This item will be reviewed by the Public Works Department. 32) I anticipate you will be submitting a detailed topographic survey of the steep slope areas adjacent to Lots 50 - 58, per our previous discussions. This item will be reviewed by the Public Works Department. If you have any questions or if I can further assist in moving this project along, please call me at 789-9658. TO: FROM: DATE: RE: JOB NO.: OCT 18 MEMORANDUM Tim Harris, Senior Planner, City of Federal Way Keith Fabing, Wetland Biologist, Adolfson Associates,. Inc. October 11, 1995 ADOLFSON ASSOCIATES, INC. Final Heritage Woods Wetland Creation and Buffer Enhancement Plan Rev i ew 9595-38 The purpose of this memo is to provide comments on the final Wetland Creation and ButTer L-"rhancernerrt Plan: Heritai ze Woods Federal Way, Washington thereafter refereed to as the "Mitigation Report") prepared for Park Lane Ventures, Inc. by del Moral and Associates, dated October 10, 1995. These comments are based on a review of the revised plan that addresses my previous comments submitted in a memo to the City of Federal Way on October 10, 1995. My previous memo requested specific information which is required for the plan to meet the minimum mitigation plan, requirements as stated in Section 22-1358 of the Federal Way City Code..Action was taken on the majority of the comments. The following is a list of the information requested in the October, 1995 memo (described in bold), a summary of how each item was addressed in the final mitigation report (described in normal type), and items which require further action (described in italics). Additional comments are provided in the following section. 1) Please provide a separate sheet which depicts all finish grades and elevations for the project area. The site plan, which was prepared by Weisman Design Group dated September 1, 1995, depicts finish grades and elevations for the project area. Please provide a legend on the Sheet WI of the site plan which differentiates between existing and finish grade contours, and calls out all site plan symbols not included in the 'Landscape Schedule" legend on Sheet W2. 2) Please provide cross-section details for all created wetland areas demonstrating that wetland creation areas do not exceed a 20:1 slope ratio. Sheet W3 of the site plan provides cross-section details for Wetland Creation Areas 1, 4, 7 and 8 which demonstrate that these areas do not exceed a 20:1 slope ratio. Environmental Analysis 5309 Shilshole Ave. NW, Seattle, WA 98107 Phone(206) 789-9658 Fax(206) 789-9684 ew %41 Jim Harris, City of Federal Way October 11, 1995 Page 2 Please provide a cross-section details for Wetland Creation Area 5 and DEA A. 3) There is insufficient hydrologic information presented to assess the probability of success for Wetlands Creation Area DEA-A, Area 5 and Area 1. Please provide surface flow estimates for the intermittent stream associated with Wetland E which hydrologically supports Wetlands Creation Area DEA-A, Area 5 and Area 1. Jaeger Engineering provided a document titled Heritage Woods Projected Wetland Hydrolo v, dated October 8, 1995. This document provides projected 6-month peak drainage flow for Wetland Creation Areas 1, 5, and DEA-A. Please incorporate estimated 6-month peak flows in the "Hydrologic Discussion" section of the Mitigation Plan. 3) Please provide details for depth of excavations and precise alignment in the final site plan. It was agreed upon in a meeting with James Jaeger of Jaeger Engineering on October 9, 1995 that Mr. Jaeger will be present during the grading and construction of the meandering swales to direct specific location and depth for optimal hydraulic distribution. Please include the note describing this action in the "Site Topnaraphy Before & After Construction" section on page 9 of the Mitigation Report. 4) Please provide an erosion control and sedimentation plan addressing construction and post -construction conditions. An erosion control and sedimentation plan was submitted to the City of Federal Way, Department of Public Works. No further action is required 4) Please provide cross-section details for water spreader in final site plan. A cross-section detail of the flow spreader trench was provided on Sheet W3 of the Site Plan. No further action is required. Jim Hams, City of Federal Way October 11, 1995 Page 3 5) Please describe how the functions of Buffer Area II (which was originally associated with Wetland Creation Area DEA-A) and Buffer Area V have been incorporated into Wetland Creation Area 2. Buffer Area II was reintroduced into the site plan and described in the Mitigation Report. The implementation of Buffer Area V is no longer needed since drainage plans have been altered from the original Mitigation Report draft submittal. No further action is required. 7) Include a discussion in the "Maintenance Plan" section that a goal of the mitigation plan includes "installed plant materials will be self-sustaining without supplemental irrigation beyond the second year of the monitoring plan. This statement was included in the "Maintenance Plan" section. No further action is required. 9) Please provide for orange barrier fencing along existing wetland and wetland buffer setback boundaries during all construction activities. Orange construction barrier fencing is depicted on the Site Plan. No further action is required. 10) Please provide composted or other biosolid/organic soil amendments in all Wetland Creation Areas. A note to add composted or other biosolid/organic soil to the surface of all wetland creation areas to a depth of at least three inches was included under the "Planting Notes" section of the Mitigation Report. Provide for 25 to 30 percent compost on a volume basis. 11) Do not rely on the Wetland F drainage to provide a contingency for hydrologic support to Wetland Creation Area 4. It was agreed upon in a meeting with James Jaeger of Jaeger Engineering on October 9, 1995 that, as a contingency, additional hydrologic support could be provided from the storm drain adjacent to Wetland Creation Area 4. Please include a discussion of this contingency plan for Wetland Creation Area 4 under the "Hydrologic Support" section of the Mitigation Plan. Jinn Harris, City of Federal Way October 11, 1995 Page 4 12) In the contingency plan for Wetland Creation Area 7, reexcavate the entire Wetland Creation Area 7 to a depth within 12 inches of the groundwater level to attain conditions sufficient to support, and under normal circumstances, will support, a prevalence of vegetation typically adapted for life in saturated soil conditions. This also applies to the other wetland creation areas where hole deepening has been suggested to encounter required hydrologic conditions. This discussion was included for Wetland Creation Area 7 under the "Hydrology Discussion" section of the Mitigation Plan. No further action is required.. 13) Redirected stormwater from Military Road requires treatment through an oil/water separator and a biofiltration swale prior to discharge into Wetland Creation Area 5. It was agreed upon in a meeting with James Jaeger of Jaeger Engineering on October 9, 1995 that, as a contingency, additional hydrologic support could be provided from the storm drain adjacent to Wetland Creation Area 5. The contingency plan for Wetland .Creation Area 5 in the Mitigation Plan states that "the primary contingency measure is to redirect collected storm drain water from Military Road." Please include a discussion of the agreed upon revised contingency plan for Wetland Creation Area S under the "Hydrologic Support" section of the Mitigation Plan. Please delete paragraph 2 of the 'Biofiltration Swales and Other Biofrltration Features" subsection. 14) Please demonstrate how hydrologic integrity and connectivity will be maintained throughout Wetland D to prevent adverse impact to the remaining wetland fragments. Quarry spalls will be placed where the sewer maintenance road crosses Wetland D. The spalls will be underlain with filter fabric to assure wetland flow across the access road. A note describing this in included on the Site Plan. Please include this discussion under the 'Impact to Wetlands & Buffer" section in the Mitigation Plan. 15) The revised Wetland Creation and Suffer Enhancement Plan: Herita e Woods ]Federal Way, Washington by del Moral and Associates, dated September 1, 1995 states that Wetland Creation Area 5 is 2,000 sq. ft. in size. The site plan prepared by Weisman Design Group depicts Wetland Creation Area 5 as being 3,000 sq. ft. Please correct this discrepancy. Jim Harris, City of Federal Way October 11, 1995 Page 5 The Mitigation Plan has been revised to state that Wetland Creation Area 5 is 3,000 sq. ft. No further action is required. 16) As the pond is considered part of the detention system which receives excessive sedimentation and will require periodic removal of deposited sediments, positioning of a created wetland area within the detention system is not feasible. The Pond Edge Wetland Creation Area has been deleted from the Mitigation Plan. The jurisdictional status of the pond is provided in a letter written by James Harris. Please provide a description of the mitigation compensation credit provided by the existing pond which is consistent with the letter written by James Harris in the last paragraph of the "Preface" section, paragraph 2 of the "General Planting Concept" section, paragraph 1 of the "Mitigation Goals" section, and paragraph i of the "Summary" section. 17) Please address the sedimentation impacts to Wetland Creation Areas 8 and Area 2. Wetland Creation Area 2 has been eliminated from the Mitigation Plan and the Site Plan. A 12-inch berm has been incorporated into the Wetland Creation Area 8 design and is depicted on the cross-section detail on Sheet W3 of the Site Plan. Please revise the berm discussion in "Area 8" subsection of the "Hydrologic Discussion" section to reflect the design as described in the cross-section on Sheet W3 of the Site Plan. 18) All plant material substitutions must be approved by the City prior to on - site delivery and installation. This was included in the "Phase II" subsection of the "Mitigation Plan Schedule" section of the Mitigation Plan. No further action is required. Additional Comments: 1) The Mitigation Plan states in paragraph 1 of the "Preface" section that "the plan was accepted with some modifications and requests for clarifications." Paragraph 2 of the "Introduction --Project Description" section refers to "mitigation actions approved by the City of Federal Way." Jim Harris, City of Federal Way October 11 _, 1995 Page 6 Final approval of all aspects of the Wetland Creation and Buffer Enhancement Plan: Heritage Woods, Federal Way, Washington is subject to review of the Final Wetland Mitigation Site Plan, the Final Wetland Mitigation Planting Plan, and the final design document. Do not state that the plan has been "accepted" or "approved" by the City of Federal Way. 2) "Figure 1--Wetland Map form David Evans & Associates" was referenced in the "Location and Sizes of Existing Wetlands" section. Figure 1 was not included in the final Mitigation Plan. Please include "Figure 1--Wetland Map" in the final Mitigation Plan. 3) The last paragraph of the "Preface" section does not include the "Pond End" Wetland Creation Area" as one of the wetland creation areas deleted from the final Mitigation Plan. Please include "Pond End" Wetland Creation Area" at the end of the "Preface" section. 