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15-106227Jim Ferrell, Mayor December 29, 2015 Mr. William Appleton, Deputy Public Works Director City of Federal Way Department of Public Works FILE 33325 8th Avenue South Federal Way, WA 98003 Re: File #15-106227-00-AD; COMMUNITY DEVELOPMENT DEPARTMENT RESPONSE South 344th Street Stream Verification 1150 South 34411, Street & 1200 South 348th Street Dear Mr. Appleton: On December 9, 2015, the City of Federal Way received the Technical Memorandum regarding a Wetland/ Waterway Delineation, dated December 1, 2015, prepared by Landau Associates. The memorandum addresses two properties, King County Parcels 2021049099 (1150 South 344th Street) and 20210491.21 (1200 South 344th Street). Per the report, "...the findings of this report are that Waterway A is interpreted as a Type F stream and is subject to regulation by the City, WDFW, and/or the USACE. Pursuant to Chapter 19.145.270 of the FWRC, Waterway A is prescribed a standard buffer of 100 feet." The city reviewed the memorandum and concurs with the stream classification and associated buffer as it relates to these two properties. Should you have any questions about this letter, I can be reached at stncev.welshaci offederalway..com_, or 253-835-2634. Sincerely, Stacey Welsh, AICP Senior Planner enc: Landau Associates' December 1, 2015, Technical Memorandum Doc. I.D. 71736 33325 8th Avenue South, Federal Way, WA 98003-6325 (253) 835-7000 www.cityoffederalway.com Technical Memorandum TO: William Appleton RECEIVED DEC 0 8 2015 t CDS City of Federal Way Deputy Public Works Director/PAEC Project Director FROM: Jamie Sloan and Steven Quarterman DATE: December 1, 2015 RE: Wetland/Waterway Delineation King County Parcel Nos. 2021049099 and 2021049121 South 3441h Street Vicinity Between 91h Avenue South and State Route 99 Federal Way, Washington Introduction The City of Federal Way (City) is in the process of right-of-way acquisition of King County Parcel 2021049121 located north of South 344th Street between 9th Avenue South and State Route 99 (Figure 1). The City would like to determine the extent of applicable critical areas on Parcel 2021049121, which includes evaluation of fish habitat of a stream documented on Parcel 2021049099 (both parcels are, collectively, the project area; Figure 2). In addition, the City has identified a potential fish passage barrier downstream of the property between South 344th Street and South 348th Street. Landau Associates conducted an evaluation to assist the City in determining the extent, location, and classification of wetlands, waterways, and/or their buffers in and adjacent to the project area, which may be regulated by local, state, and/or federal agencies, and to evaluate barriers to fish passage downstream of the project area. Site Description The project area is located within the Puyallup/White watershed (Water Resource Inventory Area 10) in Section 20 of Township 21 North, Range 4 East, and consists of approximately 1.6 acres (Figure 2). In accordance with City of Federal Way Revised Code (FWRC) Section 19.145.410, the study area, which encompasses those areas within 225 feet of the project area, is included in this investigation (Figure 2). The study area consists of undeveloped land, commercial developments, and portions of South 344th and 343'd Street. Methodology Landau Associates conducted this wetland investigation in accordance with the US Army Corps of Engineers (USACE) Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region (USACE 2010), which has been adopted by the Washington State Department of Ecology (Ecology) under Washington Administrative Code (WAQ 173-22-035. The investigation of waterways was based on the methodology provided by Ecology's Determining the Ordinary High Water Mark on Streams in Washington State (Olson and Stockdale 2008). The USACE and Ecology recommend a preliminary data gathering and synthesis of available background information, followed by a field investigation. n LANDAU ASSOCIATES 130 2nd Avenue South • Edmonds, Washington 98020 • (425) 778-0907 Landau Associates Background Information Review Landau Associates reviewed the following public domain resources to determine existing conditions and potential wetlands and waterways within the study area: • Aerial photograph (Esri 2015; Figure 2) US Geological Survey (USGS) topographic map (USGS 2013, Attachment 1-1) • US Fish & Wildlife Service (USFWS) National Wetlands Inventory (NWI) map (USFWS website 2015; USFWS 2010, Attachment 1-2) ■ City Critical Areas Map (City of Federal Way 2012) + US Department of Agriculture (USDA), Natural Resources Conservation Service (NRCS) Soil Survey Geographic Database for King County (USDA, NRCS 2006, Attachment 1-3) • National Hydric Soils List (USDA, NRCS 2014a) • Flood data (FEMA 1996, Attachment 1-4) • Precipitation data (USDA, NRCS website 2015) • Washington Department of Fish & Wildlife (WDFW) SalmonScape (WDFW website 2015). • Washington Water Quality Assessment and 303(d) List (Ecology website 2012). Wetland Identification and Classification Landau Associates conducted a wetland delineation of the project area to characterize wetlands for the purpose of determining wetland classification. The USACE outlines a three -parameter approach to determine the presence or absence of wetlands, which requires evaluating vegetation, soil, and hydrology (Table 1). For wetlands located outside the project area, a cursory determination was made based on vegetation and indicators of hydrology (such as standing water or water marks, or indicators of the vegetation community), as well as background information. Waterway Identification and Classification Where accessible in the study area, the ordinary high water mark (OHWM) of waterways was