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15-102033Flit lt",4 . Fx. 253-896-101, Fx. 253_896-2633 Mr. Joe Yoon 31()o8 - 39th PI SW Federal Way, WA 98335 RESUBMITTED FE8 13 C OF UNr7Y REV S IMEhT GeoResources, .LLC 5007 Pacific Hwy E. Suite 16 Fife, Washington 98402-2462 November 11, 2016 Updated February 3, 2017 Geotechnical Report - Update 2 Shoreline Restoration - Bulkhead Repair 310o8 - 39th PI SW Federal Way, Washington Job No: Yoan.39thPISW.RGu2 This updated geotechnical reportINTRODUCTION TRzee obsery our subsurface explorations, and provides geotechnical recomme the shoreline slope area and repair of the existing but fair observations ions multiple site visits that based on the City of Federal Way requirements recommendations far restoration of block walls and return the shoreline slope area to the on ling rock bulkhead. We understand You have decided to We the tailed slope with a walking path. Both the bulkhead repair and ghe s! onfiguration of a vegetated concurrently. Grading plans are provided separately. We received review comments from GeaDesl slope restoration will occur updated code sections to the Revised FWRC 15.05 code. Chapter, Specific to shoreline areas, includinggn dated September 27, 2g16 and have Chapter 19 [Section 05.070) a discussionldefinition of critical areas, tsimion �arto 030) is The general location of the site is illustrated on Figure 1, The County Website) is included on Figure 2a with the exploration configuration with the new site topography {King path location is included as Figure 2bc Full sheet plans ons. The Proposed re d slope Provided separately, as requested. The historic (1970sj site development Figure 2c, an aerial photograph {WDOE being The lower failed block wall was situated above the existingel0pment is illustrated on settler! over time, although we understand that the majority last two years associated with significant storm events, rack bulkhead that has apply for permits to repair the rock bulkhead at the °f the settlement occurred in the We understand that the Pre-existing block r Based on our discussions, years ago to replace creosoted timber wallsblock (railroadsame tome as the slope restoratiq a will staining walls were constructed several Unfortunately, the wall designer andlor contractor did not ac inform you that the ties} that were decomposing y were needed. You were notified b the City and failing. the necessary acquire the necessary permits, or and are currently n a state of collawere not in pse. The walls began to fail shortly after of Federal Way in 2014 that Path have been rejected by the City p Efforts to Permit the reconstruction of the walls and have elected to regrade the slope without the walls and red and to manage costs and coin returning the impervious surface area to less than the original complete the project, you Provide the necessary lateral support for the restored S r ace the path dimensions, repaired and function as a toe buttress. 1974s configuration. dTo pe area, the failing bulkhead will be The Yoons — 39th PI SW February 3, 2017 Page 2 SITE CONDITONS The subject site is situated along the northwest shoreline in the City of Federal Way, Washington. The existing residence is located in an established shoreline residential area that is situated near the top of a moderately sloping shoreline bluff area. The ground surface east of the site continues to slope up towards the Federal Way upland area at between 10 and 50 percent. The shoreline bluff slope at the site ranges from 30 to 50 percent with isolated steeper areas, and approximately 45 feet of vertical relief. The slope area was previously terraced in the 1970s' with landscape timbers (railroad ties) with a beach access pathway. We understand that the aging timbers were replaced with masonry block walls with a reconfigured (flatter) pathway several years ago. The slope areas between the walls/path were vegetated with ornamental grasses and shrubs. Because the appropriate permits were not acquired for that work, a violation was issued by the City in 2014, at approximately the same time as you observed portions of the block walls beginning to settle and fail. Currently the block walls have collapsed onto the vegetation and path. As indicated above, the current proposal is to repair the failing bulkhead and regrade the slope area to approximately the 1970s vegetated slope configuration with a reduced beach access path. This will result in a reduction in the amount of impervious surface area. To accomplish this, the failing bulkhead will be repaired to provide lateral support for the upslope area, and the existing wall blocks will be removed from the slope area, as well as the path pavers. Once grading of the slope is complete, a switch -back path using a portion of the existing pavers will be constructed as illustrated on the Site Plan, Figure 2b. There will be no changes in drainage conditions from the residence or the upper landscape areas. No seepage was observed at the surface of the site at the time of our site visit. Therefore there will be no upslope drainage impacts to the slope area. The pavers are generally considered pervious because of the joint patterns and sand backfill. Site Soils The USDA Natural Resource Conservation Service (NRCS) Web Soil Survey for King County maps the soils underlying the lower portion of the site as Alderwood gravelly sandy loam and Alderwood and Kitsap soils (AkF), and Ragnar fine sandy loam (RaD) in the upper portion of the site. The Alderwood and Kitsap soils are derived from glacial till and/or glacial outwash that form on 25 to 70 percent slopes. These soils are listed as having a "moderate to severe" erosion hazard limitation for building. These soils are listed in hydrologic soils group C. The Ragnar soils are identified as Terrace deposits that occur on slopes of 6 to 15 percent, with a slight to moderate erosion hazard. A copy of the SCS map for the site vicinity is attached as Figure 3. Site Geology The draft Geologic Map of the Tacoma North 7.5-minute Quadrangle, Washington, by Troost, K. G., Booth, D. B., and Borden, R. K. indicates the site underlain by glacial till and deposits with fill material to the south. The till soils were deposited during the Vashon stade of the Fraser Glaciation, some 12,000 to 15,000 years ago. The till deposits consist of poorly sorted, unstratified mixtures of silt, sand and gravel that were deposited below the advancing and receding ice mass. The till was overridden by the ice mass, and as such is considered overconsolidated. These soils are in a very dense condition, and exhibit high strength and low compressibility characteristics where undisturbed. The fill material was likely placed during the early 1900's during a mass grading operation prior to the existing residential development. The fill material appears to consist of mostly sand with variable silt and minor gravel. Since that time, the shallow soils have been The Yoons — 39th PI SW February 3, 2017 Page 3 weathered to a loose to medium dense condition. No areas of landslides or mass wasting are noted on the map within the immediate vicinity of the site. An excerpt of the above referenced map is included as Figure 4. The Department of Ecology Coastal Atlas maps the southeast, upper portion of the site as being "stable," while the area two parcels to the east of the site is mapped as being "unstable." This is likely due to the height and inclinations of the slopes. No areas in the site vicinity are mapped as Uos or Urs. A copy of the Coastal Zone map for the site area is included as Figure 5. Oblique aerial photographs from the Department of Ecology web site for the area are included as figures 6a through 6d. Subsurface Conditions We previously completed two hand auger explorations behind the existing block walls at the site, prior to their failing. The explorations extended from approximately 9 feet to 10 feet below the adjacent ground surface. The soils encountered ranged from 8 to 12 inches of crushed rock, over fine to medium sand with fine gravel and variable silt content. Hand auger HA-2 also encountered a higher silt content to about 5 feet, and a thin silt lens below 5 feet, before encountering the cleaner sand with minor gravel. No evidence of groundwater seepage was observed in HA-2, but minor seepage was encountered in HA-1 at a depth of 7.5 feet, extending to the full depth explored. The location of the hand augers is illustrated on the Site Plan, Figure 2a. The soil classification methodology is provided in Figure 7. Logs of the conditions encountered are included in Figure 8. GEOLOGIC HAZARDS The City of Federal Way Critical Areas Ordinance for Geologically Hazardous Areas (Chapters 15 and 19 within the shoreline area and outside of the shoreline area, respectively) states "geologically hazardous areas shall mean areas that, because of their susceptibility to erosion, landsliding, seismic or other geological events, are not suited to sitting commercial, residential or industrial development consistent with public health or safety concerns." Landslide Hazard Areas per Federal Way Revised Code The Federal Way City Code defines landslide hazard areas as "those areas potentially subject to episodic downslope movement of a mass of soil or rock including but not limited to the following areas: a. Any area with a combination of., 1. Slopes greater than 15 percent; 2. Permeable sediment overlying a relatively impermeable sediment or bedrock; 3. Springs or groundwater seeps. b. Any area which has shown movement during the Holocene epoch, from 10, 000 years ago to the present, or which is underlain by mass wastage debris of that epoch. c. Areas potentially unstable as a result of rapid stream incision, stream bank erosion, and undercutting by wave action. d. Areas located in a canyon or on an active alluvial fan, presently or potentially subject to inundation by debris flows or catastrophic flooding. e. Areas that have a "severe" limitation for building site development because of slope conditions, according to the USDA SCS. The Yoons — 39th PI SW February 3, 2017 Page 4 F. Those areas mapped as Class U (Unstable), Uos (Unstable old slides), and Urs (unstable recent slides) by the Department of Ecology. g. Slopes having a gradient steeper than 80 percent subject to rock fall during seismic shaking" From the above listed indicators we offer the following comments. The slopes on the site are steeper than 15 percent but have no adverse geologic or soil contacts and no evidence of seeps was noted during our site visits. No evidence of recent or Holocene epoch movement is shown on the published geologic map, nor was any evidence of recent landslide activity noted during our site visit. No surface water was observed to be flowing on the site. No area of alluvial fans was noted or was observed on or within the vicinity of the subject site. The Alderwood-Kitsap soils mapped on the lower steeper portion of the site are listed as having a moderate erosion hazard when exposed by the USDA Soil Conservation Service. No areas of Uos or Urs were mapped in the site vicinity. Based on our observations and literature review, the lower portion of the site meets the technical definition of a landslide hazard area because the slope inclination. The site meets no other criteria per the FWRC. Seismic Hazards per Federal Way Revised Code The City of Federal Way Municipal Code defines seismic hazard areas as "those areas subject to severe risk of earthquake damage as a result of seismically induced ground shaking, slope failure, settlement or soil liquefaction, or surface faulting. These conditions occur in areas underlain by cohesionless soils of low density usually in association with a shallow groundwater table." Characterization of soil profile type is required to determine the site class definition. Based on the inferred range of likely Standard Penetration Test (SPT) values encountered in our hand auger explorations, it is our opinion that the project site can be adequately classified as a Site Class D. CONCLUSIONS Based on our site observations, data review, subsurface explorations and experience in the site area, it is our opinion that regrading the slope area to a 2H:1 V or flatter configuration with a shoreline access path can be achieved using conventional construction methods with the existing soils and paver materials at the site. Further, it is our opinion that an active landslide hazard, erosion hazard area, or a seismic hazard area do not exist on or near the site. However, portions of the site do meet the landslide (previous steep slope) hazard criteria. The failing block