4) Paragraph 2 of the "Introduction --Project Description" section describes "wetland creation required to offset the unavoidable impacts due to construction of the drainage systems." Please also include a reference to the unavoidable impacts to Wetland A and Wetland L in this section. 5) A description of Wetland A (WL-A) is not included in the "Locations and Sizes of Existing Wetlands" section. Please include a description of Wetland A in the "Locations and Sizes of Existing Wetlands" section. For those wetlands that will be impacted, describe the impact for each wetland in their respective descriptions. 6) "Table 1 -- Summary of Impacted Wetlands and Buffers"'does not include the square foot impacted area for Wetland L in the "Total Wetland Replacement Area Needed." A description of Buffer Area E is not included in the Buffer section. Please include the 22,869 sq. ft. of impact area for Wetland L in the "Total Wetland Replacement Area Needed" in Table 1. The total should be 34,631 sq. ft. Include Buffer Area E (0.06 acre, 1:1 ratio) in the table. 7) "Table 2--Summary of Wetland Creation, Size and Replacement Type" does not include the size for Wetland Creation Area 4 under the "Size" column. The area of PFO under the "Type" column states that the area is 7,350 sq. ft. "Area 4" is described as being 7,750 sq. ft. in size on the following page and on the Site Plan. Jun Harris, City of Federal Way October 11, 1995 Page 7 Please state that the area for Area 4 is 7,750 sq. ft. in Table 2. The revised totals should be 22,825 sq. ft. for "Total Area Shown, " 9, 000 sq. ft. for "PSS, " 10, 450 sq. ft. for "PFO, " and 22,825 sq. ft. for the "Total. " 8) "Table 3--Summary of Buffer and Wetland Enhancements: Approximate Area and Species" describes areas (sq. ft.) for each Buffer Restoration Area. Please include areas (sq. ft.) for each Buffer Restoration Area in the Site Plan. 9) In the "Impact to Wetlands & Buffer" section, it is stated that the "fate of. WL L [Wetland L] is not known at this time." Please describe specifically how Wetland L will be impacted. Will it be filled or not? Adoption of a "no fill" option is preferred. 10) The Mitigation Plan states that "Weisman & Associates" created the Site Plan, The Site Plans states that "Weisman Design Group, Inc." participated in Site Plan development. Please correct all references to the "Weisman Design Group" in the Mitigation Plan. 11) In paragraph 2 of the Hydrological Patterns" section, it is stated that "the creation area is immediately adjacent to, or below a proven water source." Please revise this statement to state "below a seasonal water source. " 12) In the "Buffer Restoration Sites" subsection of the "Restoration" section, a description of "Buffer 11" is not provided. Please provide a description of "Buffer II" in the "Buffer Restoration Sites" subsection. 13) In the "Performance Standards" section, it states that "wetlands shall be established on an area of about 18,000 sq. ft. of existing wetland." Wetland Creation Areas will be created outside of delineated wetland boundaries. Please revise or delete this statement. 14) In paragraph 3 of the "Monitoring Plan" section, "Area 2" is included in areas where sample plots will be established. Wetland Creation Area 2 has been deleted from the Mitigation Plan and the Site Plan. Please delete "Area 2 "from paragraph 3 of the "Monitoring Plan" section. Include provisions for monitoring emergent and, aquatic vegetation, wildlife, amphibians, r� Jim Harris, City of Federal Way October 11. 1995 Page 8 sedimentation rates, and water level fluctuations (utilizing staff and crest gauges) for the pond area. 15) Please make the following typographic and grammar corrections: Page 1, paragraph 2, line 3 and 4. Page 4, paragraph 2, line 3. Page 4, paragraph S, line 2. Page 6, paragraph 4, line 4. Page 9, "Area 7" subsection. Page 20; paragraph 1, line 1. If you have any questions, please call me at 789-9658. ✓7p-IMER ELI 11 Ull llEEMr..A 9419 1.204 YLAKG - KENT, WA 98031 - (206) 850-0934 - October 8, 1995 H E R I T A G E W 0 0 D S PROJECTED WETLAND HYDROLOGY Pad( 727.5320 OCT 101995 CITY - EPi . FEDJ=SAL WAY BUILDING D The City of Federal Way has requested that a projection be made for the anticipated hydrology that might be experienced by the proposed wetland creation areas for the Plat of Heritage Woods. During a review meeting with the City and its wetland consultant, this issue was discussed and it was pointed out that attempting to determine the minimum hydrology would be very difficult without specific site historical rainfall data and an extensive hydrogeological study of the subsurface groundwater flow patterns. It was agreed that in the extent of these studies was unrealistic for this project and ultimately would be an educated guess since weather patterns cannot be predicted but forecast based on probability. Thus, it was agreed that the existing hydrologic data produced for the drainage analysis of this project could be used for this review. The projected peak flows for various storm events was calculated using the SBUH hydrograph method as outlined in the 1990 King County Surface Water Manual, which has been adopted by the City of Federal Way. The flows for the upstream offsite area and the developed project were calculated. The offsite area feeds the existing culvert under Military Road which subsequently provides the hydrology for proposed wetland creation areas #5 and DEA. The developed project flows will be routed through the detention pond and the biofiltration swale before discharging into the proposed wetland creation area #1. WETLAND CREATION AREAS NO. 5 AND DEA: The drainage flow that provides the primary hydrologic source for these proposed wetland areas is the same source that feeds the existing wetland area E. This source is the direct discharge from the concrete culvert under Military Road. An analysis of the contributing drainage basin yielded a 2 year peak flow of 5.66 CFS. This is shown on page 18 of the drainage report (copy attached). To determine the shortest practical storm event, the State DOE manual for the Puget Sound Basin was referenced. That document states that the volume of the 6 month storm is approximately 64s of that for the 2 year storm. Since the 2 year storm is the shortest period that design criteria are provided, this interpolation will be used to estimate the 6 mo. event. We will assume that the peak flows also are the same percentage as the volumes. Using this scenario, the projected 6 mos. peak drainage flow will be .64(5.66) = 3.62 CFS. WETLAND CREATION AREA NO. 1 This area will receive the discharge from the drainage detention pond and the biofiltration swale. The flow control weir catch basins in the existing pond will split the pond inflow to allow the proportionate share of runoff to travel through the pond. Thus, it is predicted that the peak drainage flows through the pond and into area #1 will be the same as the developed project drainage flows. Page 36 of the drainage report shows the calculated 2 year peak flow to be 8.68 CFS. This flow was calculated in the same way as the offsite flow. Using the same method as described earlier, the 6 mo. peak flow into creation area #1 is .64(8.68) = 5.56 CFS. MEMORANDUM ADOLFSON . TO: Jim Harris, Senior Planner, City of Federal Way ASSOCIATES, INC. FROM: Keith Fabing, Wetland Biologist, Adolfson Associates, Inc. DATE: October 4, 1995 RE: Revised Heritage Woods Wetland Creation and Buffer Enhancement Plan Review JOB NO.: 9595 (38) The purpose of this memo is to provide comments on the revised Wetland Creation and Buffer Enhancement Plan: Heritage Woods, Federal Way, Washington prepared for Park Lane Ventures, Inc. by del Moral and Associates, dated September 1, 1995. These comments are based on a review of the revised plan that addresses my previous comments submitted in a memo to the City of Federal Way on June 29, 1995. My previous memo requested specific information which is required for the plan to meet the minimum mitigation plan requirements as stated in Section 22-1358 of the Federal Way City Code. Action was taken on the majority of the comments. The following is a list of the information requested in the June 29, 1995 memo (described in bold), a summary of how each item was addressed in the revised mitigation report (described in normal type), and items which require further action (described in italics). Additional comments are provided in the following section. 1) Provide a detailed site grading plan and a detailed site planting plan with a plant schedule. Provide a design detail for planting collars used to enhance moisture collection. All created wetland areas must not exceed a slope ratio of 20:1. Document created wetland slope conditions in the grading plan. A site plan was prepared by Weisman Design Group which incorporates a planting plan and grading plans for the detention pond and the biofiltration swale, as determined by Jaeger Engineering. The site plan also shows wetland protection and creation goals and objectives, performance standards and success criteria, implementation procedures, the monitoring plan, the contingency plan and plant schedules. A planting collar detail was provided. Please provide a separate sheet which depicts all finish grades and elevations for the project area. Please provide cross-section details for all created wetland areas demonstrating that wetland creation areas do not exceed a 20: 1 slope ratio. Environmental Analysis 51309 Shilshole Ave. NW, Seattle, WA 98107 Phone (206) 789-9658 Fax(206) 789-9684 to Tim Harris, City of Federal Way October 4, 1995 Page 2 2) Provide a water budget for each created wetland with- surface and/or groundwater data demonstrating that the proposed wetlands will be inundated or saturated by surface or groundwater at a frequency and duration sufficient to support, and under normal circumstances, will support, a prevalence of vegetation typically adapted fir life in saturated soil conditions. Also provide soils data for each wetland creation area and discuss how the anticipated hydrologic regime will respond in on -site soils. Additional information on soil infiltration rates is required for all wetland area except for Area 8 which will be directly hydrologically associated with the existing pond. Water budgets were not provided for each proposed created wetland. Jaeger. Engineering prepared a document titled Soils Analysis: Heritage Woods Wetlands Creation Areas, dated August 29,1995. This report describes soil log holes and percolation tests which provide data on existing soil permeability and groundwater conditions. Table 1 summarizes groundwater conditions as described in the Jaeger Engineering report, and anticipated primary hydrologic support for each proposed wetland, as described in the del Moral plan. Table 1. Wetland Creation Area Hydrologic Summary (in order of proposed feasibility) Area Groundwater Elevation Surface Hydrology Percolation Rate Enhancements 8 pond edge pond edge not required excavation 4 approx. 