identified in accordance with methodology developed by Ecology (Olson and Stockdale 2010). The methodology focuses on examining existing hydrologic data and observation of field indicators including hydrology, soils and sediments, vegetation, and marks of scouring, etc. The boundaries of waterways extending outside the study area were estimated based on views of vegetation and hydrologic indicators from the study area and based on aerial photographs and/or other information from the background information review. Stream type is based on Section 19.145.260 of the FWRC, where streams are classified in accordance with the Washington State Department of Natural Resources water typing system (WAC 222-16-030). Stream classifications include: Wetland/Waterway Delineation King County Parcel Nos. 2021049099 and 2021049121 2 December 1, 2015 Landau Associates • Type 5: Streams inventoried as "shorelines of the state" under Chapter 90.58 of the Revised Code of Washington (RCW) and the rules promulgated pursuant to Chapter 90.58 RCW ■ Type F: Streams that contain fish habitat ■ Type Np: Perennial non -fish habitat streams ■ Type Ns: Seasonal non -fish habitat streams. WAC 222-16-030 identifies fish habitat as "...habitat which is used by any fish at any Life stage at any time of the year, including potential habitat likely to be used by fish which could be recovered by restoration or management and includes off -channel habitat." According to WAC 222-16-030, the Interim Water Typing System established in WAC 222-16-031 is to be used until the "fish habitat water typing maps" are adopted by the state Forest Practices Board. Water type descriptions summarized from the Interim Water Typing System are as follows: • "Type 1 Water" means all waters, within their OHWM, as inventoried as "shorelines of the state" under Chapter 90.58 RCW and the rules promulgated pursuant to Chapter 90.58 RCW, but not including those waters' associated wetlands as defined in Chapter 90.58 RCW. • "Type 2 Water" means segments of natural waters that are not classified as Type 1 Water and have a high fish, wildlife, or human use. These are segments of natural waters and periodically inundated areas of their associated wetlands. • "Type 3 Water" means segments of natural waters that are not classified as Type 1 or 2 Waters and have a moderate to slight fish, wildlife, or human use. These are segments of natural waters and periodically inundated areas of their associated wetlands. • "Type 4 Water." means all segments of natural waters within the bankfull width of defined channels that are perennial non -fish habitat streams. Perennial streams are flowing waters that do not go dry any time of a year of normal rainfall and include the intermittent dry portions of the perennial channel below the uppermost point of perennial flow. ■ "Type 5 Waters" means all segments of natural waters within the bankfull width of the defined channels that are not Type 1, 2, 3, or 4 Waters. These are seasonal, non -fish habitat streams in which surface flow is not present for at least some portion of the year and are not located downstream from any stream reach that is a Type 4 Water. Type 5 Waters must be physically connected by an aboveground channel system to Type 1, 2, 3, or 4 Waters. Conversion of the interim water typing system to the permanent water typing system, as provided in WAC 222-16-031, is as follows: Wetland/Waterway Delineation King County Parcel Nos. 2021049099 and 2021049121 December 1, 2015 Landau Associates Water Type Conversion Permanent Water Typing Interim Water Typing Type "S" Type 1 Water Type "F" Type 2 and 3 Water Type "Np" Type 4 Water Type "Ns" Type 5 Waters The conversion listed above was used in applying the state typing system to the FWRC. For the purposes of this investigation, we applied criteria for presumed fish use, as presented in the Interim Water Typing System (refer to description of Type 3 water). Fish presence was not confirmed due to assumed absence of resident fish in the project area and assumed downstream fish passage blockages (e.g., culverts) that may prevent access to the project area. In accordance with WAC 222-16-031, waters having any of the following physical stream characteristics are presumed to have fish use: a. Stream segments having a defined channel of 2 feet or greater within the bankfull width in western Washington, and having a gradient of 16 percent or less b. Stream segments having a defined channel of 2 feet or greater within the bankfull width in western Washington, and having a gradient greater than 16 percent and less than or equal to 20 percent, and having greater than 50 acres in contributing basin size in western Washington based on hydrographic boundaries. WAC 222-16-031 specifies that "channel width and gradient means a measurement over a representative section of at least 500 linear feet with at least 10 evenly spaced measurement points along the normal stream channel but excluding unusually wide areas of negligible gradient such as marshy or swampy areas, beaver ponds and impoundments. Channel gradient may be determined utilizing stream profiles plotted from United States Geological Survey topographic maps." Bankfull width was measured at cross sections of the stream reach located on accessible properties in the project area. Bankfull width was identified using the guidance provided in "Section 2: Standard Methods for Identifying Bankfull Channel Features and Channel Migration Zones" of the Forest Practices Board Manual (Forest Practices Board 2004). Bankfull width for streams is the lateral extent of the water surface elevation perpendicular to the channel at bankfull depth; where bankfull depth is the estimated water surface elevation required to completely fill the channel to the point