walls at the site are the result of the failing bulkhead and poor construction techniques. The block walls will be removed from the slope area. The reduction in the paver sitting and path areas will reduce the overall impervious surface area in the shoreline slope area, the goal being to return to or be less than the historic 1970s surface area, less than 495 square feet. Geologic Hazard Criteria - per City of Federal Way Code Erosion Hazards The site soils are mapped as RaD and AkF, which have a slight to moderate erosion hazards when exposed, respectively. Conventional construction BMP's should be installed prior to beginning construction and soil not worked for more 7 days during wet weather conditions should be covered with plastic sheeting or mulch. Temporary erosion control should consist of a silt fence along the downslope side and side slopes of the active The Yoons — 39th PI SW February 3, 2017 Page 5 construction area. Provided standard BMP's are installed prior to beginning construction, the potential for erosion or sediment leaving the site should be minimal. Permanent mitigation for erosion will consist of the repair of the existing rock bulkhead at the toe of the slope, as well as the revegetation of the slope with native plant species in accordance with the accompanying plan sheet C-3. Soils on the slope will also be amended using one of the three options listed on the accompanying sheet C-4. Landslide Hazards The site has slopes steeper than 15 percent, but no adverse or intersecting contracts are mapped on the site, nor were any seeps or springs noted at the surface at the time of our site visits. No areas of mapped landslide debris or activity were noted on the published USGS geologic map or coastal zone atlas at the site. No areas of alluvial fans are mapped nor were any alluvial fans noted in the vicinity of the site at the time of our past site visits. The site soils (RaD and AkF) as mapped by the USCS have a slight to moderate erosion hazard when exposed. The site is mapped as being stable by the Department of Ecology Coastal Atlas. No areas of historic or recent landslide activity were identified on the Coastal Atlas or the geologic map for the area. The shoreline area two parcels to the east is mapped as unstable by the DOE Coastal Zone Atlas. Based on our observations and literature review, the site does have slopes steeper than 15 and 40 percent. As previously stated, we observed no evidence of active or ongoing landslides hazards were observed on the site or near the site. The failed walls are simply that, not slope failures. It is our opinion that the failed walls are the result of the failing bulkhead, and poor design and construction that was not in accordance with the standards of practice in the Puget Sound area. In our opinion, the site does not constitute an active landslide hazard area. Therefore, no prescriptive buffer should be imposed by the City of Federal Way. Seismic Hazards The Federal Way City Code defines seismic hazard areas as those areas subject to severe risk of earthquake damage as a result of seismically induced ground shaking, slope failure, settlement or soil liquefaction, or surface faulting. These conditions occur in areas underlain by cohesionless soils of low density usually in association with a shallow groundwater table. Based on our observation and the subsurface units mapped at the site, we interpret the structural site conditions to correspond to a seismic Site Class "D" in accordance with Chapter 20 of ASCE 20. This is based on out hand probes within the hand auger holes and the likely range of equivalent SPT (Standard Penetration Test) blow counts for the soil types mapped in the site area, as well as the lack of groundwater. These conditions were assumed to be representative for the conditions based on our experience in the vicinity of the site. These soils are not prone to liquefaction and do not constitute a seismic hazard area. Given the mapped stratigraphy of till deposits, which was overridden by the Vashon stade of the Fraser Glaciation, it is our opinion that the potential for liquefaction is low. Steep Slope Hazards The Federal Way City Code defines steep slope hazard areas as those with a slope of 40 percent or greater with a vertical relief of 10 or more feet, a vertical rise of 10 or more feet for every 25 feet of horizontal distance. Based on our observations the site appears to meet these characterizations in the lower area of the existing unpermitted/failing walls. Permanent stabilization of this area will include removing the failing walls, grading the slope in accordance with the "Site Preparation and Grading -Slope Area" section below, The Yoons — 39th PI SW February 3, 2017 Page 6 amending the soils on the slope using one of the three options listed on the accompanying sheet CA and revegetation of the slope with native plant species in accordance with the accompanying plan sheet C-3. Bulkhead Repair The existing but failing bulkhead at the site will be repaired to provide a toe buttress for the upslope portion of the site. The proposed bulkhead repair will be completed with large angular rockery rock embedded appropriately, with drainage material, separation fabric and chinking. Conventional construction methodology will be utilized for the repair. It is our professional opinion that the failing bulkhead at the shoreline below the site is allowing active erosion as a result of wave and tidal energy, effectively over topping, undercutting and lack of appropriate chinking. The failing bulkhead resulted in the loss of lateral support for the upslope areas where the block walls existed, resulting in them also failing. It is our opinion that without repair, the upslope slope area at the site and on the adjacent properties are at risk of further failure and damage. The proposed rock bulkhead repair will have no adverse impact on the adjacent properties, as they already have bulkheads. In fact, the repaired bulkhead will prevent damage to the adjacent properties and their improvements located in the shoreline area. Site Preparation and Grading - Slope Area The proposed regrading of the slope area on the site will require the removal or stripping of the existing vegetation, organic rich surface soils, and other deleterious materials including existing structures and blocks (wall and pathway). Organic topsoil is not suitable for use as structural fill, but may be used for limited depths in non-structural areas. Stripping depths ranging from 2 to 8 inches should be expected to remove these unsuitable soils. Areas of thicker topsoil or organic debris may be encountered in areas of heavy vegetation or depressions. Where placement of fill material is required, the stripped/exposed subgrade areas should be compacted to a firm and unyielding surface prior to placement of fill material. Excavations for debris removal should be backfilled with structural fill compacted to the densities described in the "Structural Fill" section of this report. We recommend that a member of our staff verify the exposed subgrade conditions after excavations are completed and prior to placement of structural fill. The exposed subgrade soil should be proof -rolled and compacted to a firm and unyielding condition. We recommend that trees be removed by overturning in fill areas so that a majority of the roots are removed. Excavations for tree stump removal should be backfilled with structural fill compacted to the densities described in the "Structural Fill" section of this report. Soft, loose or otherwise unsuitable areas delineated during proof -rolling or probing should be recompacted, if practical, or over -excavated and replaced with structural fill. The depth and extent of over -excavation should be evaluated by our field representative at the time of construction. The areas of fill should be evaluated during grading operations to determine if they need mitigation; re -compaction or removal. Structural Fill All material placed as fill associated with grading in the slope area should be placed as structural fill. The structural fill should be placed in horizontal lifts of appropriate thickness to allow adequate and uniform compaction of each lift. The fill should be benched into the undisturbed native soils, generally vertical benches of 3 to 4 feet are utilized, with construction starting at the toe of the slope. Fill should be compacted to at least 95 percent The Yoons — 39th PI SW February 3, 2017 Page 7 of MDD (maximum dry density as determined in accordance with ASTM D-1557). The appropriate lift thickness will depend on the fill characteristics and compaction equipment used. We recommend that the appropriate lift thickness be evaluated by our field representative during construction. We recommend that our representative be present during site grading activities to observe the work and perform field density tests. The suitability of material for use as structural fill will depend on the gradation and moisture content of the soil. As the amount of fines (material passing a US No. 200 sieve) increases, soil becomes increasingly sensitive to small changes in moisture content and adequate compaction becomes more difficult to achieve. During wet weather, we recommend use of well -graded sand and gravel with less than 5 percent (by weight) passing the US No. 200 sieve based on that fraction passing the 3/4-inch sieve, such as Gravel Backfill for Walls (WSDOT 9-03.12(2)). If prolonged dry weather prevails during the earthwork and foundation installation phase of construction, higher fines content (up to 10 to 12 percent) may be acceptable. Material placed for structural fill should be free of debris, organic matter, trash and cobbles greater than 6-inches in diameter. The moisture content of the fill material should be adjusted as necessary for proper compaction. Suitability of On -Site Materials as Fill During dry weather construction, non -organic on -site soil may be considered for use as structural fill; provided it meets the criteria described above in the "Structural Fill" section and can be compacted as recommended. If the soil material is over -optimum in moisture content when excavated, it will be necessary to aerate or dry the soil prior to placement as structural fill. We generally did not observe the site soils to be excessively moist at the time of our subsurface exploration program. The native recessional outwash soils in the site area generally consist of sand with minor gravel and varying trace amounts of silt. These soils are generally comparable to "sandy pit run" material and will be suitable for use as structural fill provided the moisture content is maintained within 3 percent of the optimum moisture level. In the Puget Sound area, wet weather generally begins about mid -October and continues through about May, although rainy periods could occur at any time of year. Most of the soils at the site appear to contain sufficient fines to produce an unstable mixture when they become over -optimum in moisture. Such soil is highly susceptible to changes in water content and tends to become unstable and difficult or impossible to proof -roll and compact if the moisture content significantly exceeds the optimum. In addition, during wet weather months, the groundwater levels could increase, resulting in seepage into site excavations. Performing earthwork during dry weather would reduce these problems and costs associated with rainwater, construction traffic, and handling of wet soil. We recommend that requirements for wet weather/wet construction for the earthwork portion of the project be incorporated into your contract specifications. Once grading is completed in the slope area, and the paver path is completed, the disturbed areas should be revegetated or otherwise erosion protected, and landscaped as proposed. LIMITATIONS Within the limitations of scope, schedule and budget, our services have been executed in accordance with generally accepted practices in this area at the time this report was prepared. A contingency for unanticipated conditions should be included in the budget and schedule. Sufficient monitoring, testing and consultation should be provided by our firm The Yoons — 39th PI SW February 3, 2017 Page 8 during construction to confirm that the conditions encountered are consistent with those indicated by the explorations, to provide recommendations for design changes should the conditions revealed during the work differ from those anticipated, and to evaluate whether earthwork and foundation installation activities comply with contract plans and specifications. The scope of our services does not include services related to environmental remediation and construction safety precautions. Our recommendations are not intended to direct the contractor's methods, techniques, sequences or procedures, except as specifically described in our report for consideration in design. If there are any changes in the loads, grades, locations, configurations or type of facilities to be constructed, the conclusions and recommendations presented in this report may not be fully applicable. If such changes are made, we should be given the opportunity to review our recommendations and provide written modifications or verifications, as appropriate. The Yoons — 39th PI SW February 3, 2017 Page 9 If you have questions or need additional information please contact us. We hope this satisfies your current needs. Respectfully submitted by, Brad P. Biggerstaff, LEG, LHG Principal 7 �. 