24" not described 32 mpi* none 2 none; hardpan at 42" stream from pond 12 mpi flow spreader, terracing 7 approx. 36" existing wetland** 22 mpi flow shield DEA-A approx. 36" intermittent stream** 16 mpi flow shield, channelization 5 none; hardpan at 54" intermittent stream** 10 mpi channelization 1 approx. 42" (winter) Det.. pond overflow** 12 mpi terracing, clay liner, flow spreader * Minutes per inch ** No surface water hydrologic data provided There is insufficient hydrologic information presented to assess the probability of success for Wetlands Creation Area DEA A, Area 5 and Area]. Please provide Jim Harris, City of Federal Way October 4, 1995 Page 3 surface flow estimates for the intermittent stream associated with Wetland E which hydrologically supports Wetlands Creation Area DEA A, Area 5 and Area 1. 3) Provide details for swale installation and erosion control for Area 5. Minor excavations used to distribute surface water from the intermittent stream associated with Wetland E are shown on the site plan as arrows indicating the general flow directions. Please provide details for depth of excavations and precise alignment in the f n al 'site plan. Please provide an erosion control and sedimentation plan addressing construction and post -construction conditions. 4) Area A and Area 5 provide for stream channel "spreading." Demonstrate how diverted flows will be retained within created wetland areas. Diverted flows are shown on the site plan as arrows indicating the general flow directions. Please provide cross-section details for water spreader in final site plan. 5) Provide current plant material and installation cost for the revised planting plan. Provide for the cost of implementation of proposed contingency plans for each created wetland area. Costs for contingency implementation have not been provided. It was stated that Jaeger Engineering can provide cost estimates if this is a City requirement. No further action required. 6) Depict Buffer Areas II and V and the accurate wetland buffer setback for Area A. Buffer Area II (1,305 sq. ft.) and Buffer Area V (3,000 sq. ft.) have been deleted from the site plan prepared by Weisman Design Group. In a letter to David Morrison from Roger del Moral dated September 1, 1995, Dr. Moral states that `Buffer Area H and V have been deleted, since it is within Wetland Creation Area 2." Buffer H (1,305 sq. ft.) was described in Wetland Creation and Buffer Enhancement Plan: Heritage Woods, Federal Way, Washington by del Moral and Associates (Draft), dated June 15, 1995 as "a small area adjacent to Wetland Creation A. " A description of Buffer V was not included in the June 1995 draft. Please describe how the functions of Buffer Area H (which was originally associated with Wetland Creation Area DEA A) and Buffer Area V have been incorporated into Wetland Creation Area 2. Jim Harris, City of Federal Way October 4, 1995 Page 4 7) Depict the accurate wetland setback for Wetland Creation Area A in the Wetland Mitigation Site Plan. The 100-foot wetland buffer setbacks have been accurately depicted in the site plan prepared by Weisman Design Group. No further action required. 8) Revise the statement under the "Maintenance Plan" section that maintenance, especially watering, will be completed "as needed" to maintain planted areas in a healthy condition. Demonstrate how this system can be self- sustaining with minimum maintenance beyond the five-year monitoring period. The "as needed" wording was included. No discussion was added addressing the self- sustaining issue. Include a discussion in the "Maintenance Plan " section that a goal of the mitigation plan includes "installed plant materials will be self-sustaining without supplemental irrigation beyond the second year of the monitoring plan. " 9) All filter fences shall be constructed and maintained according to King County Surface Water Design Manual specifications. This wording was included under the "Mitigation Plan Schedule" section. No further action required. 10) Describe how hydrologic monitoring will be completed, provide a hydrologic monitoring, schedule that describes hydrologic conditions throughout the year, and describe how it will be presented in relation to existing climatic conditions. This was addressed under the "Monitoring Plan" section. No further action required. Additional Comments: 1) The Public Works Department prepared a list of comments on the revised Wetland Creation and Buffer Enhancement Plan: Heritage Woods, Federal Way, Washington by del Moral and Associates, dated September 1, 1995. Those comments have not been incorporated in this memo. Address comments prepared by the Public Works Department. Jim Harris; City of Federal Way October 4, 1995 Page 5 2) Please provide for orange barrier fencing along existing wetland and wetland buffer setback boundaries during all construction activities. 3) Please provide composted or other biosolid/organic soil amendments in all Wetland Creation Areas. 4) In the contingency plan for Wetland Creation Area 4, the report states that "should these plants fail due -to lack of hydrology, water could be collected directly from WL [Wetland] F drainage and spread above Area 4." Redirection of hydrology as described could have an adverse impact to existing hydrologic support for Wetland D which is-downgradient and hydrologically associated with the Wetland F drainage. Do not rely on the Wetland F drainage to provide a contingency for hydrologic support to Wetland Creation Area 4. 5) In the contingency plan for Wetland Creation Area 7, the report states that "in the unlikely event that it does not [provide for sufficient hydrology to ' support installed wetland plant materials], planting holes will be deepened:" If these conditions occur, reexcavate the entire Wetland Creation,Area 7 to a depth within 12 inches of the groundwater level to attain conditions sufficient to support, and under normal circumstances, will support, a prevalence of vegetation typically adapted for life in saturated soil conditions. This also applies to the other wetland creation areas where hole deepening has been suggested to encounter required hydrologic conditions. 6) In the contingency plan for Wetland Creation Area 5, the report states that "if hydrology fails, the primary contingency is to redirect collected storm drain water from Military Road to this area." Redirected stormwater from Military Road requires treatment through an oil/water separator- and a biofiltration swale prior to discharge into Wetland Creation Area 5. 6) It was stated in the report that "City regulations permit reduction in the ratio of 1.25: 1 if functions and values are retained." This alternative was explored as a potential option for the replacement ratio for Wetland L. The Federal Way City Code states under Section 22-1358(e)(3)(c): "The replacement ratios may be increased or decreased based on the following criteria: a. Probable success of the proposed mitigation. b. Projected losses in function or value. Jim Harris, City of Federal Way October 4, 1995 Page 6 C. Findings of special studies coordinated with agencies with expertise which demonstrate that no net loss of wetland function is attained under an alternative ratio." None of the above referenced criteria have been sufficiently demonstrated or provided to justify reducing the replacement ration for Wetland L from 2.1:1 to 1.25:1. 7) The site plan prepared by Weisman Design Group shows the sewer alignment intersecting Wetland D and dividing it into two sections. Please demonstrate how hydrologic integrity and connectivity will be maintained throughout Wetland D to prevent adverse impact to the remaining wetland ji-agments. 8) The revised Wetland Creation and Buffer Enhancement Plan: Heritage Woods: Federal WD, Washington by del Moral and Associates; dated September 1, 1995 states that Wetland Creation Area 5 is 2,000 sq. ft. in size. The site plan prepared by Weisman Design Group depicts Wetland Creation Area 5 as being 3,000 sq. ft. Please correct this discrepancy. 9) The site plan,prepared by Weisman Design Group depicts storm drainage being routed into the pond, then into the two -cell constructed detention pond, then exiting the second cell through a biofiltration swale towards Wetland Creation Area 1. This configuration suggests that the pond is serving as the first cell of the detention system where primary sedimentation will occur. Exhibit H. Wetland Analysis ^Required by Sections 80.35.3 and 80.160.4 FWZC states on Page 2: "The open water pond area is intended to be utilized as part of the on -site, surface water system." A Staff Report Prepared for Hearing Examiner Meeting of .tune 1, 1992, prepared by the Department of Community Development, dated May 22, 1992 states on Page 15, Section 14: "Existing on -site surface water ponds shall be retained as part of the storm drainage system and shall be utilized as a one -cell 'wetpond for treatment of runoff prior to entering the detention facilities or biofiltration swale. Discharge into the pond shall be oriented to maximize the retention and settlement times of water in the pond. The pond will be located in a surface water drainage tract to be dedicated to the City prior to final plat approval." The proposed Wetland Creation Area Pond is positioned within the existing pond. Jim Harris, City of Federal Way October 4, 1995 Page 7 As the pond is considered part of the detention system which receives excessive sedimentation and will require periodic removal of deposited sediments, positioning of a created wetland area within the detention system is not feasible. 10) The proposed elevation for Wetland Creation Area 8 is 371.7 feet. The normal water level of the pond as described on the Wiseman & Associates site plan is. 372:2, which will result in a portion of the created wetland area being inundated by surface water from the pond. The stormwater outfall pipe is positioned adjacent to this proposed created wetland. As configured, stormwater discharge into the pond will result in sediment settling and transport through Wetland Creation Area 8, and to a lesser degree, Wetland Creation Area 2. Excessive sedimentation can result in an adverse impact on wetland functions. Please address the sedimentation impacts to Wetland Creation Areas 8 and Area 2. 