1-Y P- ;=Y t BPB:DCB:bpb DoclD:Yoon.39thPISW .G Ru2 Attachments: Figure 1:Ycinhy Map Figure 2a: IGng County Topography with Exploration Locations Figure 2b: Site Plan with Proposed Grading Configuration Figure 2c: Site Aerial -1970 Figure 3: NRCS - SCS Map Figure 4: Geologic Map Figure S: Coastal Zone Agas Figure 6a-6d: Oblique Aerial Photos Figure 7: Soil Classification Table Figure 8: Hand Auger Logs Dana C. Biggerstaff, PE Sr. Engineer 11 �Y MAO.1 — BN>9eiN :S y� rmn yt n s ynlex � i L � f WI'i$rll S[ aY a�T'Ie G! {• PO r "AR146 ,V. QA '�' sr1' III U PN xdiII R 11 p� s 7w 1=1e iT Ar" a�rH� Puger Sound t GYvh1P_ SW 7056r , � FF1 'JX ti r[:! 7or}ll sT F ¢ 8W 21m Sr 2 ! i� _,r':' sY �iTr1ln I1tlIp pa A awumis l)inI PLa. l'a k� z . 2 svagrr.sr 3 S?. r110]e6nl j: �nrM^ �H�vsrrnlsv sw mrR.. �`` r` mDr1INR IP Al]Ildf'nT 9R jj K 55+71r 1� F SWhS1691 {/. 4 S y1q.]Imr W � . ry7� ry/p y,g111R ` � �J K � FIsA Pri Ade�d Pi rie • � n f s sysmasr,; -� rarer srare nrrk �� "� __ -� � �• �� + � � � r,. �ti '\\. � • JJl,•�G'• kNff6SL7M 7yY�frMaw7", YAYif"Op p[5l }' ` k �� 1 V 5` Baer ztv.vrFra � IJ` 00 Approximate Site Location (Map created from King County iMap http://www.kingcounty.gov/operations/GIS/Maps/iMAP.aspx) GeoResources, LLC 5007 Pacific Highway East, Suite 16 Fife, Washington 98424 Phone: 253-896-1011 Fax: 253-896-2633 Site Vicinity Map Bulkhead and Wall Repair 31008 - 39th Place SW Federal Way, Washington DocID: Yoon.39thPISW.F I April 2015 Not to Scale Figure 1 Iraq" Iwo f. 71 .41, �f • �,} , �. 3 t. z t a91 r �. -�r� � _ .i� � 1, •.x.��" r•, Y t L Y: Is- x iiCi. ntY '.a �1• ` Approximate Site Location (Map created from King County iMap http://www.kingcounty.gov/operations/GIS/Maps/iMAP.aspx) GeoResources, LLC 5007 Pacific Highway East, Suite 16 Fife, Washington 98424 Phone: 253-896-1011 Fax: 253-896-2633 Site Plan & Topography Bulkhead and Wall Repair 31008 - 39th Place SW Federal Way, Washington DocID: Yoon.39thPISW.F April 2015 Not to Scale Figure 2a f Photo dated July 26, 1977 taken from the Washington State Department of Ecology Costal Atlas website (https://fortress.wa.gov/ecy/coastalatias/tools/ShorePhotos.aspx?photo= KI N0677_l 17&vintage=1970) GeoResources, LLC 5007 Pacific Highway East, Suite 16 Fife, Washington 98424 Ph: (253) 896-1011 Fax: (253) 896-2633 Site Aerial-1977 Bulkhead and Wall Repair 31008- 39th PI SW Federal Way, Washington DocID: Yoon.39thPISW I April 2015 [ Figure 2c Approximate Site Location rman created from the USDA Natural Resource Conservation Service Web Soil Survey) Soil Hydrologic Soil Name Parent Material Slopes Erosion Hazard Type Soils Group Cb Coastal beaches - - - B / D RaD Ra nar fine sandy loam Terrace deposits 6 to 15 Slight to Moderate B AkF Alderwood and Kitsap soils Glacial till and/or outwash 4 -15 Moderate A GeoResources, LLC 5007 Pacific Highway East, Suite 16 Fife, Washington 98424 Phone: 253-896-1011 Fax: 253-896-2633 NRCS SCS Soils Map Bulkhead and Wall Repair 31008 - 39th Place SW Federal Way, Washington Not to Scale DocID: Yoon.39thPISW.F I April 2015 CM _ QVt Approximate Site Location An excerpt from the draft Geologic Map of the Tacoma North 7.5-minute Quadrangle Pierce County, Washington by Troost, K.G., Booth, D.B., and Borden, R.K., (in review) C2f Fill Qb Beach deposits Qvr Recessional outwash Qvt Glacial till Qua Advance outwash Not to Scale GeoResources, LLC 5007 Pacific Highway East, Suite 16 Fife, Washington 98424 Phone: 253-896-1011 Fax: 253-896-2633 USGS Geologic Map Bulkhead and Wall Repair 31008 - 39th Place SW Federal Way, Washington DocID: Yoon.39thPISWX April 2015 _ QVt Approximate Site Location An excerpt from the draft Geologic Map of the Tacoma North 7.5-minute Quadrangle Pierce County, Washington by Troost, K.G., Booth, D.B., and Borden, R.K., (in review) C2f Fill Qb Beach deposits Qvr Recessional outwash Qvt Glacial till Qua Advance outwash Not to Scale GeoResources, LLC 5007 Pacific Highway East, Suite 16 Fife, Washington 98424 Phone: 253-896-1011 Fax: 253-896-2633 USGS Geologic Map Bulkhead and Wall Repair 31008 - 39th Place SW Federal Way, Washington DocID: Yoon.39thPISWX April 2015 Approximate Site Location Map created from the Washington State Department of Ecology Coastal Atlas website (https://fortress.wa.gov/ecy/coastalatias) El Drift cells O �! Divergence zone ._.� [_eft to right No appreciable drift 11� Right to left ti✓ Undefined GeoResources, LLC 5007 Pacific Highway East, Suite 16 Fife, Washington 98424 Phone: 253-896-1011 Fax: 253-896-2633 0 Slope stability 0 C� stable Intermediate Modified Unstable Unstable Cold slide) Unstable (recent slide) Coastal Zone Atlas Bulkhead and Wall Repair 31008 - 39th Place SW Not to Scale Federal Way, Washington DocID: Yoon.39thPISW.F April 2015 Figure 5 Approximate Site Location Photo dated July 26, 2006 taken from the Washington State Department of Ecology Coastal Atlas website (hft s://fortress.wa. ov/eclcoastalatlasitools/ShorePhotosCom areas x? hoto=060726 09133&vinta a=2006) GeoResources, LLC 5007 Pacific Highway East, Suite 16 Fife, Washington 98424 Phone: 253-896-1011 Fax: 253-896-2633 Not to Scale Oblique Shoreline Photographs Bulkhead and Wall Repair 31008 - 39th Place SW Federal Way, Washington DocID: Yoon.39thPISW.F i April 2015 Figure 6a f� Approximate Site Location Photo dated September 25, 2000 taken from the Washington State Department of Ecology Coastal Atlas website (httgs:Ilfortress.wa.govlecvlcoastalatlasltoois/ShorePhotosCom areas x? hoto=060726 09133&vintage=2006) GeoResources, LLC 5007 Pacific Highway East, Suite 16 Fife, Washington 98424 Phone: 253-896-1011 Fax: 253-896-2633 Not to Scale Oblique Shoreline Photographs Bulkhead and Wall Repair 31008 - 39th Place SW Federal Way, Washington DocID: Yoon.39thPISW.F April 2015 1 Figure 6b Approximate Site Location Photo dated May 19. 1993 taken from the Washington State Department of Ecology Coastal Atlas website (htt s://fortress.wa. ov/ec /coastalatles/tools/ShorePhotosCom areas x? hoto=060726 09133&vinta a=2006) GeoResources, LLC 5007 Pacific Highway East, Suite 16 Fife, Washington 98424 Phone: 253-896-1011 Fax: 253-896-2633 Not to Scale Oblique Shoreline Photographs Bulkhead and Wall Repair 31008 - 39th Place SW Federal Way, Washington 1 DocID: Yoon.39thPISW.F April 2015 Figure 6c Approximate Site Location Photo dated June 26, 1977 taken from the Washington State Department of Ecology Coastal Atlas website (htt s:llfortress.wa. ovlec /coastalatlas/tools/ShorePhotosCom areas x? hoto=060726 09133&vinta a=2006) GeoResources, LLC 5007 Pacific Highway East, Suite 16 Fife, Washington 98424 Phone: 253-896-1011 Fax: 253-896-2633 Not to Scale Oblique Shoreline Photographs Bulkhead and Wall Repair 31008 - 39th Place SW Federal Way, Washington DocID: Yoon.39thPISW.F I April 2015 1 Figure 50 Still CI _ASSIFICATION SYSTEM MAJOR DIVISIONS GROUP GROUP NAME SYMBOL GRAVEL CLEAN GW WELL -GRADED GRAVEL, FINE TO COARSE GRAVEL GRAVEL COARSE GP POORLY -GRADED GRAVEL GRAINED More than 50% SOILS Of Coarse Fraction GRAVEL GM SILTY GRAVEL Retained on WITH FINES No. 4 Sieve GC CLAYEY GRAVEL SAND CLEAN SAND SW WELL -GRADED SAND, FINE TO COARSE SAND More than 50% Retained on No. 200 Sieve SP POORLY -GRADED SAND More than 50% Of Coarse Fraction SAND SM SILTY SAND Passes WITH FINES No. 4 Sieve SC CLAYEY SAND SILT AND CLAY INORGANIC ML SILT CL CLAY FINE GRAINED SOILS Liquid Limit Less than 50 ORGANIC OL ORGANIC SILT, ORGANIC CLAY SILT AND CLAY MH INORGANIC SILT OF HIGH PLASTICITY, ELASTIC SILT More than 50% Passes CH CLAY OF HIGH PLASTICITY, FAT CLAY No. 200 Sieve Liquid Limit 50 or more ORGANIC OH ORGANIC CLAY, ORGANIC SILT HIGHLY ORGANIC SOILS PT PEAT NOTES: 1. Field classification is based on visual examination of soil in general accordance with ASTM D2488-90. 2. Soil classification using laboratory tests is based on ASTM D2487-90. 3. Description of soil density or consistency are based on interpretation of blow count data, visual appearance of soils, and or test data. GeoResources, LLC 5007 Pacific Highway East, Suite 16 Fife, Washington 98424 Phone: 253-896-1011 Fax: 253-896-2633 SOIL MOISTURE MODIFIERS: Dry- Absence of moisture, dry to the touch Moist- Damp, but no visible water Wet- Visible free water or saturated, usually soil is obtained from below water table Soil Classification System Bulkhead and Wall Repair 31008 - 39th Place SW Federal Way, Washington DocID: Yoon.39thPISW.F I April 2015 Hand Auger HA-1 Location: Lower landing, immediately above bulkhead Approximate Elevation: 8 feet Depth (inches) Soil TVDe Soil Description 0 - 8 - Crushed rock fill 8 - 96 SW Tan to gray medium SAND with occasional gravel (loose, moist) (void at 68 inches with organics and gravel) 96 - 112 SW Gray medium SAND with occasional gravel and trace of silt (medium dense, saturated) Terminated at 112 inches below ground surface. Caving or minor heave in the bottom 18 inches. Groundwater observed at 96 inches bgs. Hand Auger HA-2 Location: South edge of upper landing, in landscape area Approximate Elevation: 18 feet Depth inches Soil Type Soil Description 0 - 14 - Bark and topsoil with roots 14 - 64 SM Gray lightly mottled silty fine sand (medium dense, moist to wet) 64 - 68 ML Lens of gray fine sandy silt (hard, moist) 68 - 117 SW Gray medium sand with trace gravel (loose, moist) Terminated at 117 inches below ground surface. No caving observed. No groundwater seepage observed. STM GeoResources, LLC 5007 Pacific Highway East, Suite 16 Fife, Washington 98424 Phone: 253-896-1011 Fax: 253-896-2633 Excavated on: March 23. 2015 Hand Auger Logs Bulkhead and Wall Repair 31008 - 39th Place SW Federal Way, Washington DocID: Yoon.39thPISW.F October 2016 Figure 8 CITY OF Federal Way CITY HALL 33325 8th Avenue South Federal Way, WA 98003-6325 (253) 835-7000 www. cityoffederalway.. com Jim Ferrell, Mayor February 17, 2017 Mr. Kevin Lamb GeoDesign Inc. 2501 Jefferson Avenue Tacoma, WA 98402 k1amb c ,ge es' ic.com FILE Re: File #15-102033-00-AD; GEOTECHNICAL 3RD PARTY CONSULTANT REVIEW Yoon Violation Resolution & Bulkhead Repair, 31008 39thPlace SW, Federal Way Dear Mr. Lamb: On February 13, 2017, the applicant Qoe Yoon) resubmitted geotechnical report revisions, for the Yoon Slope Violation and Bulkhead Repair (city file numbers16- 105951-SH and 16-105952-SE). Please advise if additional peer review fees are necessary to continue with your geotechnical third party review of the abovementioned file. If so, the applicant will be contacted for additional fee payments. The applicant's biologist is aiming to achieve the Department of Fisheries and Wildlife's authorized work window. An expedited review is greatly appreciated to resolve the ongoing shoreline violation. If you have any questions regarding this letter, please contact me at leila.wslla hb -a es ei offe eral-,va .coin, or 253- 835-2644. Sincerely, f illoughby-Oakes Associate Planner enc: Revised Geotechnical Study (Prepared by GeoResources LLC, February 3, 2017) c: Bill Rehe, Leon Consulting, sc1�e tr Icnn-environmcntaLcom Joe Yoon, Owner/Applicant, hsi=riQ ihnn,cn rm File #15-102033-00-AD Doc. LD. 75442 IN a - y� �•.. J�y` F'JL if ` HVI X s -- r- 4 I T--j f7f r 2 ° ? a u+ a i y� -•+ �~rr- .�r�*.^ir^t 54' SETBACK am z zjpm �P: ,- I * -4 - , ,40 � � Iw I Ado 9. � c _this � c m I''~ ;�- -6 �, ' ��. ,: r-r•- 1 _ (n o a t3. :r morn �a°G70 r �:� ��+ ��•J f r A'O xw 77 O CO N If l O Z L,� L Z G) l}7 + n � ~ Sat4V13011 vS _ a' = Yoort Shcrre:3ne P©tr rr. 31w8-39th Place SW sr _ - n°�+�ww• ►'°�• w dZ*M" CtN ,2 Fe'farcf% ��r ;rca �,� �F:.�(•}7 � aw+ � — lam— - - - ` .t ��.».. 4 7w•_yvffre _ w .ti r"d it , �; .� � ti .• .. - 4 ?