11) The report states in the "Planting Notes" section that "the Landscape Architect or Wetland Biologist will review plant material to verify conformance to the plant schedules and to plant characteristics and reserves the right to require replacement or substitution of plants that are deemed unsuitable." All plant material substitutions must be approved by the City prior to on -site delivery and installation. 12) Wall structures are proposed to be utilized for terracing in Wetland Creation Area 2. Do not use treated railroad ties due to release of toxic substances into the created wetland area and stream. Utilization of a "crib block system" (per Jim Harris recommendation) with vegetation plantings incorporated into the structure is a preferred alternative. Please provide a detail cross-section drawing of the proposed wall structures. Final approval of all aspects of the Wetland Creation and Buffer Enhancement Plan. Heritage Woods Federal Wa Washingion is subject to review of the final Wetland Mitigation Site Plan, the final Wetland Mitigation Planting Plan, and the final design document. If you have any questions, please call me at 789-9658. ACQU EMUMEEMN 9419 1.204, FLAU . UNT,W1 980A . U06D 850-0934 . rfiX 727.5320 S O I L S A N A L Y S I S H E R I T A G-E W 0 0 D S W E T L A N D S C R E A T I O N A R E A S Prepared for: Parklane Ventures 31620 23rd Ave. S., #320 Federal Way, Wa. 98003 Prepared By: James J. Jaeger, P.E. Field testing performed on August 29, 1995 SOILS ANALYSIS Soil log holes and percolation tests were performed at the Heritage Woods site on Military Road, south of Star Lake Road in Federal Way. The work was performed on Tuesday, August 29 on a partly sunny day. The soil logs were excavated with a rubber -tired backhoe. The percolation tests were dug fairly shallow, approx. 12" to 18" deep, using a post -hole digger. The locations of the tests were within the proposed wetland creation areas, as near to the center as possible. An effort was made to minimize the disturbance to the existing vegetation. The existing pond's water level was very low, approx. 16" above the bottom. The soils tests revealed the same characteristics in most every case. The underlying soils were a sandy silt, generally loose and dry, some with many cobbles. The topsoil layer also was mixed with loose, dry sands and silts. The only location that displayed any clays was within wetland creation area #4, next to existing wetland D. This is the area that currently resembles a wetland environment. The soils adjacent to existing wetland F were also tighter and wetter than the other areas. Keeping in mind that these tests were performed in the middle of the dry summer months, the indications of periodic groundwater were at depths of 36" below grade. None of the holes displayed any substantial seepage during the excavations. The holes were filled -in the same day for safety reasons. The percolation testing varied widely from 10 minutes per inch to 32 MPI. It was obvious that the condition of the topsoil and shallow soil layer determined the permeability of the pert hole. The loose, dry sandy topsoils lost the water charge fairly quickly. Based on these tests, it appears that area #4 and possibly area #7 have the tight surface soils that could retain the surface water necessary for a wetland environment. The other areas would need some type of import soil material or liner to facilitate the retention of water along the surface. It is proposed that clayly material found during the installation of the sewer mains in the lower areas be saved and installed in the wetland creation areas. Many of the areas will require fill to provide the maximum allowable slope. This fill, if only 12" deep, should be of a clayly or tight organic topsoil material. S O I L L O G S SOIL LOG HOLE NO. i'U-p- LOCATION: 2F+o scow "� r DEPTH BELOW SOIL GRADE: TYPE: COLOR: DENSITY: WATER: NOTE t 340 - - - - - - - - - _•.r�.]C`�R !- - � IT _�+- ���h _ _ �2 `/� c� _ r(i0 � S ± - - rn o4' 4c Liu \Y- "e.!r- ---------- ----------yam ------ ---- ___ ------ ---- PERCOLATION RATE: 15 r!1 rn . SOIL LOG HOLE NO. LOCATION: _Ie', `" r, I ^ f-tfi-c' DEPTH BELOW SOIL GRADE: TYPE: COLOR: DENSITY_ WATER: NOTE - - - - S+ ? ! { _-Tb spa C� 1i . he n - - 100s e_- �- `4=- `t-_DYflw Y __ ,^OTC. "sl "_ - - PERCOLATION RATE: 12 M,?,Z S O I L L O G S SOIL LOG HOLE NO. LOCATION: lkrTDk . so, DEPTH BELOW SOIL GRADE: TYPE: COLOR: DENSITY: WATER: NOTE PERCOLATION RATE: �r P 7--. SOIL LOG HOLE N0. ��,,�c2'`-� (Z�;•. �� ��: 4l`� \, �' ` _r_� LOCATION: DEPTH BELOW SOIL GRADE: TYPE: COLOR: DENSITY: WATER: NOTE "mil__ wl prp� cS S I _ , ,�,�__ It 6rDwh _ lo�S� - ��- ---vrpof -^--nS)s- _0.T_- 11_ �f'j -n---- ---- PERCOLATION RATE: ID S O I L L O G S SOIL LOG HOLE NO. lJ J e.H j h c f4ec'- 7 7� O"T', Q(d P-p LOCATION: DEPTH BELOW SOIL GRADE: TYPE: COLOR: DENSITY: WATER: NOTE i-os� �- ---------vim nc�vw ----- ----- I -------- ------ PERCOLATION RATE: ZZ M PIZ . SOIL LOG HOLE NO. Uj LOCATION: 35 DEPTH BELOW SOIL GRADE: TYPE: COLOR: DENSITY: WATER: NOTE u I D--21---- I d-- --- __ ----- ---� ----- IZ11--�g1 -- � I -- �rowh m0j, S 1� - j-N _ ----- t 40 PERCOLATION RATE: Ito N: �'-�. ue[ Moral 8z Associa s A I /" �' // a, �z r, -�- AI &D 2!�o 2002-42nd Ave. East Seattle, WA 98112 (206) 323-7106 FAX (206) 328-9050 RF:Ghlvhu by COMMUNITY DEVELOPMENT Ober 19, 1996 Mr. David Morrison 6 CT 18 1996 Park Lane Executive Center 31620 - 23rd Ave. So. Federal Way, WA 98003 RE: Monitoring of Heritage Woods Autumn Recommendations Dear Mr. Morrison: On June 11, 1996, I performed an as -built and initial monitoring for the Heritage Woods Project. As you know, not all of the work could be completed at this time, due to on -going con- struction. On September 19, 1996, I inspected the property to determine the degree to which further plantings are required. These plantings will replace mortality observed in June, additional mortality observed in September, make additional plantings in certain areas, and make substitutions in accordance with the developing hydrological conditions. This report documents the establishment of permanent plots, records the number of plants installed, compares the installations to the specifications from October 10, 1995, and from my memo of April 5, 1996. I show the approximate locations of monitoring plots on several figures. A series of recommendations are provided, several of which confirm comments I made to you in the field during our last visit. These recommendations should be implemented in late September or Early October, as soon as it appears that the Autumn rains have commenced. I note that replacement areas for Wetland E and for its buffer (former Buffer I and II) should not yet be installed since the construction is not yet complete. Methods In each of the following planted areas I counted all individuals that appeared to have been planted this spring. I noted whether or not the plants were alive or dead (or nearly so). These results are reported in the table. Where appropriate, I established permanent plots as follows: 1. Permanent plots 25 by 50 ft in Creation Area 1, and DEA-1, marked by four stakes; 2. Three permanent plots 30 by 50 ft in Buffer III and two permanent plots in Buffer IV, marked by stakes on either end of the plot; 3. Two permanent plots, 30 by 50 ft on the slopes of the detention, near Creation Area 1. The location of the plots are shown on the Figures. In addition, the figures show departures from the plan, as discussed below. I also counted all individuals in Creation Area 4. I did not locate the 11 plants for Enhancement Area D, since it is not clear that these were installed. Planting for these is specified below. Wetland Area 7 will require installation of woody species. No monitoring plot has been installed there. Inspection of this area revealed little successful planting at this time, but considerable invasion of wetland species in the creation zone. All woody plants within the monitoring plots were tagged with a number for future refer- ence and their heights measured to the nearest inch. Wetland Results Wetland Creation Area #1. This wetland was designed to be installed on a terrace near. the foot of a slope on the north side of the property. The plan was to leave most of the canopy intact and under plant. Because the detention pond required longer slopes, the overstory was removed and all ground cover stripped. This has resulted in substantially more stressful condi- tions than were anticipated. The soil was moist near the bottom of the plantings and dry up higher. The location of the creation area appears to have been shifted north as shown on Fig. 1. The hydroseeding for the slopes of the detention pond has been successful. Grasses and clover cover over 90% of the entire area. There has been natural invasion of red alder in places and, in scattered locations, black cottonwood has developed strongly. Table I summarizes the plantings for this creation area. The plantings were moderately successful in June, and there remain more plants than specified. Within the permanent plot, there were 26 living salmonberry and 10 living lady ferns. Mean height for the salmonberry was 15 inches. Table 1. Summary of installation for Creation Area I. —June 1996. Species # Specified # Planted Living Dead/missing Salmonberry 20 62 58 4 Red -twig dogwood 10 15 0 15 Lady fern 30 30 21 9 TOTALS 60 107 79 28 However, during the summer, many of these plants died, primarily due to drought. Because the as -built conditions differed from the design specifications, the planting mix has been changed to offer better chance of success (see Recommendations for Remediation). Wetland Creation Area DEA-1. Considerably more clearing around this wetland has occurred due to road construction. This has resulted in disruption of the original water source. Remedial action has been effected. A single permanent plot was established (Fig. 2). 2 Conditions are relatively good, though some remediation is required. Table 2 summarizes the situation for this wetland area in June, 1996. Within the permanent plot, the mean height of 5 red cedars was 35 inches; that of the 8 willows was 26 inches; the mean of the 17 salmonberry plants was 24 inches; and the mean of the red -twig dogwood was 19 inches. There were 9 lady ferns in the plot. Table 2. Summary of installation for Creation Area DEA-1, June, 1996. Species # Specified # Planted Living Deadlmissing Red cedar 10 7 5 2/3 Willows 30 8 8 0/22 Salmonberry 15 17 17 0 Red -twig dogwood 0 4 3 1 Lady fern 20 9 9 0/11 TOTALS 75 45 42 3/36 Wetland Creation Area 4. A substantial portion of this wetland area was not planted as indicated on the plan or as directed in the field. Much of the area planted will have difficulty establishing (Fig. 3). 'Table 3 summarizes all the plants installed in this area, as no permanent plot was established. The red cedars have been planted in cleared areas that were quite dry. Hence survival has been poor. Willows are doing reasonably well. There rapid growth may have permitted them to reach ground water. Lady ferns are marginal, with those nearest the existing vegetation doing well. Overall, the correct number of plants were installed, with more willows and fewer salmonberry. However their location is not correct. The mean height for woody plants was: Red cedar, 37 inches; willows, 27 inches; and salmonberry, 20 inches. Table 3. Summary of installation for Creation Area 4, June 1996 Species # Specified # Planted Living Dead/missing Red cedar 10 10 3 7 Willows 30 44 44 0 Salmonberry 21 8 8 0/13 Lady fern 21 21 16 5 TOTALS 82 83 68 25 As discussed under remediation, the area adjacent to existing wetland will be enhanced as discussed below. Wetland Creation Area 7. The surface preparation for this wetland has not been per- formed. Initial plantings of skunk cabbage and ferns were successful, but subsequent erosion has left few plants intact. Fig. 4 shows modification of the previous plan, which is discussed below. During the summer, lady ferns have developed strongly, and horsetails cover most of the site. It remains to have the final grading and filling done, but willows can now be planted within the orange -flagged area. Red cedars can be planted on the margins of the site. 3 Wetland Creation Area 8. The pond fringe was constructed extremely well. There are several major problems, however. First and most crucial, is that the pond itself was 3 to 4 feet lower than the level required to maintain hydrology for WL-8 in June, and lower still in September. Second, the woody plants were not planted in clusters of 3, only as individuals, resulting in a low density. Third, the resident Canada geese (2 adults and 3 goslings were observed) have grazed many of the herbs planted. Due to the lack of hydrology, most dogwoods have died. Due to the lack of hydrology and grazing, most of the herbs have died. I deemed it not prudent to attempt species identifications of the herbs. Most survivors were slough sedge. Some rushes were planted and a few have survived. Fig. S shows this site. Table 4. Summary of installation for Creation Area 8, June, 1996. Species # Specified # Planted Living Dead/missing Willows 63 18 18 0/45 Red -twig dogwood 63 21 1 20/42 Herbs (sedges/bulrushes) 360 not known 90 270 TOTALS 486 -- 109 377 The total for all, plants in this portion of the project is shown in Table 4. Fewer than 1/3 of the specified shrubs were planted, and only 1/4 of the herbs have survived. The mean size for willows was 27 inches. Other Wetland Areas. Wetland Creation Area 5, replacement Wetland E, and the enhancement of Wetland D have not yet occurred. Buffer Area Results Detention Area. The north and west slopes of the detention pond are within the buffer of Wetland C, off -site. Snowberry and a small amount of Nootka rose were planted in clusters of 5 on this slope. Two permanent plots were established as shown on Fig. 6. The memo of April 5, 1996 specified that 375 shrubs, in clusters of 5, be planted. Only about half were planted (Table 5). The mean value for snowberry in Permanent Plot 1 was 25 inches (n=30). In Permanent Plot 2 it was 27 inches (n=27). No roses occurred in the monitoring plots. Table 5. Summary of installation for Detention Pond buffers, June 1996. Species # Specified # Planted Living Dead/missing Snowberry 300 150 136 14/150 Nootka rose 75 15 13 2/60 TOTALS 375 165 149 16/210 Buffer III. Buffer III was planned to compensate for a narrow access road. The installed road is wider. In April, additional plantings were recommended to compensate for the wider road. Fig. 6 shows the location of monitoring plots and approximate extent of plantings. The total number of plants in this area is shown in Table 6. The number specified is the total from El the original specifications plus those for the supplement. The actual planting appears to reflect plantings as originally specified, without the supplement. Table 6. Summary of installation for Buffer III, June 1996 Species # Specified # Planted Living Dead/missing Douglas fir 0 9 9 0 Western hemlock 64 43 29 14/21 Red cedar 12 5 5 0/7 Osoberry 12 0 0 0/12 Red elderberry 22 10 8 2/12 Snowberry 100 65 57 8/35 Salmonberry 0 13 13 0 Sword fern 88 116 102 14/0 TOTALS 375 165 149 16/210 The mean sizes for plants in the permanent plots of Buffers III and IV are shown in Table 7. Buffer IV. The soil of this area has been compacted, so growing conditions are not good. This is reflected in the degree of mortality on this site, despite the less stressful conditions. Table 8 summarizes the planting conditions for the entire area. Table 7 shows the mean size of plants in the permanent plots. Table 7. Summary of mean sizes of woody plants in Buffers III and IV. Buffer III- #1 #2 #3 Buffer IV-#1 #2 Species n x n x n x n x n x Douglas fir 7 20 Western hemlock 10 20 6 22 3 43 5 51 Red cedar 5 36 Snowberry 16 24 7 22 5 32 3 29 Red elderberry 1 22 2 16 1 11 Salmonberry 7 25 Willow 1 42 Table 8. Summary of installation for Buffer IV, June 1996 Species # Specified # Planted Living Deadlmissing Western hemlock 25 30 22 8/0 Osoberry 8 0 0 0/8 Red elderberry 8 5 5 0/3 Snowberry 36 21 16 5115 Sword fern 50 30 15 15/20 TOTALS 127 86 61 28/41 Comments on Planting Procedures Implementation procedures noted on page W2 of the planting plan include specific requirements for correct planting. The following deviations or potential deviations were noted and should be addressed: 1. In some cases in the buffer plantings, burlap was not removed from the top 1/3 of the planting ball, and the plants were not planted to a sufficient depth. 2. It does not appear that the planting holes were back -filled with planting soil and there is no evidence of moisture retention pellets being added to buffer zone plantings. 3. The surface of wetland creation areas do not appear to have had compost, organic soil, or any other organic amendments added. All fill soils are noted to be 25 to 30% compost or biosolids. The effect of this is that the soil medium in the wetland creation areas are quite stressful. 4. The wetland biologist did indicate in general the location of plants and, in general, plants were located properly. However, there are several cases where inappropriate material was placed in the wrong location. Recommendations for Remediation General. All wetland creation areas already installed and to be installed should have organic matter added to the surface and worked into the upper 3 inches. All future plantings, including replacements of dead plants and plants in buffers and wetlands, should be planted as per specifications, including suitable back filling, soil collars, and granular polymers. The exact location of future planting should be supervised by a wetland biologist. The locations may be marked in the field with appropriate flagging. Alternatively, the plants may be placed in their containers at the proposed site, inspected by the wetland biologist, and, if necessary, moved to a more appropriate location prior to the planting holes being excavated. Table 9. Summary of additional plantings needed in creation areas, based on June monitoring and September observations. Specified quantities are more than the overall estimated mortalities. Species Area 1 I DEA-1 A-4, rep. A-4, enh. Area 7 Area 8 Red cedar 0 5 10 5 5 0 Willows 20 30 0 30 20 200 Salmonberry 30 0 20 10 0 0 Red -twig dogwood 0 0 0 0 0 0 Lady fern 20 20 10 5 0 0 Slough sedge 0 0 0 0 0 300 TOTALS 70 55 40 50 25 500 Wetland Creation Area 1. The site is steeper and drier than anticipated. During the summer, the wetland area should be irrigated as often as possible until plants are established. These recommendations should be implemented during the Autumn replanting. 1. The entire surface area near planted individuals should be cultivated to break up the soil and improve infiltration. 2. Bark or other mulch material should be added to each plant within the planting collars. It is recommended that the upper wetland area be terraced by hand to provide a step -like contour, as envisioned originally. The steps should be small and need not be uniform across the slope. 3. Losses of salmonberry should be made up'with additional salmonberry, planted more deeply and in moister microsites. They should survive given 6 to 9 months in which to establish before next summer. 4. The losses of red -twig dogwood should be replaced by willows. Willows have proven themselves on this site and have quick -growing, deep roots that should tap deeper water sources. 5. Fern mortality has increased during the summer. With a cool season and protection from the established ground cover, these plants should do better. There were 15 surviving ferns. The provision of an additional 20 provides for more than the original specification and gives greater margin for error. Wetland Creation-DEA-1. The drainage for this wetland must be filled and stabilized. I recommend that the channel first be filled with cobbles, then filled with soil. The outlet must be raised and stabilized to permit water to be retained within the wetland. The upper drainage area needs to be fine-tuned so that water is better distributed over the wetland area. Note that plans for Wetland Creation Area 5 should be taken into account when taking these remedial actions. Additional plants to be added should be limited to willows and salmonberry, which are doing well considering conditions. The numbers shown in Table 9 take into account mortality and plants to be planted after final grading occurs. Wetland Creation Area 4. The following plants should be planted within the existing vegetation as shown on Fig. 3: 5 red cedars; 30 willows, 10 salmonberries, 5 lady ferns (Table 9, enhancement). Prior to planting, non-native shrubs, including Himalayan blackberry and other blackberries, should be cut back to the ground. Ground layer vegetation around each planting hole should be cleared to reduce competition. As discussed previously, water from drainage sources should be spread over this area from the place indicated on Fig. 3. New plants should be installed in shallow depressions. Wetland Creation Area 7. Fig. 4 shows modification of the previous plan. First, the drainage needs to be filled and stabilized. A berm as shown needs to be constructed. Prior to h planting, most of the dead debris should be removed. When the site is prepared, then 20 plants each of lady fern, skunk cabbage and willows should be planted. Wetland Creation Area 8. During the summer of 1996, irrigation was applied to this site. This permitted the survival of willows and the invasion of dense cottonwoods, some alder, some willows, willowherb, lady's thumb, curly