•'• to � � �4�P ars�a_ cg• � �^dry` •� Ic Iol- is u 44W.4 1 oamma Pm - •-• I Yawn 5horplvC �Pih "n` I i'1 3141iB-3J�h PlaG4 :-W FMs9ti-�—� _ � . in�aa• w dmvo-m �► �9C°4f9i 5:4',V, :•:n r•, •,• nn $"NNW. NIL-... +' '•�'w 6•��1'!!6NNIf,:�s. A�kCIT Federal Way January 26, 2017 William G. Rehe Jr. Leon Consulting 8305 Dogwood Lane NW Gig Harbor, WA 98332 FILE CITY HALL 33325 8th Avenue South Federal Way, WA 98003-6325 (253) 835-7000 www. cityoffederalway.. com Jim Ferrell, Mayor Emailed: rehe a leonenvironmental.com RE: File #15-102033-AD (Ref. Files: 16-105951-SH/16-105953-SF); YOON SLOPE & BULKHEAD REPAIR Geotechnical Peer Review; 31008 391h Place SW, Federal Way Dear Mr. Rehe: Please find the enclosed peer review for 'Geotechnical Report - Update 2, Shoreline Restoration - Bulkhead Repair, 'prepared by GeoResOut'Ces. The city forwarded your request to our geotechnical consultant, GeoDesign Inc., after receiving the required fees. GeoDesign completed their technical review memorandum on January 20, 2017. The rnemo contains review comments on pages 3 and 4. Please have GeoResources, LLC submit three (3) copies of a revised report to the Permit Center with the enclosed resubmittal form. Public Works Development Services and Building Division comments will follow under a separate cover for city file no. 16-105953-SF. If you have any questions regarding your third -party review request, please contact me at 253-835-2644 or fella.willoughby-oakes@cityoffederalway.com. Sincerely Leila Willoughby -•Oak Associate Planner c: Ann Dower. Senior Engineering Plans Reviewer (w1enc.) b&; K-VL Peter Lawrence- Plans Examiner Hyongsop -.Joe' Yoon_ Email. hs'voon4iLvalux-,x n Arlene.) III Brad Biggerstaff. GeoResources LLC. Email: E311d11ri'AMINSOLINes.us (w/enc.) enc: GeoDesign Peer Review Memo Project Resubmittal Form I5-102033-AD Doc LD 7>104 ODES I GNuz September 27, 2016 City of Federal Way Department of Comn 33325 8' Avenue Soy _.. Federal Way, WA 98003 Attention: Leila Willoughby -Oakes, Associate Planner Geotechnical Engineering Services Peer Review File#15-102033-00-AD Yoon Shoreline Retaining Walls and Grading Violation 31008 39`h Place SW Federal Way, Washington GeoDesign Project: FederalWay-3-01 INTRODUCTION This letter presents a summary of our peer review of the geotechnical reports and background information regarding the proposed repair of unpermitted block retaining walls on the Yoon property located at 31008 39`h Place SW in Federal Way, Washington. Our scope of services is to provide third party review of the submitted geotechnical information, reports, and proposed construction plans for conformance with: Chapter FWRC 15.10 "Critical Areas" WRC 1 5.10.160 "Limitations" Geotechnical Report FWRC 15.05.040 General Development Standards (4)(b)(iii) UNDERSTANDING The northern boundary of the Yoon property is waterfront that abuts Dumas Bay in Puget Sound. The property contains "Shorelands" as defined in the FWRC and is categorized as "Shoreline Residential Environment." FWRC 15.05 is applicable to this site as it meets the definition of "Shorelands." The property slopes down to the waterfront from 391h Place SW. Portions of the slope from the north side of the house down to the waterfront are in excess of 40 percent and appear to meet the FWRC 15.05.030 "Steep Slope Hazard Area" definition and the FWRC 19.05.070 "Landslide Hazard" definition. A rock bulkhead is present along the shoreline of the Yoon property. Prior to July 2012, the backyard above the bulkhead included timber retaining wall elements for slope support adjacent to a path down to the shoreline and to support landscaping elements. 10700 Meridian Avenue North, Suite 402 1 Seattle, WA 98133 1 206.838.9900 www.geodesigninc.com We understand that between July 2012 and May 2013 Mr. Yoon completed landscaping improvements on the landward of the existing rock bulkhead. Creosote timber retaining walls were removed and portions of the slope between the back of the existing house and the rock bulkhead were re -graded. Retaining walls constructed with concrete masonry units ("Keystone" - type blocks) were used to support the re -grading and removal of the creosote timber retaining walls, and much of the re -graded ground surface behind the walls was surfaced with concrete pavers. The work was unpermitted and is classified as a Shoreline Modification. Since the work was completed, the retaining walls have deformed and portions of the walls have failed. Mr. Yoon is working with the City of Federal Way (City) to correct the unpermitted work. Mr. Yoon retained GeoResources, LLC to provide geotechnical services in accordance with FWRC 15.05.050 and to complete a design of replacement walls. Soundview Consultants was also retained by Mr. Yoon to provide a shoreline assessment that included defining the Ordinary High Water Mark (OHWM) on the Yoon property. DOCUMENT REVIEW As part of our scope of services, we reviewed the following documents: • Construction Plan Sheets C-0, C-1 A, C-1 B, C-2, C-3, C-4, C-5, and C-6, prepared by GeoResources, LLC, dated March 17, 2016. • GeoResources, LLC - Geotechnical Consultation, Grading Plan - Shoreline, Restoration and Block Wall Repair; 31008 39`h PI SW; Federal Way, Washington, dated March 15, 2016. Job Number: Yoon.39thPISW.L2. • GeoResources, LLC - Geotechnical Report - Update, Shoreline, Restoration and Block Wall Repair; 31008 39`h PI SW; Federal Way, Washington, dated March 10, 2016. Job Number: Yoon.39thPISW.RG2. • Soundview Consultants - Technical Memorandum, Ordinary High Water Delineation and Assessment, dated February 26, 2016. File Number: 1428.0001. • We also reviewed several site photographs provided by the City documenting the site conditions. REVIEW COMMENTS CHAPTER FWRC 15.10 "CRITICAL AREAS" Pertinent sections of Chapter 15.10 applicable to the geotechnical aspects of the project are 1 5.10.120 and 15.10.160. FWRC 15.10.120 The proposed location of the retaining walls, as indicated on the Construction Plan Sheets, appears to be within areas impacted by past grading and landscaping activities within the steep slope hazard area. The walls, if constructed properly, should reduce the erosion potential, improve slope stability, and minimize impacts to the area. We conclude the proposed work is in compliance with FWRC 15.10.120. �� a DESIGNY 2 FederalWay-3-01:092716 FWRC 15.10.160 "LIMITATIONS" GEOTECHNICAL REPORT The information provided in the GeoResources, LLC geotechnical report appears to address FWRC requirements that have;been revised. The report should be modified to(conform with the updated code. Additional information or revisions to the report are required as identified below: i • FWRC codes referring to FWRC Chapter 19 should be revised to acknowledge that FWRC Chapter 15.05 i I s applicable to this site and that the site has a "Steep Slope Hazard" in accordance with FWRC 15.05.030. • The submitted report was missing Page 6, please provide a complete report: • Page 7 - Design active earth pressures are provided for ground slope behind the wall up to 5 percent. Slopes shown on the plans between the wall appear to be in excess of 5 percent. Please provide updated recommendation to account for slopes in excess of 5 percent behind walls. ■ Page 8 - It appears that the proposed "needle" piling are being relied on to provide vertical and lateral load resistance for the wall. Please provide updated lateral pile capacity recommendations for the "needle pile" and indicate whether some of the piles will be battered in order to provide lateral resistance. • Page 8 - A passives pressure allowable equivalent fluid density of 300 pounds per cubic foot for material in front of the wall is recommended as well as neglecting the top 3 feet of passive resistance for lateral support of the wall. The wall is just above the OHWM and will be embedded below it. Please provide an update passive pressure to account for saturated conditions. FWRC 15.05.040 GENERAL DEVELOPMENT STANDARDS (4)(0)(111) (iii) New development on sites with steep slopes and bluffs is required to be set back sufficiently to ensure that shoreline stabilization is unlikely to be necessary during the life of the project as demonstrated by a geotechnical analysis. This section of the code requires sufficient setback to ensure that shoreline stabilization is unlikely to be necessary in the future. GeoResources, LLC indicates the rock bulkhead along the shoreline has settled and the owner plans on restoring it at a later time. Provided the bulkhead is restored to prevent erosion along the toe of the slope, we agree that the 15-foot setback from the OHWM should be sufficient. The proposed walls are classified as "Accessory Structures" (FWRC 19.05.190) and are permitted within the 50-foot shoreline setback as defined in FWRC 15.05.80. Accessory Structures within the shoreline setback are limited to any one structure covering less than 150 square feet, and no more than 300 square feet combined coverage. We estimated the wall footprint coverage as the width of a typical concrete masonry unit retaining wall block (1.5 feet) times the combined length of the walls; the proposed walls within the 50-foot shoreline setback have a combined coverage of approximately 464 square foot. A variance will be needed to construct the walls as being proposed. Alternatively, the upper wall could be moved upslope and out of the 50-foot shoreline setback, and the lower walls could be reconfigured to a shorter configuration to meet the 300 square foot criteria. A reinforced soil slope with a vegetated face may also be another alternative worth considering. iR.3!i DESIGN= 3 FederalWay-3-01:092716 We appreciate the opportunity to provide our services on this project. Please call if you have questions regarding this submittal Sincerely, GeoDesign, Inc. r Kevin J. b, P.E. Principal Engineer KJL:rc One copy submitted (via email only) Document ID: FederalWay-3-01-092716-geol.docx © 2016 GeoDesign, Inc. All rights reserved. MDESIGM �L14 ]. L� WA si �, .n� f� 29441 S701VAL� Signed 09/27/2016 FederalWay-3-01:092 716 January 10, 2017 Leila Willoughby -Oakes, Associate Planner City of Federal Way 33325 8th Avenue South Federal Way, WA 98003-6325 RE: Yoon- Bulkhead Height (SEPA/SH/SF) Dear Willoughby -Oakes, Thank you for your email. I appreciate all your hard work on this project! Soundview determined the Ordinary High Water Marks (OHWM) to be somewhere between 14' to 15' MLLW for Mr. Yoon's property. OHWM varies over the landscape because of natural variation and environmental factors. The easiest way to deal with this variation is to estimate the Ordinary High Water Line (OHWL). This can be done by connecting the individual OHWM to form a line or by averaging the OHWM. Because Soundview's OHW delineation report does not provide the individual elevations, I called Paul Anderson at Ecology to discuss the issue. Mr. Anderson said he would be fine with calling averaging the range of OHWM to calculate the OHWL at 14.5' MLLW. The figure provide by GeoResources shows a generic cross section for the repaired bulkhead. Remember, Mr. Yoon has agreed to relocate his bulkhead landward of OHW to reduce impacts to the upper intertidal zone. Beaches are not flat, but slope both waterward to landward and side to side. So based on the natural slope of the beach, for every increment you relocate a bulkhead landward, you will raise it accordingly. This will give the visual appearance of the bulkhead being taller that the existing bulkhead, when it is not. Using the agreed upon OWHL of 14.5' MLLW, Federal Way Revised Code (FWRC) 15.05.070(6)) would allow the repaired bulkhead to be up to 15.5' MLLW. We are proposing to meet FWRC 15.05.070(6)) or be slightly under the 15.5' MLLW elevation. For reference, the overall height would be similar to the concrete bulkhead on the southern property line. If you have any additional questions or comments please call me at 253-389-0712. Sincerely, Bill Rehe CITY OF ti Federal Way January 18, 2017 F,1LE 33325 8th Avenue South Federal Way, WA 98003-6325 (253) 835-7000 www.cityoffederalway.com Jim Ferrell, Mayor William G. Rehe Jr. Emailed: rehe;�_.leonenvironmental.com Leon Consulting 8305 Dogwood Ln. NW Gig Harbor, WA 98332 RE: File #15-102033-AD; YOON VIOLATION (SLOPE REHABILITATION & BULKHEAD REPAIR) Geotechnical Report Resubmittal; 31008 39`h Place SW, Federal Way Dear Mr. Rehe: Please find the city's peer review fee invoice enclosed in order to peer review `Geotechnical Report - Update 2, Shoreline Restoration - Bulkhead Repair' received December 16, 2016, prepared by GeoReSOUrces LLC for a new proposal on the slope and bulkhead repair (city file nos. 16-105951-SH, 16- 105952-SE and 16-105953-SF). The city requested GeoDesign Inc., the city's on -call consultant, to provide estimated review fees for the proposal and submitted documents (geotechnical report, JARPA application, narrative and engineering plan -set). The estimate for the new slope rehabilitation and bulkhead repair proposal is $800.00. Priory peer review fees paid have been drawn down by the work performed; however, additional fees remain outstanding for the review of plan resubmittals in March 2016 ($1,505.75). Please make out a check in the amount of $2,305.75, made payable to the City of Federal Way or contact the Permit Center at 253-835- 2607 to pay by phone. If any funds are not used, they will be returned to the applicant. Following receipt of the funds, the project planner will authorize the on -call consultant to begin their geotechnical review for your building permit, SEPA checklist, and shoreline exemption applications. If you have any questions regarding this letter or your third -party review request, please contact the at 253-835-2644 or leila.willoughby-oakes@cityoffederalway.com. Sincerely, 2a — 0 L�eii Willoughby -Oakes Associate Planner c: Hyongsop 'Joe' Yoon, 31008 39th Place SW, Federal Way. WA 98023_ Email: hslvooniRvahuo.eom (w/enc.) enc: GeoDesign, inc. Fee Determination Email (1/2017) Fee Invoice I >- 102033-00-AD Doc I D M06 7 WWI g ``77i -r December 14, 2016 Leila Willoughby -Oakes Associate Planner City of Federal Way Dept. of Community Development 33325 8th Avenue South Federal Way, WA 98003-6325 R0119D O EC 20�6 CA iy F' �FDPPL i1VAV L-L 4 �'~ RE: Yoon Shoreline Violation Resolution and Bulkhead Repair Project Dear Mrs. Willoughby -Oakes, Please find the attached application material for the Yoon Shoreline Violation Resolution and Bulkhead Repair Project. We are applying for a shoreline exemption under Washington Administrative Code (WAC) 173-27-040 (2)b. We feel the restoration of the disturbed slope to its previous configuration and the repair and rehabilitation of the existing bulkhead, to restore the structure to a state comparable to its original condition, meets the requirements for an exemption from substantial development pen -nit requirement. The repair of the existing bulkhead is needed to stabilize the toe of the slope so the restoration activities have a stable foundation to prevent movement to the hillside. We feel these repairs will not cause substantial adverse effects to the shoreline resources or environment. The proposed project was designed to reduce existing adverse impacts by restoring and reestablishing previously impacted habitat. The existing, legally established bulkhead was constructed several feet below Ordinary High Water (OHW). We are proposing to restack the damaged and deteriorating rock bulkhead landward of OHW. This will reestablish approximately 300 square feet of upper intertidal habitat. Regrading and replanting the impacted slope with native vegetation will enhance stormwater retention and provide habitat for shoreline birds and wildlife. We are also applying for a SEPA determination with the City of Federal Way. Please find the required material attached. Application Submittal Material 1. A Joint Aquatic Resources Permit Application that contains the information required by FWRC 15.05.140 2. State Environmental Policy Act (SEPA) submittal requirements: We request your review and comments on this proposed project. Please contact me at 253-389-0712 if you have any questions. Thank you for your time and assistance. r A�kCITV OF Federal Way October 17, 2016 Joe Yoon 310083 9�h Place SW Federal Way, WA 98023 33325 8th Avenue South Federal Way, WA 98003-6325 (253) 835-7000 www. cityoffederalway. com Jim Ferrell, Mayor Emailed: hsjyoon�yahoo.con) RE: File #15-102033-AD/14-103730-00-SH; YOON SHORELINE RETAINING WALL/GRADING Geotechnical Peer Review Comments, 31008 391h Place SW, Federal Way Dear Mr. Yoon: Please find Geotechnical Engineering Services Peer Review by GeoDesign Inc., the City's third - party, for the Yoon Shoreline Retaining Walls and Grading violation. The technical memorandum addresses a revised Geotechnical Report prepared by GeoResources LLC (dated March 10, 2016) and a revised plan -set resubmitted March 17, 2016. The City forwarded review comments to the applicant on May 21, 2015 and April 21, 2016. Staff had subsequent conversations with your retained consultant, Bill Rehe of Leon Environmental LLC, on a project redesign. GeoDesign's review will assist in the redesign proposed, seeking to remediate the slope and shoreline. Shoreline work completed without permits (or city approvals) included: Vegetation and tree removal in a geologically hazardous area. • Removal of a rail road tie path, containing creosote treated timber. • Installation of a series of retaining walls and landscaping pavers within the 50-foot required shoreline setback (FWRC 15.05.070), exceeding 4 ft. Findings & Recommendations The city concurs with GeoDesign Inc.'s findings dated September 27, 2016. • GeoDesign Inc., states the area does meet the definition of a "Landslide Hazard Area" pursuant to FWRC 15.10.160, FWRC 15.05.040(4)(b)(iii) and FWRC 19.05.070. Portions of the slope from the north side of the house down to the waterfront are in excess of 40. percent. • The Planning Division does not concur with GeoResources' statements that the subject property does not contain landslide hazard areas (page 5). ■ GeoResources shall revise the report dated March 10, 2016, to reflect all review comments on page 2 and 3 of the enclosed GeoDesign Inc.'s September 27, 2016 review memo. Closing Please submit three copies of a revised geotechnical report and three revised plan -sets with a project resubmittal form. Please clearly outline how you have addressed all third party review Mr. Yoon October 17, 2016 Page 2 or2 comments in writing. If you have any questions regarding this letter, please contact me at lei la.willouaghby-oakes c-,cityoffederalway.com or 253-835-2644. Sincerely Leila Willoughby -Oakes Associate Planner c: Ann Dower, Senior Engineering Plans Reviewer (attach peer review) Brad Biggerstaff GeoResources, Email: 13rad[3 r ;epresourccs.us (attach peer review) Bill Rehe, Senior Wetland Biolo-ist, Leon Environmental, Email: Rtzheri',kon-cnvironmen talcon) (attach peer review) Kevin Lamb, Principal Engineer, GeoDesign Inc.. Emailed: Wmhar)ecndesisaninc.coin enc: Resubmittal In Formation Form Geotechnical Engineering Services Peer Review prepared by GeoDesign Inc. (dated September 27.2016) 1i-I020i3-00-AD Da I D 74837 �DESIGNuz September 27, 2016 City of Federal Way Department of Comn 11325 R'h Avenue Snr Federal Way, WA 98003 Attention: Leila Willoughby -Oakes, Associate Planner Geotechnical Engineering Services Peer Review File#15-102033-00-AD Yoon Shoreline Retaining Walls and Grading Violation 31008 39`h Place SW . Federal Way, Washington GeoDesign Project: FederalWay-3-01 INTRODUCTION This letter presents a summary of our peer review of the geotechnical reports and background information regarding the proposed repair of unpermitted block retaining walls on the Yoon property located at 31008 39`h Place SW in Federal Way, Washington. Our scope of services is to provide third parry review of the submitted geotechnical information, reports, and proposed construction plans for conformance with: Chapter FWRC 15.10 "Critical Areas" WRC 15.10.160 "Limitations" Geotechnical Report FWRC 15.05.040 General Development Standards (4)(b)(iii) UNDERSTANDING The northern boundary of the Yoon property is waterfront that abuts Dumas Bay in Puget Sound. The property contains "Shorelands" as defined in the FWRC and is categorized as "Shoreline Residential Environment." FWRC 15.05 is applicable to this site as it meets the definition of "Shorelands." The property slopes down to the waterfront from 391h Place SW. Portions of the slope from the north side of the house down to the waterfront are in excess of 40 percent and appear to meet the FWRC 15.05.030 "Steep Slope Hazard Area" definition and the FWRC 19.05.070 "Landslide Hazard" definition. A rock bulkhead is present along the shoreline of the Yoon property. Prior to July 2012, the backyard above the bulkhead included timber retaining wall elements for slope support adjacent to a path down to the shoreline and to support landscaping elements. 10700 Meridian Avenue North, Suite 402 1 Seattle, WA 98133 1 206.838.9900 www.geodesigninc.com We understand that between July 2012 and May 2013 Mr. Yoon completed landscaping improvements on the landward of the existing rock bulkhead. Creosote timber retaining walls were removed and portions of the slope between the back of the existing house and the rock bulkhead were re -graded. Retaining walls constructed with concrete masonry units ("Keystone" - type blocks) were used to support the re -grading and removal of the creosote timber retaining walls, and much of the re -graded ground surface behind the walls was surfaced with concrete pavers. The work was unpermitted and is classified as a Shoreline Modification. Since the work was completed, the retaining walls have deformed and portions of the walls have failed. Mr. Yoon is working with the City of Federal Way (City) to correct the unpermitted work. Mr. Yoon retained GeoResources, LLC to provide geotechnical services in accordance with FWRC 15.05.050 and to complete a design of replacement walls. Soundview Consultants was also retained by Mr. Yoon to provide a shoreline assessment that included defining the Ordinary High Water Mark (OHWM) on the Yoon property. DOCUMENT REVIEW As part of our scope of services, we reviewed the following documents: • Construction Plan Sheets C-0, C-1 A, C-1 B, C-2, C-3, C-4, C-5, and C-6, prepared by GeoResources, LLC, dated March 17, 2016. • GeoResources, LLC - Geotechnical Consultation, Grading Plan - Shoreline, Restoration and Block Wall Repair; 31008 3911 PI SW; Federal Way, Washington, dated March 15, 2016. Job Number: Yoon.39thPISW.L2. • GeoResources, LLC - Geotechnical Report - Update, Shoreline, Restoration and Block Wall Repair; 31008 39`h PI SW; Federal Way, Washington, dated March 10, 2016. Job Number: Yoon.39thPISW.RG2. • Soundview Consultants - Technical Memorandum, Ordinary High Water Delineation and Assessment, dated February 26, 2016. File Number: 1428.0001. We also reviewed several site photographs provided by the City documenting the site conditions. REVIEW COMMENTS CHAPTER FWRC 15.10 "CRITICAL AREAS" Pertinent sections of Chapter 15.10 applicable to the geotechnical aspects of the project are 15.10.120 and 15.10.160. FWRC 15.10.120 The proposed location of the retaining walls, as indicated on the Construction Plan Sheets, appears to be within areas impacted by past grading and landscaping activities within the steep slope hazard area. The walls, if constructed properly, should reduce the erosion potential, improve slope stability, and minimize impacts to the area. We conclude the proposed work is in compliance with FWRC 15.10.120. tea. DES I G NZ 2 FederalWay-3-01:092716 FWRC 15.10.160 "LIMITATIONS" GEOTECHNICAL REPORT The information provided in the GeoResources, LLC geotechnical report appears to address FWRC requirements that have(been revised. The report should be modified to conform with the updated code. Additional information or revisions to the report are required as identified below: • FWRC codes referring to FWRC Chapter 19 should be revised to acknowledge that FWRC Chapter 15.05 is applicable to this site and that the site has a "Steep Slope Hazard" in accordance with FWRC 1 5.05.030-. ■ The submitted report was missing Page 6, please provide a complete report. • Page 7 - Design active earth pressures are provided for ground slope behind the wall up to 5 percent. Slopes shown on the plans between the wall appear to be in excess of 5 percent. Please provide updated recommendation to account for slopes in excess of 5 percent behind walls. • Page 8 - It appears that the proposed "needle" piling are being relied on to provide vertical and lateral load resistance for the wall. Please provide updated lateral pile capacity recommendations for the "needle pile" and indicate whether some of the piles will be battered in order to provide lateral resistance. • Page 8 - A passives pressure allowable equivalent fluid density of 300 pounds per cubic foot for material in front of the wall is recommended as well as neglecting the top 3 feet of passive resistance for lateral support of the wall. The wall is just above the OHWM and will be embedded below it. Please provide an update passive pressure to account for saturated conditions. FWRC 15.05.040 GENERAL DEVELOPMENT STANDARDS (4)(0)(111) (iii) New development on sites with steep slopes and bluffs is required to be set back sufficiently to ensure that shoreline stabilization is unlikely to be necessary during the life of the project as demonstrated by a geotechnical analysis. This section of the code requires sufficient setback to ensure that shoreline stabilization is unlikely to be necessary in the future. GeoResources, LLC indicates the rock bulkhead along the shoreline has settled and the owner plans on restoring it at a later time. Provided the bulkhead is restored to prevent erosion along the toe of the slope, we agree that the 1 5-foot setback from the OHWM should be sufficient. The proposed walls are classified as "Accessory Structures" (FWRC 19.05.190) and are permitted within the 50-foot shoreline setback as defined in FWRC 15.05.80. Accessory Structures within the shoreline setback are limited to any one structure covering less than 150 square feet, and no more than 300 square feet combined coverage. We estimated the wall footprint coverage as the width of a typical concrete masonry unit retaining wall block (1.5 feet) times the combined length of the walls; the proposed walls within the 50-foot shoreline setback have a combined coverage of approximately 464 square foot. A variance will be needed to construct the walls as being proposed. Alternatively, the upper wall could be moved upslope and out of the 50-foot shoreline setback, and the lower walls could be reconfigured to a shorter configuration to meet the 300 square foot criteria. A reinforced soil slope with a vegetated face may also be another alternative worth considering. 