dock, clover, and other weedy wetland herbs. Nearly all planted willows survived, but few red -twig dogwoods did. Natural revegetation will ensure that the site has hydric vegetation, but the nature of the emergent zone is in doubt. A longer term solution would involve transferring more water into this drainage. There has been significant disruption hydrology in the watershed. If hydrology is rectified, then replanting should be undertaken using only slough sedge for the herbs. This species has survived grazing and drought. The zone of planting should be confined to that where woody invasion is limited, and where annual wetland herbs have invaded. Willows should be used to replace woody materials. I estimate that over 300 slough sedges and at least 200 willows will be required.. The willows will replace the 63 specified dogwoods and supplement the willows not planted in the spring. Three willows should be planted near each dogwood and 2 near each planted willow. Natural colonization will enhance this limited diversity. Detention Pond Buffer. The plantings for this buffer are successful to date. The hydroseeded material covers over 90%, and in places there has been invasion by desirable woody species such as red alder and cottonwood. During the autumn, the planting should be supplemented with' an additional 150 snowberries, planted as before, between the existing plantings. The new clusters should be staggered both horizontally and vertically. At least 75 roses should be planted along the lower portion of the slope to bring up the numbers to the specifications. See Table 10. Table 10. Summary for Buffer Replantings, based on June mortality and September survey. Species Detention Buffer III Buffer IV Douglas fir 0 30 20 Western hemlock 0 10 10 Red cedar 0 10 0 Osoberry 0 15 10 Red elderberry 0 20 5 Nootka rose 75 0 0 Snowberry 200 50 25 Salmonberry 0 10 0 Sword fern 0 20 40 TOTALS 275 165 110 8 nm Buffer III. In order to bring the planting density up to specifications, and to compensate for summer mortality, I recommend planting the species shown in Table 10. 20 Douglas fir and 60 snowberry. These species are doing well in the overly dry conditions that have developed. In addition, on the north side, an additional 10 red cedar should be planted in wetter locations. Buffer IV. The entire surface of this buffer zone should be cultivated to improve infiltra- tion and natural recolonization. Several of the hemlocks are quite large and currently healthy. However, they were not planted deeply enough, and the burlap not partially removed, as per specifications. This should be rectified. The missing plants should be installed, but planting holes should be deeper and larger. In addition, a bark mulch, as per specifications, should be installed. Dead hemlocks should be replaced by Douglas fir. The other species should be replaced. In September, natural red alder regeneration had begun where the soil was not compact, so shallow cultivation should improve natural development. Conclusions A good beginning has been made in the wetland creation process. This project has always presented significant challenges, which continue. The following summarizes the work remaining: 1. Wetland Creation Area 1. Irrigate during the summer, mulch and cultivate, replant in Autumn. Install gravity -fed spreader system to maintain hydrology if possible. Possibility exists that small steps be placed in this area. 2. Wetland Creation-DEA-1. As soon as feasible, fill drainage and stabilize with a berm. Replant in Autumn. 3. Wetland Creation Area 4. Plant willows and salmonberry in early Autumn. Remove undesirable vegetation at this time. Provide for enhanced hydrology. 4. Wetland Creation Area 5.' Install as per specifications when construction is complete. 5. Wetland Creation Area 7. Fill in drainage and install berm. Replant as described during the Autumn. 6. Wetland Creation Area 8. Rectify lack of hydrology as soon as feasible. Replant in early Autumn. Replace red -twig dogwood with deep-rooted willows. permit. 7. Enhancement Area D. Plant within existing canopy as specified in Autumn. 8. Wetland Replacement E. Install in Autumn, or as soon as construction and hydrology 9 9. Buffer areas I and IT Plant when construction complete according to specifications. Should be planted within 50 ft of replacement wetland 10. Buffer areas III and IV. Install additional plants as specified. Cultivate surface of Butter IV in Autumn. Rectify deviations from planting specifications and planting schedule. 11. Detention Pond Buffer. Supplemental irrigation would improve survival. Plant addi- tional material not installed in Spring after the first Autumn rains. 12. All planting recommendations stated on the planting plans should be followed to maximize success. This concludes my report. It is a revision of the report submitted to you on June 13, 1996. It incorporates modified recommendations resulting from the ways in which plants responded during the summer of 1996. If you have questions, please call at once. Please note that it is your responsibility to forward this report to the City of Federal Way. Sincerely, go','4" hop-4- Dr. Roger del Moral, C.S.E. Owner cc: J. Jaeger, Project Engineer 10 utnuMRECEIVED r 4FPAMUW , MAR Z g t,996 March 26, 1996 ADOLFSON ASSOCIATES, INC. Jim Harris, Associate Planner City of Federal Way Department of Community Development Services 33530 First Way South Federal Way, Washington 98003-6210 RE: Heritage Woods Culvert Extension Wetland Mitigation Plan Review Dear Mr. Harris: At your request, Adolfson Associates, Inc. (AAI) has reviewed the Final Wetland Creation and Buffer Enhancement Plan: Heritage Woods, Federal Way, Washington (Revised) (dated October 16, 1995), prepared by del Moral & Associates, for ParkLane Ventures, Inc. (hereafter referred to as the "Wetland Mitigation Plan"). This letter reports on our review of the proposed revisions of the Wetland Mitigation Plan (Plan Sheet W1) in regards to compliance with Section 22-1358 of the Federal Way City Code (FWCC) in addition to previously agreed upon conditions relating to the plan. Items which require further action are described in numbered italics. The following documents were submitted to AAI for completion of the Wetland Mitigation Plan review: Final Wetland Creation and Buffer Enhancement Plan: Heritage Woods, Federal Way, Washington (Revised) prepared by del Moral & Associates, October 16, 1995. ■ Letter to Stephen Clifton, Development Services Manager from James Jaeger, P.E., Jaeger Engineering, February 20, 1996, RE: Heritage Woods - Culvert Extension from Military Road (with attached drawings). AAI understands from observation that you made in the field today (March 26) that Wetland E has been completely cleared and filled without authorization from the City of Federal Way. Table 1 of the Wetland Mitigation Plan describes the impact area of Wetland E to be 0.025 acres. The total filled area is now 0.05 acres (2,178 sq. ft.). The wetland replacement ratio for Wetland E is 2:1. Therefore, the created wetland area needed to compensate for the loss of Wetland E is 0.1 acre (4,356 sq. ft.) instead of the 2,178 sq. ft. described in the Wetland Mitigation Plan. 1. Describe the chronology of events which resulted in the unauthorized f lling of Wetland E. Environmental Analysis 5309 Shilshole Ave. NW, Seattle, WA 98107 Phone. (206) 789-9658 Fax (206) 789-9684 C, Jim Harris, City of Federal Way March 26, 1996 Page 2 2. Revise the Wetland Mitigation Plan to provide for an additional 2,178 sq. ft. of created wetland. This brings the total wetland replacement area needed to 36,809 sq. ft. instead of 34,631 sq. ft. The mitigation credit for the on -site wetland 'pond " cannot exceed the 11, 806 sq. ft. that was agreed upon in October, 1995. Revise all applicable sections of the Wetland Mitigation Plan to reflect the additional wetland creation area discussions. 3. Since Wetland E no longer exists, delete the buffer enhancement area for Wetland E (2,610 sq. ft.) from the Wetland Mitigation Plan and Plan Sheet Wl. Mr. Jaeger stated in his above referenced letter that: "This culvert extension would carry the culvert flow past the toe of the Military Road fill within a pipe rather than an open ditch. The ditch, which is very visible in the field, poses a potential erosion problem to the future Military Road slope." 4. Revise the "Area 5 " subsection of the "Hydrologic Discussion " section and the "Hydrological Patterns" section of the Wetland Mitigation Plan to describe the hydrologic support from the proposed culvert extension. The Wetland Mitigation Plan states under the "Area 5" subsection of the "Hydrologic Discussion" section that: "the primary contingency measure is to redirect collected storm drain water from Military Road to this area. The proposed culvert extension concept is essentially the same concept described in the above referenced contingency plan, as described in paragraph 12 of the "Contingencies" section and paragraph 3 of the "Hydrological Patterns" section. Mr. Jaeger contacted Adolfson Associates, Inc. on October 20, 1995 stating that he had contacted the parties responsible for the proposed Military Road Improvements Project. Mr. Jaeger stated that he had discussed the above referenced contingency plan with these parties and described the concept as utilizing an oil/water separator and a biofiltration swale within the Military Road right-of-way. He also stated that the above referenced parties had agreed that this contingency plan could be implemented, if necessary. 5. Since the above referenced contingency plan is proposed to be implemented, provide for a new contingency plan for "Area 5 " in paragraph 12 of the "Contingencies" section. 6. Revise Plan Sheet WI to depict the above referenced oil/water separator and a biofiltration swale within the Military Road right-of-way. 7. Erosion and sedimentation control measures which protect on -site sensitive areas should be in place and inspected by the City prior to proceeding with construction activities adjacent to sensitive areas. Coordinate this project review with the Public Works Department to insure that the Erosion and Sedimentation Control Plan is revised and approved prior to approving the revised Wetland Mitigation Plan. Jim Harris, City of Federal Way March 26, 1996 Page 3 Mr. Jaeger also requested to add fill material within a proposed created wetland buffer area as depicted on the revised plan. This area was not shown on the revised plan faxed to AAI for review. Fill material is not to be placed within existing wetland or wetland buffer areas. 8. Provide AAI with a copy of the full size blueline of the revised Sheet WI of the Wetland Mitigation Plan depicting the area designated for proposed placement of fill material. Section 22-1358(e)(4) of the FWCC states: "All required wetland mitigation improvements, except monitoring, shall be completed and accepted by the Director of Community Development prior to begimung:activities that will disturb regulated wetlands, and shall be timed to reduce impacts to existing plants and animals. " 9. Complete all required wetland improvements, except monitoring, and obtain acceptance by the Director of Community Development prior to beginning activities that will disturb regulated wetlands and their associated -buffer areas. Time ongoing construction -activities to reduce impacts to existing plants and animals. Adolfson Associates, Inc. appreciates the opportunity to provide continued service for the Department of Community Development. If you have any questions or if I can be of further assistance on the Heritage Woods project, please call me at 789-9658. Sincerely, r Keith F. Fabing Project Biologist I I i I i C ' � I I a � •r� � (i i ', GL N z � � rang 0- rC: a� y 2 r/] C13 z v5 U HOINvx9 re. Eu] w z (w� O J1 i f a L a� v� C v a G' C it :4 .p 4_, C;! ti^ LS. ' T rc 0 0 a ° 00 •u •p, k U A CO W (7a u 641- 6R 613, fR 6R 6H V%l d4 6R w a, rA s Lo .2 cl .. .2 cc y >. uca F � a A q i W e c o � ° a• 4 i A W ❑ ❑ ❑ ❑ ;� c I by �, m ❑ � G O � w - pU �� xm o z 01:4 71+ '' a� Q oo cC N N p C>t, O C .�.. O �. IrCJ Lam.. Q Q. CC 4 C'si s (d •b C-) , a U 'o a �p„r El ❑ .4 M 04 N a cs � C• x o o W NU ci c CL .d by y •b U W '.0 N bA CC. CL o ° ° a)'C E w 3 j O c ❑ ca UU cy b U a u 4 V] Wo U p 6xo w Cd o❑� El El wl� w a o y ++ 0 OW Cj ct Q r w a� O 6J C r Y cj w a a, a - d' ,� •sue'. ba tw y •� r0+ a .2 r. urn N b�A ■■ 3 w bO�q 05 (3 z AJ) ice, c� co z co a 'cl E F1 NQM C13o m C° p Q00 O" goy U' ° C O L. Q C , ° U W C C 'b •0 bb 4• 4 U N .� N N C C b M � � o q w° 15, rU✓ c o ' 3 q 0 'may W U OT [ w b ro R Q O z ¢, .N .D y ^� b '� L, c3 U UC O ° ff• U by >, b G O"•b N • a • an Cl.•o c U a O� o N. Elz w~Q U Urz N W 3 b o U vOi C."L v O 2 X 'C ❑ H p� v U U vi U U fd C) 00 o y U C cs O H 4 q z .0 C U -s ' 7 O S' O O Vl O U 0000 .W-. �° H �Q .'c o4)aC a � N W y W vLi.00 w ..z a� Z co cU z ac°o cq t: > O ~ ti 4 W O d a Z a'CQ`.9a) 19 cm a G 4) 4. ° o Y a w cC O 00 0 °o .O O 'O O �6q 00 .d N q �". ca O y U 7 � •ar-J �w Y Y O O 0- 0 4 U ca .n a 3� C ca 0.0 ^ "4.) c U Uwv CZ 0 In BAN U 0 Q � ON w¢ � Ca01 >U a`HP C.' cC 0 b E � i(Dra tj G n :CD r 0 0CD .• �0 Z CD � (.A _ "a •• [xi 0 to ►'7 CD r•r r-w rC�•ybp ?' CL � �:r t5 0t r • �+ � o` ca. � � w :D y CD n G rro�,� n 0 �^4 p C� Y. P- CDit • CD O p r • :3 NRWW CD CAD`. > n cx� =5 ca vi C? c (M o y .-.... n � ,rVj p!'j ►+. CD y z ` yr�wg CD �M�"'1 �• J. y� fl tz y CD 0 CD ~ O ►•1 cr RD CD a o CD CD `D ° , a d o� s� o �° � CD - c� o 45 R CD 00 CD -�. CA a'° CD CD •D C b CD o CD :M C) n CCD cCA C�i p C�'�+D C. �.Gy► �P O 1�11 C/� 00 ,f"r 61 "1 C• C CD CD .LA; O 0 :t k .« EXHIBIT A Legal Description, A Portion of Parcel D, Heritage Woods, to be dedicated as road. That portion of the Southwest Quarter of the Northeast Quarter of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington, described as follows: Beginning at the Southeast corner of said subdivision, thence N88°23'41 "W along south line thereof 180.29 feet to the westerly margin of New Military Road and the True Point of Beginning; thence continuing N88023'41 "W a distance of 24.05 feet; thence N35°22'32"E a distance of 246.13 feet to the East line of said subdivision, thence S01010'12"W along east line of said subdivision a distance of 35.57 feet to the westerly margin of New Military Road; thence S35°22'32"W along said westerly margin of New Military Road, a distance of 203.34 feet to the True Point of Beginning, containing 0.1 acres more or less. Together with portion described as follows: Beginning at the Southeast corner of said subdivision, thence N88°23'41 "W along south line thereof a distance of 42.13 feet to the Easterly margin of New Military Road; thence N35022'32"E along said margin, a distance of 74.94 feet to the East line of said subdivision; thence S01Ili 0'12"W along east line of said subdivision 62.30 feet to the Point of Beginning, containing 0.03 acres more or less. a J � ANAL LA�� � ��e�..� a O 04 O E-• a i r� U cd 3 I A m W 3 !r � lz 1 I ! 1 I L--------------- I m U m v 0 U h V w 'SS e a G N a �w c) U 7 Q > amw >•=aoOU J ¢ J � o m z m N Z m LE 0 n z 0 0 r- C+i to w "A 00.6 031 2W S0N033N AIM03 9NIN Ntl 00:60:60 Z030-90EOZ6 .44 EXHIBIT A Legal Description, A Portion of Parcel D, Heritage Woods, to be dedicated as road. That portion of the Southwest Quarter of the Northeast Quarter of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington, described as follows: Beginning at the Southeast corner of said subdivision, thence N88023'41 "W along south line thereof 180.29 feet to the westerly margin of New Military Road and the True Point of Beginning; thence continuing N88023'41 "W a distance of 24.05 feet; thence N35022'32"E a distance of 246.13 feet to the East line of said subdivision, thence S01010'12"W along east line of said subdivision a distance of 35.57 feet to the westerly margin of New Military Road; thence S35022'32"W along said westerly margin of New Military Road, a distance of 203.34 feet to the True Point of Beginning, containing 0.1 acres more or less. Together with portion described as follows: Beginning at the Southeast corner of said subdivision, thence N88023'41 "W along south line thereof a distance of 42.13 feet to the Easterly margin of New Military Road; thence N35022'32"E along said margin, a distance of 74.94 feet to the East line of said subdivision; thence S01010'12"W along east line of said subdivision 62.30 feet to the Point of Beginning, containing 0.03 acres more or less. DRk , L LAND I T N w � � A a vi�C ° w Owl w�ya rA a F- I E 0.0 o W u;UoA W vU 'W w o i N y w [� ww�u i �EE t: z O w CG i. Q A ,00 f y d z uo F �w M h �s ry •i M N a) y z C6 U mHHJA 9 �I�ARg C'r'1 C) a Q`l G1 Cr a� 4} r-1 ;r M cZ n� Q; r� e� G: r•I �l Ga '4 � ° Y r7 C G7 0 V v) U I 4+ z 0 O A � O q, G Q O w ► X 7i _ -1 � i r� �G 'xci y L•i _,` ri x Co c 1' ^O N C) •U ri :.� 1 n sg v} u4 v3 cs� v� v} v} v3 .-, sue. y bD ., a co Ln r U z \S rl L1 CV) q. •�.� 1� .r{ +^ ca c, Or a } rA rA rA oQ4 0. 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G CD O EXHIBIT A Legal Description ,Tract B, Heritage Woods That portion of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington, more particularly described as follows: Commencing at the center of said Section 33 said point being a concrete monument with Brass Cap and Bears N 01 °03'43" E, a distance of 2632.77 feet from the South Quarter corner (Monument in Case) of said Section 33; thence North 88023'27" West along the North line of the Northeast Quarter of the Southwest Quarter of said Section 33, a distance of 401.28 to the True Point of Beginning; thence continuing North 88°23'27" West along said North line a distance of 10.00 feet to the Northeast corner of the Plat of Laurelwood North No.4 as recorded in Volume 87 of Plats, Page 8, records of King County, Washington; thence South 01 °03'43" West along the East line of said Laurelwood North No. 4, a distance of 86.58 feet; thence South 63-39-58" East, a distance of 125.56 feet to the beginning of a curve to the Right, radial to said line, having a radius of 50.00 feet and a central angle of 11032'13"; thence along said curve an arc distance of 10.07 feet to a point on the curve; thence North 63039'58" West, a distance of 120.23 feet; thence North 01 °03'43" East a distance of 80.24 feet to the North line of the Northeast Quarter of the Southwest Quarter of said Section 33 and the True Point of Beginning. Containing 0.05 Acres, more or less. 0 E O rI •r'� Q1 ?+ U { a •z O ca U r Q� �r7y'1 SLR(- � rti css T ,--1 QS F_: 0.l1 W � 44 m c H O O cc ?. 3 co 1.�J 4-I U r l w ci •,-I o H q —� UDa co —4 J C �`{I+ w p N 00 o C F -P U :9 ❑ � m zi Q6 a� o c� Po 0 o s U `" «� o ca F Li. C s to r4 a r V T- N r-- __--_--_.---I co r 1 1 IZ 1 1 I L------_-----------r 00.6 e a �Y W U G Q j Q M W }ao � ��m J i Lu O m Lu Z cc N Z mCc E m c d Z 031 200 SOSO33Y Lon mix Nb 00:20:60 toamalom 0 p 6 0 0 0 EXHIBIT A Legal Description ,Tract B, Heritage Woods That portion of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington, more particularly described as follows: Commencing at the center of said Section 33 said point being a concrete monument with Brass Cap and Bears N 01 003'43" E, a distance of 2632.77 feet from the South Quarter corner (Monument in Case) of said Section 33; thence North 88023'27" West along the North line of the Northeast Quarter of the Southwest Quarter of said Section 33, a distance of 401.28 to the True Point of Beginning; thence continuing North 88023'27" West along said North line a distance of 10.00 feet to the Northeast corner of the Plat of Laurelwood North No.4 as recorded in Volume 87 of Plats, Page 8, records of King County, Washington; thence South 01 003'43" West along the East line of said Laurelwood North No. 4, a distance of 86.58 feet; thence South 63039'58" East, a distance of 125.56 feet to the beginning of a curve to the Right, radial to said line, having a radius of 50.00 feet and a central angle of 11032'13"; thence along said curve an arc distance of 10.07 feet to a point on the curve; thence North 63039'58" West, a distance of 120.23 feet; thence North 01 003'43" East a distance of 80.24 feet to the North line of the Northeast Quarter of the Southwest Quarter of said Section 33 and the True Point of Beginning. Containing 0.05 Acres, more or less. •r�i Q E•� Q x a 0 U z z A N A EW+ I, w y� P. a C E 0 4. A d 151. ra C- +,- C. v� v} us �fi v3 v� es v} ds r�bam,��S�A C/J i V] k y y vi L d Cd F � � [ w v p C Ri A A b o z° W ❑ ❑ ❑bJD I ❑ C C •� �! 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CDO rOi, f .