5DESIGN= 3 FederalWay-3-01:092716 We appreciate the opportunity to provide our services on this project. Please call if you have questions regarding this submittal Sincerely, GeoDesign, Inc. Kevin ]. Jb,P.E. Principal Engineer K)L:rc One copy submitted (via email only) Document ID: Federa[Way-3-01-092716-geol.docx © 2016 GeoDesign, Inc. All rights reserved. MDESIGN= "N k Z 29441 5 Signed 09/27/2016 Federal Way-3-01:092 716 -) FILE CITY OF t Federal Way April 1, 2016 CITY HALL 33325 8th Avenue South Federal Way, WA 98003-6325 (253) 835-7000 www. cityoffederalway. com Jim Ferrell, Mayor Hyongsop `Joe' Yoon Emailed: hs'yi ❑ol1 ci~7_yaiioa.con 31008 39th Place SW Federal Way; WA 98023 RE: File#15-102033-00-AD; YOON SHORELINE RETAINING WALLS & GRADING VIOLATION Geotechnical Report Peer Review; 31008 39`h Place SW, Federal Way Dear Mr. Yoon: Please find the enclosed consultant task authorization which includes a scope of work in order to review the `Geotechnical Summary Report Retaining Wall Repair- Support' originally prepared in April 2015, resubmitted and revised in March 2016 per City technical comments, prepared by GeoResources. The department's geotechnical on -call engineer, GeoDesign, Inc., was requested to provide an estimate for their review of the information and submitted report. Please find the GeoDesign, Inc. fee determination summary enclosed. When authorized by you, the City will set up an account to be funded by the applicant and drawn down by the work performed by GeoDesign, Inc. If any funds are not used, they will be returned to the applicant. A check in the amount of $2,000.00, made payable to the City of Federal Way, and a signature on the consultant's authorization forin must be submitted before the peer review will begin. Additional reviews or meetings if necessary will require supplemental cost and authorization. The City will contact you if these actions are necessary. Following receipt, the project planner will authorize GeoDesign, Inc. to begin their formal review. Please note on May 21, 2015, the Public Works and Community Development Departments reviewed and provided technical comments on the site and civil engineering plans submitted. These City comments are subject to change if the proposal changes and based on GeoDesign's peer review of the project's design. If you have any questions regarding this letter or your third -party review request, please contact Associate Planner Leila Willoughby -Cakes at 253-835-2644 or leila.wiIloughby-oakes@cityoffederalway.com. Sincerely, Leila Willoughby -Oakes Associate Planner c: Joni Schick_ Permit Facilitator. PO Box 501, Fox Island. WA 98333: Email: ermi[4a�i itaiinQll�'nniCcieontCTst.nel Kevin Lamb, GeoDesigns. LLC: Email: k-Il Lnilxi, ueodesigninc.com Ann Dower. Senior Engineering Plans Examiner enc: Task Authorization Form (for Applicant's Signature) Third Party Reviewer Fee Invoice Doc 1,D, 7106i CIiV OF ti. Federal Way March 30, 2016 CITY HALL 33325 8th Avenue South Federal Way, WA 98003-6325 (253) 835-7000 www.cityoffederalway.com Jim Ferrell, Mayor Kevin Lamb, PE, LEG Emailed: klamb.a eodesigminc.cnm GeoDesign Inc. 2501 Jefferson Avenue Tacoma, WA 98402 RE: File #15-102033-00-AD; REQUEST FOR THIRD PARTY GEOTECHNICAL REPORT REVIEW Yoon Retaining Walls Grading Violation — 31008 39'h Pl. SW, Federal Way (758200 0070) Dear Mr. Lamb: Please find the enclosed task authorization form for the above -mentioned tax parcel number and related project file #14-103730-SH. The applicant will submit a building permit shortly. The Public Works and Community Development Departments conducted site visits in April 2015 and in March 2016 with the Department of Ecology and Soundview Consultants LLC (retained by Mr. Yoon), and request a third - party review pursuant to the agreed terms of the on -call contract. Please review the scope of work contained in the task authorization form, enter the task cost on page 2 of the document, and return to the city by email and the signed original by mail. Following the deposit of funds by the applicant, staff will provide authorization to proceed with the scope of work. For the purposes of expediting review timelines the City requests the proposed tasks are completed within 10 business days of receiving notice to proceed from the City. Please contact the project planner at 253-835-2644 or leiia.-vvillougliby-oaites(.-z�cityoffederalway.cotm if you have any questions regarding this task or the proposed scope. r Sincerely, M1 Z /moo Leila Willoughby-Qake Associate Planner enc: Consultant Task Authorization Form Ordinary High Water Mark Determination (prepared by Soundview Consultants LLC) March 2016 Revised Geotechnical Study (prepared by GeoResources LLC) Superseded April 2015 Geotechnical Study (prepared by GeoResources LLC) Development Services Manager (EJ Walsh, PE) Email, Technical Review Comments City's Technical Review Letter (May 21, 2015) Reduced Plans (Sheets C-0-C-6) Site Visit Pictures c; Ann Dower, Senior Engineering Plans Reviewer 5-10203 3-A D Doc I D: 71064 /4- c CITY OF Federal Way GEOTECHNICAL ENGINEER AUTHORIZATION FORM Date: March 30, 2016 City: City of Federal Way Community Development Department 33325 8th Avenue South, Federal Way, WA 98003 Consultant: Kevin Lamb, P.E., L.E.G. GeoDesign, Inc. Tacoma Office 2501 Jefferson Avenue Tacoma, WA 98402 Email: klamba),geodesigninc.com Project: Yoon Retaining Wall/ Grading Violation — Geotechnical Report Peer Review Property: 31008 39"' Place SW, Federal Way File Nos.: 15-102033-00-AD & 14-103730-SH Project Consultant Joni Schick, Permit Facilitator Contacts: PO Box 501 Fox Island, WA 98333 Email: periiiitfacilit-,ttiii,-,,,bvioni@coi-ncast.net Brad Biggerstaff, Geotechnical Professional GeoResources, LLC 5007 Pacific Hwy. E., Suite 16 Fife, WA 98424 Email: BrafflQgeoresources.us Project Applicant: Hyongsop `Joe' Yoon 31008 39th Place SW Federal Way, WA 98023 Email: hsivoon cr aly ioo.com Project Planner: Leila WilloLIghby-Oakes Email: leila.willoughby-oakes@cityoffederalway.com Phone: 253-835-2644 Project Background: In 2014, the City was notified by King County that the property owner illegally constructed a series of four tiered retaining walls composed of landscaping blocks and a paved path, without city approvals (building permit, shoreline exemption and grading). Each wall exceeds 6 feet and the structures total 2,590 square feet of impervious surface within a geologically hazardous area. The walls are within 50 feet of the Ordinary High Water Mark (OHWM). The City critical area inventory identifies the area as an Erosion hazard area and a Landslide hazard area. The existing strLlcture has partially collapsed. Please find the OHWM determination and the city's drainage/planning technical review enclosed. Documents • Revised Geotechnical Report, prepared by GeoResources LLC, March 10, 2016 Provided: ■ Superseded Geotechnical Report, prepared by GeoResources LLC, April 2015 • Ordinary High Water Mark Determination (prepared by Soundview Consultants) • Development Services Manager Email, Technical Review Comments • City Technical Review Letter (May 21, 2015) ■ Reduced Plans (Sheets C-0-C-6) ■ Department of Ecology Site Visit Pictures (March 2016) Task Scope: 1. For lands located within shoreline jurisdiction (200 feet landward from the Ordinary High Water Mark) review submitted documents for conformance with: a. FWRC 15.10 `Critical Areas', b. FWRC 15.05.040(4)(b)(iii) 'General Development Standards, Critical Areas - Geologically hazardous areas; and c. Article IV. Geologically Hazardous Areas Development- FWRC 15.10.160 `Limitations'. 2. Provide a memo identifying additional information requested as necessary. 3. Conduct site visit as necessary. 4. Meetings on site and/or with applicant's Geotechnical Engineer or City of Federal Way staff if necessary. 5. In the memorandum, provide a written response outlining concurrence with GeoResources LLC's findings and conclusions, or required technical revisions. Task Schedule: Not to exceed $ Authorization. Acceptance: Without a prior written amendment to this Task Consultant (Kevin Lamb, PE, LEG, GeoDesign, Inc.) City of Federal Way Staff (Leila Willoughby -Oakes, Project Planner) Applicant (Joe Yoon, Property Owner) Date Date Date 15-102033-AD Doe ID, 69233 LL.1 May 21, 2015 Jim Ferrell, Mayor Brad Biggerstaff GeoResources, LLC Emailed: BradBn@&oresources.us 5007 Pacific Highway E, Ste 16 Fife, WA 98402-2462 RE: Permit #15-102033-00-AD, REVIEW COMMENTS Yoon Shoreline Project Third -Party Consultant Review, 31008 39`h Place SW, Federal Way Dear Mr. Biggerstaff. The Community Development and Public Works Departments performed internal reviews of the report `Geotechnical Summary Report: Retaining Wall Repair — Support' dated April 12, 2015, submitted - electronically by the property owner (Joe Yoon) on April 27, 2015. This letter mainly addresses a review of the geotechnical report contents; however, FWRC Chapter 15 — Shoreline Management remains applicable to the existing structure and any proposed actions on the shoreline. Corrections to the geotechnical report shall be made before the Planning and Development Services Divisions sign off on future shoreline land use and building permit approvals. We understand that the submitted report is undergoing revisions to comply with the Federal Way Revised Code (FWRC) Chapter 15 — Shoreline Management, and contains preliminary planning division comments regarding the shoreline. We strongly advise the agent integrates the City's internal comments under one re -submission for third party review. Please note the shoreline modifications to existing riprap at the structure's base, discussed in the geotechnical report, are not included in this review or scope of work. Any action on the beach must be permitted under a different shoreline review. PROPOSAL DESCRIPTION The applicant proposes to acquire approvals for after -the -fact, grading, clearing, and construction of a terraced retaining wall structure, connected by landscaping pavers. Existing vegetation and several bushes/trees were removed from a designated landslide and erosion hazard areas. The proposal is located within the Urban Conservancy Environment of the Shoreline. Please find the City's review comment below. TECHNICAL REVIEW COMMENTS Geotechnical Study 1. Please discuss how the upslope drainage area and any influence from roof drains and surface water, etc., will impact the existing conditions and proposed walls. 2. The report shall describe, quantify, and identify the removal of the existing retaining wall structure required for stabilization (i.e., soil nailing, tiebacks, etc.) in the geologically hazardous area. 33325 8th Avenue South, Federal Way, WA 98003-6325 (253) 835-7000 www.cityoffederalway.com Mr. Biggerstaff May 21, 2015 Page 2 3. Identify the requirements for specific foundations/walls (or all) that must include designs for uplift. The report references uplift requirements. It is unclear for which walls this is necessary. Since the walls are proposed as a segmental block, the report should address how the segmental block is to be attached to the foundation and upper courses of block. 