� 3 — r r � ` Aa ^r EXHIBIT A Legal Description ,Tract A, Heritage Woods That portion of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington, more particularly described as follows: Commencing at the center of said Section 33 said point being a concrete monument with Brass Cap and Bears N 01 003'43" E, a distance of 2632.77 feet from the South Quarter corner (Monument in Case) of said Section 33; thence North 88023'27" West along the North line of the Northeast Quarter of the Southwest Quarter of said Section 33, a distance of 411.28 to the Northeast corner of the Plat of Laurelwood North No.4 as recorded in Volume 87 of Plats, Page 8, records of King County, Washington; thence South 01 003'43" West along the East line of said Laurelwood North No. 4, a distance of 571.94 feet; thence South 88056'17" East, a distance of 158.76 feet to the True Point of Beginning; thence continuing South 88056'17" East, a distance of 110.00 feet; thence South 75"43'52" East, a distance of 101.26 feet; thence North 22043'16" East, a distance of 110.00 feet to the beginning of a curve to the Left, radial to said line, having a radius of 50.00 feet and a central angle of 26005'28"; thence along said curve an arc distance of 22.77 feet; thence South 03022'12" East radial to said curve, a distance of 115.00 feet; thence North 72035'58" East, a distance of 104.94 feet; thence North 37049'56" East, a distance of 156.77 feet; thence North 28034'07" East, a distance of 82.65 feet; thence North 01 036'33" East, a distance of 217.21 feet to a point on a curve to the Right from which the radius point bears South 03026'35" West, having a radius of 250.00 feet and a central angle of 26004'15"; thence along said curve, an arc distance of 113.76 feet; thence South 29030'49" West radial to said curve, a distance of 110.00 feet; thence South 50043'32" East, a distance of 50.00 feet; thence South 28010'38" East, a distance of 55.00 feet; thence South 17019,43" East, a distance of 65.50 feet; thence South 16056'07" East, a distance of 65.47 feet; thence South 05033'07" East, a distance of 60.00 feet; thence South 13042'53" West, a distance of 50.00 feet; thence South 70013'06" East, a distance of 110.00 feet to the beginning of a curve to the Right, radial to said line, having a radius of 300.00 feet and a central angle of 15035'38"; thence along said curve an arc distance of 81.65 feet; thence South 35022'32" West tangent toaid curve, a L � O --At distance of 62.00 feet; thence North 54037'28" West, a distance of 145.00 feet; thence North 73011'00" West, a distance of 124.54 feet; thence South 72009'04" West, a distance of 133.84 feet; thence South 72009'04" West, a distance of 60.00 feet; thence North 89036'02" West, a distance of 69.23 feet; thence South 17°31'41" East, a distance of 110.02 feet to the beginning of a curve to the Left, radial to said line, having a radius of 50.00 feet and a central angle of 57024'46'; thence along said curve an arc distance of 50.10 feet; thence North 74056'27" West radial to said curve, a distance of 109.74 feet; thence North 88056'17" West, a distance of 110.00 feet; thence North 01 003'43" East, a distance of 248.49 feet to the True Point of Beginning. Containing 4.10 Acres, more or less. •'E'WAS ` �F, VA L LAND a- I I i L ry d c rJ a.' b C u 63 LW C ,d Gi i CD r 1,2 o A a m Z c G O f Cj L Cd y � G W y aoi O o � C e � q A 0 z 0 ❑ b�. • O y p� B A c ❑ ❑ ❑ ❑�o �U 0 �� p oU C �O caCIS �3 U 00bb DM �� aU '�� ❑ ❑❑ a d oo b y w N W1r• o. o o w w on C13kccz�nrn EL ?? '> r F' C) L m. 2, o r� U U U ca W O Lx Ct C❑ ❑ C❑❑ o O s� Cu �. o - o "O r4 (I a wyy � cam+ *U4 �u z A �c� zc A N 4 ti p P o a'�•�� 00 V O_C O 2-0 w N�2E7 G OU U rn 00 ° �r"'" �S 3 c o o� w �� 3 0. ; G 40 .= u c c W U C'•'La—� z d r U P E �^H E O TN6 •b z •o C tJ 12C C C0 C f3. o� El Z Q 7 h o CL O U C U O Z C N -O C GA v C ovjo° oafno o L Fa u Q apa� A N M C N eE UC." O C N NO 3 w EQ a > m4t�C�.� w A w U U C L ,zh H z q o 2) 42) a o U w ° w N ro N� v 3a��am es a •�. a 3 .. a ca 00., O O O Opp .00 o 0 b a�i c � as U 00 co �o a E� z o W �• . 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Cb CD C7 SO fG b _�h C ram+ �►+ CD C' +•• A O M A a �-� �.CD CD cw w co (IQ �' C CD ol cn CD 01 x .� EXHIBIT A Legal Description, Roads, Hertage Woods That portion of Section 33, Township 22 North, Range 4 East, W.M., in King County, Washington, more particularly described as follows: Commencing at the center of said section 33, said point being a concrete monument with Brass cap and Bears North 01 °03'43" East, a distance of 2632.77 feet from the South Quarter corner (Monument in Case) of said Section 33; thence South 88023'41" East along the North line of the Southeast Quarter of said Section 33, a distance of 1183.23 feet to the Westerly margin of New Military Road; thence South 35022'32" West along said Westerly margin, being 50.00 feet at right angles thereto the centerline of said New Military Road South, a distance of 716.35 feet to the True Point of Beginning and the beginning of a curve to the Right tangent to said line having a radius of 25.00 feet and a central angle of 79003'13"; thence an arc distance of 34.49 feet along said curve to a point of reverse curve to the Left from which the radius point bears South 24025'45" West, having a radius of 778.39 feet and a central angle of 10043'55"; thence an arc distance of 145.80 feet along said curve to a point of reverse curve to the Right from which the radius point bears North 13041'51" East, having a radius of 25.00 feet and a central angle of 78028'43'; thence an arc distance of 34.24 feet along said curve to a point of reverse curve to the Left from which the radius point bears North 87049'26" West, having a radius of 350.00 feet and a central angle of 19030'17"; thence an arc distance of 119.15 feet along said curve ; thence North 17019'43" West tangent to said curve, a distance of 117.91 feet to the beginning of a curve to the Left tangent to said line having a radius of 300.00 feet and a central angle of 27031'28"; thence an are distance of 144.12 feet along said curve to a point of reverse curve to the Right from which the radius point bears North 45008'48" East, having a radius of 25.00 feet and a central angle of 70000'31 "; thence an arc distance of 30.55 feet along said curve to a point of reverse curve to the Left from which the radius point bears North 64050'41" West, having a radius of 200.00 feet and a central angle of 59018'39'; thence an arc distance of 207.03 feet along said curve ; thence North 34°09'20" West tangent to said curve, a distance of 238.74 feet; thence South 53°34'04" West, a distance of 50.04 feet; thence South 34009'20" East, a distance of 236.76 feet to the beginning of a curve to the Right tangent to said line having a radius of 150.00 feet and a central angle of 50021'47"; thence an arc distance of 131.85 feet along said curve to a point of compound curvature having a radius of 25.00 and a central angle of 10003819"; thence an arc distance of 43.91 feet to a point of reverse -curve to the Left from which the radius point bears South 26050'46" West, having a radius of 300.00 feet and a central angle of 25014'13"; thence an arc distance of 132.14 feet along said curve ; thence North 88023'27" West tangent to said curve, a distance of 52.81 feet to the beginning of a curve to the Right tangent to said line having a radius of 25.00 feet and a central angle of 81 °33'58"; thence an arc distance of 35.59 feet along said curve to a point of reverse curve to the Left from which the radius point bears South 83010'31" West, having a radius of 50.00 feet and a central angle of 163007'57'; thence an arc distance of 142.36 feet along said curve to a point of reverse curve to the Right from which the radius point bears North 79057'25" West, having a radius of 25.00 feet and a central angle of 81 °33'58'; thence an arc distance of 35.59 feet along said curve; thence North 88023'27" West tangent to said curve, a distance of 52.44 feet to the beginning of a curve to the Left tangent to said line having a radius of 300.00 feet and a central angle of 33056'58'; thence an arc distance of 177.76 feet along said curve to a point of reverse curve to the Right from which the radius point bears North 32020'25" West, having a radius of 25.00 feet and a central angle of 104048'15'; thence an arc distance of 45.73 feet along said curve to a point of reverse curve to the Left from which the radius point bears South 72027'50" West, having a radius of 50.00 feet and a central angle of 233024'11'; thence an arc distance of 203.69 feet to a point of reverse curve to the Right from which the radius point bears South 19003'39" West, having a radius of 25.00 feet and a central angle of 104048'15"; thence an arc distance of 45.73 feet along said curve to a point of reverse curve to the Left from which the radius point bears South 56008'06" East, having a radius of 300.00 feet and a central angle of 25028'30'; thence an arc distance of 133.39 feet along said curve to a point on the curve; thence North 86039'24" East, a distance of 51.29 feet to the beginning of a curve to the Right from which the radius point bears South 79013'08" East, having a radius of 250.00 feet and a central angle of 80049'41 "; thence along said curve, an arc distance of 352.68 feet; thence South 88023'27" East tangent to said curve, a distanc,%€.DB.63 feet to the DRY- Vk 1 �; • GISTER. • �� �144 DNAL LANQ �' 2 beginning of a curve to the Right tangent to said line having a radius of 25.00 feet and a central angle of 90000'00"; thence an arc distance of 39.27 feet along said curve; thence South 01 036'33" West tangent to said curve, a distance of 124.75 feet to the beginning of a curve to the Right tangent to said line having a radius of 125.00 feet and a central angle of 43°46'04"; thence an arc distance of 95.49 feet along said curve to a point of compound curvature having a radius of 25.00 and a central angle of 70031'44' ; thence an arc distance of 30.77 feet to a point of reverse curve to the Left from which the radius point bears South 25054'21" West, having a radius of 50.00 feet and a central angle of 250031'43"; thence an arc distance of 218.63 feet; thence North 45022'37" East tangent to said curve, a distance of 70.71 feet to the beginning of a curve to the Left tangent to said line having a radius of 175.00 feet and a central angle of 43046'04"; thence an arc distance of 133.68 feet along said curve; thence North 01 036'33" East tangent to said curve, a distance of 124.75 feet to the beginning of a curve to the Right tangent to said line having a radius of 25.00 feet and a central angle of 90000'00"; thence an arc distance of 39.27 feet along said curve ; thence South 88023'27" East tangent to said curve, a distance of 77.00 feet to the beginning of a curve to the Right tangent to said line having a radius of 250.00 feet and a central angle of 71 °03'44'; thence an arc distance of 310.07 feet along said curve; thence South 17019'43" East tangent to said curve, a distance of 117.91 feet to the beginning of a curve to the Right tangent to said line having a radius of 300.00 feet and a central angle of 42034'58' thence an arc distance of 222.96 feet along said curve; thence South 64044'45" East radial to said curve, a distance of 50.00 feet to the beginning of a curve to the Left, radial to said line, having a radius of 350.00 feet and a central angle of 6010'56"; thence along said curve an arc distance of 37.76 feet to a point of reverse curve to the Right from which the radius point bears South 70055'41" East, having a radius of 25.00 feet and a central angle of 85006'49"; thence an arc distance of 37.14 feet along said curve to a point of compound curvature having a radius of 718.39 and a central angle of 8028'49'; thence an arc distance of 106.33 feet to a point of compound curvature having a radius of 25.00 and a central angle of 102042'35'; thence an arc distance of 44.82 feet to a point on the curve; thence North 35022'32" East, a distance of 112.37 feet to the True Point of Beginning. Containing 3.IG Acres, more or less. 3