4. The proposed retaining wall requirements shall address the need for reinforcement. The submitted report proposes to do so with deadmen. Please include the minimum setbacks from face of wall, and batter requirements and discuss how the deadmen will be structurally connected. If the deadmen are connected by welding, clearly address the building permit requirements for repairing galvanizing. The deadmen appear to be proposed solely for the foundation. Please include in the revised geotechnical report the specific requirements of the segmental block reinforcement above the foundation. 5. The report references structural foam as an option versus backfill. Given the proximity to Puget Sound, coupled with groundwater observed in the boring; please amend the report to reflect requirements to prevent the uplift of foam behind the wall. 6. In the report include requirements for testing. 7. Please provide an overall global stability analysis of the wall systems and interactions between the various walls in the revised geotechnical study or make this a requirement of the wall design. 8. As part of the wall design, add a requirement in the report that a localized slope stability analysis shall --be performed -for the critical sections.. - Shoreline Regulation Compliance - Preliminary Review (No Site Plan Available) Compliance with FWRC Chapter 15 — "Shoreline Management," is required for the existing unpermitted terraced accessory residential shoreline structure including any proposed structural alterations. Development regulations related to this project are, but not limited to: FWRC 15.05.080- Urban conservancy environment, FWRC 15.05.050- Shoreline modifications, and FWRC 15.05.070- Summary of uses, approval criteria, and process. Please review regulations carefully prior to resubmitting studies and plans. Please note the applicant has not submitted an up-to-date site plan or final structure design. Planning notes development within the required shoreline setbacks for residential accessory structures, 50 feet from the Ordinary High Water Mark FWRC 15.05.030), are limited to: 8 feet in height r 150 sf per structure (maximum footprint) • 300 sftotal for all structures (maximum footprint) 10. The report references repair of the failing rip rap rock. This is a shoreline modification using a hard armoring method pursuant to FWRC 15.05.050. Please note rip -rap repair is not included under this review. Shoreline stabilization in form of hard -armoring is discouraged by the shoreline master program. Within the Urban Conservancy Environment designation rip rap is not an outright permitted use. Accordingly, shoreline modifications via hard armoring are subject to the approval of a shoreline conditional use permit subject to the conditions of FWRC 15.05050(1)(a)-(b). 15-102033-AD Doc ID: 69321 Mr. Biggerstaff May 21, 2015 Page 3 BUILDING PERMIT SUBMITTAL A building permit is required for this development. Please provide plan and study certification by a licensed engineer as a requirement of the design, construction oversight of piling, and foundations for project completion. CLOSING Please resubmit three copies of revised geotechnical report with a cover letter describing how each item has been addressed in the report and a project resubmittal form. Please submit a site plan reflecting design changes, clearly depicting the existing and proposed improvements. ■ Geotechnical Report [3] Copies • Cover Letter [3] Copies Upon receipt, the revised geotechnical report will be forwarded to the City's third party consultant for review. You may contact me at 253.835.2644 or leila.willoughby-oaken a cityoffederalwa�y.com with any questions regarding this letter. Sincerely, Leila Willoughby -Oa Associate Planner enc: Bulletin #129, Project Resubmittal Form Email to GeoResources, LLC, dated April 28, 2015 Email to Joe Yoon from Isaac Conlen, Planning Manager, 2014 •c: Leila Willoughby -Oakes, Associate Planner E.J. Walsh, Development Services Manager Joe Yoon, Emailed: hsiyoon(@vahoo.com (Applicant/Property Owner) Kevin Lamb, GeoDesign, Emailed: klamb eodesigninc.com (Third Party Consultant) 15-102033-AD Doc 1D: 69321 0 f CITY OF Federal Way GEOTECHNICAL ENGINEER AUTHORIZATION FORM Date: March 30, 2016 City: City of Federal Way Community Development Department 33325 8th Avenue South, Federal Way, WA 98003 Consultant: Kevin Lamb, P.E., L.E.G. GeoDesign, Inc. Tacoma Office 2501 Jefferson Avenue Tacoma, WA 98402 Email: kla.mb(@.P-Nde-sip-ninc.com Project: Yoon Retaining Wall/ Grading Violation — Geotechnical Report Peer Review Property: 31008 301 Place SW, Federal Way File Nos.: 15-102033-00-AD & 14-103730-SH Project Consultant Joni Schick, Permit Facilitator Contacts: PO Box 501 Fox Island, WA 98333 Email: permitfacilitatiiigbyioni@comeast.net Brad Biggerstaff, Geotechnical Professional GeoResources, LLC 5007 Pacific Hwy. E., Suite 16 Fife, WA 98424 Email: BradB@,eeoresources.us Project Applicant: Hyongsop `Joe' Yoon 31008 39th Place SW Federal Way, WA 98023 Email: hs0yoon@vahoo.com Project Planner: Leila Willoughby -Oakes Email: leila.willoughby-oakes@cityoffederalway.com Phone:253-835-2644 Project Background: In 2014, the City was notified by King County that the property owner illegally constructed a series of four tiered retaining walls composed of landscaping blocks and a paved path, without city approvals (building permit, shoreline exemption and grading). Each wail exceeds 6 feet and the structures total 2,590 square feet of impervious surface within a geologically hazardous area. The walls are within 50 feet of the Ordinary High Water Mark (OHWM). The City critical area inventory identifies the area as an Erosion hazard area and a Landslide hazard area. The existing structure has partially collapsed. Please find the OHWM determination and the city's drainage/planning technical review enclosed. Documents • Revised Geotechnical Report, prepared by GeoResources LLC, March 10, 2016 Provided: . Superseded Geotechnical Report, prepared by GeoResources LLC, April 2015 • Ordinary High Water Mark Determination (prepared by Soundview Consultants) • Development Services Manager Email, Technical Review Comments • City Technical Review Letter (May 21, 2015) ■ Reduced Plans (Sheets C-0-C-6) • Department of Ecology Site Visit Pictures (March 2016) Task Scope: 1. For lands located within shoreline jurisdiction (200 feet landward from the Ordinary High Water Mark) review submitted documents for conformance with: a. FWRC 15.10 `Critical Areas', b. FWRC 15.05.040(4)(b)(iii) `General Development Standards, Critical Areas - Geologically hazardous areas; and c. Article IV. Geologically Hazardous Areas Development FWRC 15.10.160 `Limitations'. 2. Provide a memo identifying additional information requested as necessary. 3. Conduct site visit as necessary. 4. Meetings on site and/or with applicant's Geotechnical Engineer or City of Federal Way staff if necessary. 5. In the memorandum, provide a written response outlining concurrence with GeoResources LLC's findings and conclusions, or required technical revisions. Task Schedule: Not to exceed $ _2,000 without a prior written amendment to this Task Authorization. Acceptance: X. Consultant 0 f — 03/30/2016 Lamb, PE, LEG, Geo. sign, Inc.) Date ederal Way Staff (Leila Willoughby -Oakes, Project Planner) Applicant (Joe Yoon, Property Owner) 15-102033-AD Doc ID: 69233 s Le%ia Willoughby -Oakes From: Brad Biggerstaff <BradB@georesources.us> Sent: Monday, November 02, 2015 3:53 PM To: Leila Willoughby -Oakes Cc: Joe Yoon Subject: RE: Yoon- Permit Expiry Attachments: DOC110215-006.pdf Leila, So based on your email (I read in more detail), it would be better for him to return his slope, beach access trail and shoreline area to the previous conditions, which was existing from 1977 WDOE Aerial photo, attached? Rather than argue and spend money over compliance issues.... Looking at the historical aerial photos, the bulkhead was existing, as was the hard surface switch back trail to the beach area. The change was the walls and paver area increase. We think this would be much more cost effect for him than spending the money on surveys, technical studies, wall designs, rebuilding the walls and slope area to the new configuration, although it would be much more stable. The historical aerial photos should provide a means for him to complete the work. We will let him advise you how he will proceed. It is too bad he was not more careful with his original selection of contractors and consultants. Wish he had called us instead, but hind site...... Brad From: Leila Willoughby -Oakes [maiIto: Lei la.Willoughby-Oa kes@cityoffederalway.com] Sent: Monday, November 02, 2015 10:52 AM To: Brad Biggerstaff <BradB@georesources.us> Cc: Joe Yoon <hsjyoon@yahoo.com>; Grace Skidmore <Grace.Skidmore @cityoffederalway.com>; Peter Lawrence <Peter.Lawrence @cityoffederalway.com> Subject: RE: Yoon- Permit Expiry Greetings Brad, Previously Mr. Yoon had not retained a consultant to do the permitting and resolve compliance issues. The time spent on this project has been high in terms of making the applicant aware that other agency approvals will be necessary. Which the City has not been made aware of (HPA and archeological studies). A peer review will still be required after the submittal of all revised materials. Direct services was not a feasible option on this project due to the scale of the violation and the method in which things have been installed per our on -call consultants. Staff spent time on this. The geotech. report was reviewed internally by our development services manager, as a professional engineer, he raised questions, which have not been answered. An email was sent by Isaac in 2014, letter was sent to Mr. Yoon on next steps in Feb. 2015 after a meeting with the city and a technical review letter was sent in May 2015. The vegetation conservation area, native plantings and the maximum footprint of the residential accessory structure will be strictly applied on this project within the 50 ft. required shoreline setback. A very large area of impervious surface was added where none previously existed. Substantial existing shoreline vegetation was removed by this violation and shall be replaced. This is not a legal nonconforming development. Meeting the shoreline master program and urban conservancy shoreline regulations will not be up for debate Brad, as previously posed by Georesources. There will be a building permit review due to the wall surcharge, and the 4 ft. proposed walls will not be exempt from a building permit. I suggest your firm provides clear rationale quoting code requirements of the urban conservancy area in the project narrative you submit to ensure clear expedient review. Clearly outline how the new proposal achieves all of the review comments from May 2015, setbacks, drainage concerns and shoreline regulations with valid data. Clearly show the new lot coverage proposed and what was there previously. Please note the pavers placed by the landscaping company are likely not pervious as noted on the plans. If you wish to note this on plans, please provide valid documentation. Grass grid pavers may be an option to reduce overall footprint. Foremost all development and uses shall result in no net loss of ecological function and shall be consistent with the impact mitigation requirements of FWRC 15.05.040(1). Thank you, L. Willoughby -Oakes Associate Planner Please resubmit all applications via the Permit Center 33325 8th Avenue South Federal Way, WA 98003-6325 Phone:253/835-2644 Fax: 253/835-2609 www.cityoffederalway.com From: Brad Biggerstaff [mailto:BradB@georesources.us] Sent: Monday, November 02, 2015 9:28 AM To: Leila Willoughby -Oakes Cc: Joe Yoon Subject: RE: Yoon- Permit Expiry Kyle has been working on plan between other projects to reduce costs to Mr. Yoon. We will move to finish before expiration. Not sure why staff time has been high, the only real time for the city on the project was the meeting on - site. I would think the discussions and sketches sent to work towards a fix that the city was comfortable with would have been casual and not really required any significant time, unless you are communicating with Mr. Yoon? From: Leila Willoughby -Oakes [mailto:Leila.W•sllou hb -Oakes cit ❑ffederalwa .com] Sent: Monday, November 02, 2015 9:05 AM To: Brad Biggerstaff<Brad_B_@_georesources.us> Cc: Grace Skidmore <Grace.5ki_dmore@cityoffederalway•com>; Permit Center<PermitCenter@cityoffederalway.eom> Subject: Yoon- Permit Expiry Hello Brad, The City is looking to work towards wrapping things up on the Yoon property. I suggest we start fresh with a new formal submittal of the shoreline exemption and a single family building permit. The staff time associated with assisting you and the homeowner has far exceeded the cost of the shoreline exemption application in 2014.1 am requiring the building division look at structural stability of the walls as soon as possible for life and safety and we need to address the impact of this on natural habitat protection. The Permit Center will be expiring the shoreline exemption submitted at 31008 391h PI (14-103730-SH) shortly. The permit will expire within less than 30 days. The file was activated on July 25, 2014. A technical review letter was sent to your offices on May 21, 2015. There has been no response in writing from applicant or Georesources specifically addressing the technical review comments from Planning and Public Works. Draft site plans are the only materials and provided over email, with no elevations (you must provide elevations with the proposed and existing grades for staff to measure permitted height within the shoreline setback), no narrative, no plans showing 2 ft. contours, no outside agency approvals (external agency approvals are the responsibility of the applicant), or archeological studies as requested by DAHP. You may need to obtain shoreline permitting expertise to comply with the SMP if Georesources does not have the capacity in house. We will not be pre -reviewing or vetting proposals before you have submitted adequate copies for technical reviewers through the permit center. You simply need to resubmit so the city can conduct their review. As stated previously, the desired design may not be possible as this is a code violation on the shoreline. There are the two applications requiring approval, please tell the applicant there will likely be resubmittals. • a single family building permit, and; • shoreline exemption. Email resubmittals of preliminary drawings/plans will not be accepted. This has proven to be ineffective on this project and others to resolve review comments and achieve code compliance for Planning, Public Works and Building Divisions. There are required revisions to the geotechnical report that cannot be resolved by simply providing an amendment letter without any references to study pages, technical data or a site plans that does not match those submitted by the civil engineer. The report must be physically and internally revised before we send this to a peer reviewer, clearly showing where you have made changes. As the consultant lead (Georesources), all the information you need is within Title 19- Critical Areas and Title 15- Shoreline Management as forwarded previously. I have attached a scanned an email from Isaac Conlen, Planning Manager clearly stating next steps sent to Mr. Yoon in 2014 for your reference. Please submit as soon as possible. The Permit Center will expire the Shoreline Exemption if they do not receive a formal resubmission of the requested changes and revisions within 180 days of the technical review letter. I suggest we do this to start fresh as you are submitting a new proposal, and Joe did not start this process with technical assistance. Correspondence on compliance requirements and abatement from code enforcement will follow shortly. Thank you, L. Willoughby -Oakes Associate Planner Please resubmit all applications via the Permit Center. I 25 33325 8th Avenue South Ile Q w o 441 N C� %57 0. I EXISTING; M� DRIVEWAY' GRAPHIC SCALE `.L U LU EXISTING PERVIOUS N PAVER, PATIO AREA \� N, EX IST� RESIDENCE 30 0 15 0 1 r A J■ ( IN FEET ) 1 inch = 30 ft. NOTE:BOUNDARIES AND DATUM ARE ASSUMED BASED ON * ALL DIMENSIONS ARE APPROXIMATE AND PIERCE COUNTY GIS DATA. THIS IS NOT A SURVEY ARE TO BE FIELD VERIFIED AT THE TIME OF CONSTRUCTION Y U Co w cn. ll I� ll I EXISTING PERVIOUS PAVER WALKWAY GRAVELED AREA BETWEEN WALLS 327 l l� EXISTING WALKWAY S E CTI N A -A' %3, l � S. AI o 1 LAN DING)* l a I �304' 40i� OHWM sop , i\ �45' 2 2d 1 W EXISTING WALL LOCATIONS. DENOTED WITJ DASHED LINE) 1 PRIVATE IMPROVEMENTS • D6,'1 r,OIxR'-N, EvCi-.i I R DATE PIERCE. COUN. 'ORDINN CIWMBLRISI 2012 - 2 5 .�Rxl.crn.:.w rno, iwrna; r.ii,�",w:i187 +••• Know what`s below. Cal l before you dlg. �Z a cc C o � o .3m.yo O o U� — U) O o �o U) CD 0 U)o �M000 I 0 c Op 00 00 O - 0 L q) F LL- seEr tmF: EXISTING CONDITIONS '61P nod ajopq IIeo -molap S,tegmMou71 +0 ()j ! ,OE ,OZ ,SZ 0 sl HM HO WHO WO�JJ >i0d8J-3S NIW ,9[ NOLV00-1 -nVM =OdO Jd Nomn'i1SN07 j0 3WI1 3H1 IV 091d1113A Ol3Id 39 01 3NV .l3ANI1S V ION SI SIHL "V1V0 SI9 A1NnO0 3DdaId ONV 31VWIXOLddV 3'dV SNOISN3WIO llV > NO 03SVO 03wnssv 3,dv wn-Lva ONV S31aVONnoe:310N IJ 00 = Ljaui T ( taad Ni ) st o os (a3SOdX3ycyNixyri ,-v> 38 Ol S-nb'M) SNQ1J_VDO0 _ -MM - aIISOdO�ld (1nk1TnI10Q DDOkiinr-n RY (Yll INTY (:IS 140' 130' 120' 110' 100' 90' 80' 70' 60' 50' 40' 30' 20' 10' 0' GRAPHIC SCALE 10 0 5 10 ( IN FEET ) 1 inch = 10 ft. NOTE:BOUNDARIES AND DATUM ARE ASSUMED BASED ON • ALL DIMENSIONS ARE APPROXIMATE AND PIERCE COUNTY GIS DATA. THIS IS NOT A SURVEY ARE TO BE FIELD VERIFIED AT THE TIME OF CONSTRUCTION i d Know what's below. 6- Call before you dig. III o 000 a Q'o —0 �0 v U)0 000 c oo >,r- C 0C) a 0 �o L 4) 0) LL. sew nna SECTION A —A' SW No. w_3 I NOTES TO USE Nde map is ter weal sdmnlwoh" IN Kaooaal Flood lrswnnee Pfogey," fl d' W n......4 IporNto aL veal u*6.G Ie Ilmdleag, palEeuyly hem beat de.ru e. of Rn,s ws, The eem-FINY mAp trp"Im Ambit be eenrra.d 9os�slble updated or additional flood hazard infer tit &I "14av mare Analr! Infammmo l In aisar.rh.fs "to Fleed EIw.00tn wl ,W1w Yea ronry. h." bean WHtmmed, wars aW sWW1.QId Is ean.a0 IA- FitPrafdn.erd Fkedwar Dala ' Summary of SeMANr EhralR,w IM4slzpnls. sa N, 111r Fhad Nnwa.0 Ebrdy to", i.rxan shot K+-amprnna 1rr FIRM. Us Mould b..l that EFEa .. as W. FIRM Nprwl. ratow d wha1ad ov.moffs Tr.. M I.:N Im.Nwd far Alad asv's- rasov PwIs .any e .NovW wbarused ..Ih. sole searoe eI fk" a .1-01 W-Haan. A=Wlm flood elevation data p.e..Nd In the FIS Report Mom be uM¢e! N Mrjunctlon z the FIRM for pufpo... o!-truellon and/or lwddlak malagrm.ad. Qu W Base FM" E4avaban .6&- on Ina map apply aey Wall-td of NmA Av=axur. wnSUF Dabno of tg3E (NAVD p6). l3.rn at mi. FIRM Nlaurd are rNI caa Yar teed .k .Iim are aNp tNlved.d n 4. stanmary OF $IONA Emil'" I.ok r a, Fkea hyl3rrlele Sisley Repae wAle hm•ditfim, Curate 9- in Ihs 3_1V ae Ste -to E1rr.ekns lade Mould 6e.0 for _rod Ind fa rtheeplain m.n.gwnmo pvppus Trtwn Chair FSs MON? NINan Is1rr,N ,h,Z on this FIRM" II-dann .1 tea 000"Ayf van ea -MAW .t can are%ws. and raerpal. eekreen sisM MpOA4 The Ire, is ware baud ea hydrs.L. Wratderallans v repaid to rasldree,r b OF I" flivil t Floodbrqurana P Ogmrv. FlMdw'Ay wild and a", y,f , Ileeeway data Fie pravldad w Ihr Mova InWar o EWly Ref for this jurlsdlcllon Certain areas not In S1xer11l Fkad H .Fdl P.aa may ba prcteclad by flood on structures. Referlr S.-2."4wd Pralcalon Mea.uras' of1M Flood Insures Study Report Nr info-b n on flood conlrol stmstursa for this jurlsdlGlon- Th4 WOlrclmn was! w IN: PRO- of IM map was UMeru1 Tnnrae Ne[ulee WWI are. 10- The hoalienlal datum wa4 NAD W, GRS 19dp .pherdad, Ik'.erdnee3 m dallAn. spNfNG pre)etllan a UTM aeon u.rd In pee paduc er FIAMa Orr ad)wars {fact", RnF may reeve L..Ighl O.W..1 dsT.fanaean map lrmwrF AtlWj MOw0l4M.- TNduwflO__dd affect the accuracy OIhls FIRM Frobrdrtahsrd ns on Ihta map ae ctxwud#Nthde10Nostrtmh cANmrNeranadn yWOMazWUI eDleavluan 111E"nTh. Foodelevallns htl W the u wrtlp.l datlm. Far Information regarding co bVNO" INm,m d O.adMc VON" Osturll of 1929 and the North Amea Vertical Datum of lealt, visit the Nabnsal OaadAN Survey webslte �i(grtem or wnlad the National Gpdnlc Survey al the follov address: NGS Information Services NOAA, N;NGS12 National Geodetic Survey SSMC-3, R9202 1315 East-West Highway Silver Spring, Maryland 20910-32E2 (301) 71341242 lb ab k ppfsel eJ... �dewlpdhn, sne.Nrreaaban MLpne.ven Wbrash I" Mown an this map, please contact the attelmslwrt os 9.WIya Bh eI IN NW G,,detic Survey at 13.11710-3242, VN es webatle at Anse Map inrgaal io. shown an this ;49M can denved tom m0ONr W,al ease map 14F were provided In dgltal fm NF by Xing County GI S, Yap ONR, Y&I and Pit- Cau11Y VA. This wh mallon was mrsial" at Wines 01 PA 2.WO la 2., during the lime period of 1994-2012. ThE p10111. bnHhs" depicted on m map npnesnl IN RyM.v9bmerdrfzlq ban Vtal malchz. hood pvPOkr M 1N FIS frism 1. As a r4u16 of NeprM4dFa:w-pNe r IN. want basalt". In Wrm. asn. may atvwls slgnilway from teem, the mnienine or appear outside the SFHA, Trvs map rHeCamvo dorOaE aFd sIppa--W. ahem aha t aahWOV a thou atterxe wa Ylr o+ea9owd FIRM MT pMs j1.3.metian. TN 1pedp IM Sa kvars TNF can. IT rarrad Lam IN. pn'fr,la FIRM may haw b..n ..'jv b eanNAn w T40new ,,a se t•YI.I.Im -aNv bans. At , r.ra Flood Pro" hod Ffpedw.r ON. Mlmrd W mJhP. •fief. n ME F' LrFMNnu 6Ed4, IL,,o MNh epnhllra luthardalm hyd-ft snot may re rlerrm (IrMnn yNsneea IN1.star lxam what i. Drown on lade mAp. Owparale pmdr Mace Ee pa map an M ail an py bAal data aw4.bk n m I or IIIhw 'ENWuu Cis r. dw Rmr„ 1s aanlry pees m d>ba- may 0 eesumd Oera Mp wa. pwA*hed. IA.p Msars should OW"Cl apprap umenuisty swats 1.1" ounenl IisgxarAls loos N ARI.- Raw ralu w the wpsrayey p1114I MSP India ro ana map e! eauny Whewmp Ih. Xryeat a map P.ru m,Iw"Y map e1paslwT AddWO ones Waling dl r1rarnv'bn tam. mrwfa:r19 Ralian it flood Inaursrsp. Prvq dale , I. rid, 0mmun4.. dal naYoung OF ma "rid. 4. Mrdh east epmml Is located For Information on available produce -crated With this FIRM vise the 3cwiee Cader IMSC) w.b[ae al EEp K(�^eF,YIL- AvaiNblo products .syyde pronsuo, Issued lltars N Flap CNng." a sloes Inwrsnu Study Rel aWNI d'yl"l vsOlon. m 11r. maP harry• at Uses. products tan be orders Obtained dlr,dly from the MSC webslte. U feu nave questions abets Pala map. here b atdE, p. Ea ts, or the 9.0 Fbed Inwly- pro*- In genrr.g otiose d W FLMA Map InfotmA rxehmeq. 1.1 AI 1;rY.FEMA-hj [1.p77.)]0.NOTy w visit the FE webslte at Jh A ' ZONE VE ZONE AE GwV,t l ar r)uP4r9'a IEL 15) (EL A) a38-E s3900PnE I40" ZONE VE s44°p°"E s410°o"E IEL 15; s4240eiE °4304OiE s45p0enE s46woeE 72TO0'00' I F Y:SSM mI AoOFS [V+35tN sT PAf[EL O950 . 122- 22' 3T 0' 2Z 30' e7-r_m' xnNEYE�' 1_ZONEA _r - C •. ._ •,gl Iy N '---IO_YE �f 5r ysEf„7:rAw aw MIFiBt k,tx •F). 0.xvlir I. . .'�+r . '`:• .. 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FLOOOWAY AREAS IN ZONE AE fro lbw=f r e ue reread r, flow ea s.m aalarmt n�. amasmN r x tax arc 9r em,aLerm mpe[W IN v.yalaulre need vn he cNW whhodlalLV.lelhlvgN.w rope ne/hn OTHER FLOOD AREAS ZONEx Ap.eMa}NewlrAsver soeq MaMw.erlt, ftooa with Or YM 1M MaIW YIe oo,dnls9uan OTHER AREAS soar% Ain drr Seth 0 w-k lho^a..I hones sbooK' ZONED Nam In Mlsh flood Nxa ,urdst!nalrad, but po¢Ibk ® COA57AL BARRIER RESOURCES SYSTEM (®RS) AREAS CTHEtWLSE PROTECTED AREAS (OPAs) Cs. ales antl OPAs ale-Ah,_c w.I. mmlasenl I. Sudal Rom Ha mNear 1%Amin Olanee Rampwh Boundary a]N AresVPeere rsgalr sMeerrl �- HmawarhounNry _-._�- uneomnnaen ®RS am OPA -dam Muaa,f, �rxM dorms fVlaa rl,In NV Zona Bea Clan dMw95,aw Iayy IRePeAan d anertnt bsse rkW tkemns, Aamar3awarlr vzb a -513-""` ru From Ek oneana valve; eW.-In fee" IEL 9a11 nose Rood E.... valve wherea,salw..a*,e'M, het- 'A1IaenMrtMIsv*sa 's hv+he pawns Ial A A UmssaMn re -----@ mmem one 45 02'OT. 93 M 1S ,m phli M) WI.- home d to the NoM Amervnn Datum d naa" N NfaMlryunrJ Tlrw.raa l #Ia, W •e�aed, To OXAnr. X Boom lmlR(sae vpwluWn hNetabVsen seabnel thb FIRM prcg -M1.5 PNerMr MAP REP09TORIES Raa to MlpI11- ksllm pee Mapinaez EFFECTNE DATE llF COUNTY'MOE ROOD INSLRANCE RATE MAP 9e0emba R, ta. ex+�lralrl Fm»RLvaFrma:arla' �. to TIe93 tOIN rrf4.sq • wupp S,Y rano Fle,oets,a r raw ealn'ea neat U e,i4eeewuaarpr z,r. N,NsvN eersaamwew .wedds� w suss lr.r,ar rn wnenunmmvl.n pnr�r, avp lwrlydtlempor'.', Ma'mne Canmunm Izs Ir.r, ry IetleiWd inn alalrsaa•w gum Iepvt IorryYp tam. Taddameaaer4e¢a� A rvllse n h¢eawl.ME eV led your I�nnee agent acdlthe NlsAErd,ert'rvYb.awry dt tlifs4i10 MAP SCALE 1- = 2000- 1ma o woo 4No nor rrElGtr 400 0 400 1Z00 PANEL1225G L L - FIRM n,. FLOOD INSURANCE RATE MAP KING COUNTY, Fee WASHINGTON ^ AND INCORPORATED AREAS n ,I ,j PANEL 1226 OF 1700 (SEE MAP INDEX FOR FIRM PANEL LAYOUT) S9tlINtLY COMMUNIry bl' lN9E6 E9N8_ a'R r n rxp worm OF sooml Its n PRELIMINARY FEBRUARY 1, 2013 Not lMI, User. The Map Number shown below should be used when pbang map orders; the Community Rumber r n above should be used on Boer app[eallo" far the subject mm uniy.m MAP NUMBER =a N 53033CI225G o, MAP REVISED Federal Emergency M... 9MFe tAgency ,