above which water would enter the floodplain or intersect a terrace or hillslope. The measurements were averaged to determine bankfull width for the potential reach of the stream within the project area. Wetland/Waterway Delineation King County Parcel Nos. 2021049099 and 2021049121 December 1, 2015 Landau Associates The calculation of stream slope was based on topographic data provided by King County iMap (King County website 2015) for comparison with the physical stream characteristics listed in WAC 222-16-031 (provided above). A definition of fish habitat is not provided in WAC 222-16-031; the definition provided in WAC 222-16-030 was applied for this study. A qualitative habitat assessment was conducted, which included characterization of in -stream large woody debris, riffles/pools, and channel bed material, and a description of observed hydrology. Water quality parameters available from the Washington 303(d) list were also reviewed as waters with confirmed, long term, naturally occurring water quality parameters incapable of supporting fish life (Forest Practices Board 2004). Fish Passage Barrier Assessment A preliminary evaluation of downstream fish passage was completed using guidance in the WDFW Fish Passage Barrier and Surface Water Diversion Screening Assessment and Prioritization Manual (Manual; WDFW 2009). Full evaluation using sampling methodology from the Manual was beyond the scope of this project, and preliminary assessment was provided based on quantitative observation of stream characteristics and limited measurements of water surface elevation change at discrete points along the stream. In general, natural barriers consist of waterfalls greater than 12 feet in vertical height or long, steep cascades without fish resting areas, which generally block upstream migration of anadromous fish (Forest Practices Board 2004; WDFW 2009). Water surface drops greater than 0.24 meters (0.79 feet) associated with road crossing structures, including culverts and associated fishways, are considered barriers to•fish passage (WDFW 2009). Results The results of the information review and wetland/waterway reconnaissance are described in the following section. Background Information Review The background information review revealed the following information related to wetlands, waterways, soils, and conditions within the study area. Wetlands The USGS topographic map, NWI map (Attachment 1), and City Critical Areas map do not identify any wetlands in the study area. Wetland/Waterway Delineation King County Parcel Nos. 2021049099 and 2021049121 5 December 1, 2015 Landau Associates Waterways and Fish Use The USGS topographic map does not identify any waterways in the study area. However, the City Critical Areas map identifies a segment of an unnamed tributary intersecting the project area (Attachment 1-2). The unnamed tributary is identified flowing to the West Hylebos Wetlands Park to the south. WDFW's SalmonScape website identifies the unnamed waterway in the study area as an intermittent/ephemeral tributary of West Hylebos Creek. West Hylebos Creek south of South 348tn Street is identified with modeled fish presence of coho salmon, winter steelhead trout, and fall chum, odd -year pink, and fall Chinook salmon. No fish use is identified in the study area. WDFW SalmonScape identifies a culvert at S 348th Street as a fish passage barrier (WDFW website 2015). The unnamed tributary in the project area is not identified on the 303(d) list (Ecology website 2012). Soils Soil information can be helpful when determining the likelihood of the presence/absence of wetlands. Hydric soil is one indicator necessary to classify an area as wetland. The Soil Survey Geographic database (USDA, NRCS 2006) identifies three soil series within the study area (see Attachment 1): The Norma (No) series consists of deep, poorly drained soils formed in old alluvium in depressions on glacial till plains and drainageways (USDA, NRCS 2001). This series is poorly drained, with a high water table as high as 1 foot above to 1 foot below the surface of the soil at times from November to April unless drained. The Norma series is included on the National Hydric Soils List (USDA, NRCS 2014a). • The Everett (EwC) series consists of very deep, somewhat excessively drained soils that formed in gravelly and sandy glacial outwash (USDA, NRCS 2014b). • The Alderwood (EwC) series consists of moderately deep to a densic contact, moderately well drained soils formed in glacial drift and outwash over dense glaciomarine deposits (USDA, NRCS 2014c). The water table is at its highest from January through March. The Everett-Alderwood gravelly sandy loams, 6 to 15 percent slopes (EwC), are classified as hydric on the National Hydric Soils List (USDA, NRCS 2014a) in areas that contain components of the Norma, Tukwila, and Seattle soil series located in depressions. Floodplains The Q3 Flood Data, King County, Washington (FEMA 1996) show that the nearest 100-year floodplain is located approximately 3 miles southeast of the study area (see Attachment 1). Land Use Aerial photography identifies mainly undeveloped areas (i.e., forest), along with commercial properties in the study area and project vicinity (Figure 2). Wetland/Waterway Delineation King County Parcel Nos. 2021049099 and 2021049121 6 December 1, 2015 Landau Associates Precipitation Precipitation data indicate that recorded precipitation levels in the vicinity of the study area were wetter than normal for the 3-month period prior to the field investigation (Attachment 2). Field Investigation Landau Associates ecologists Steven Quarterman and Jamie Sloan conducted a field investigation on November 20, 2015. The weather during the site visit was sunny. One sampling point was recorded in an area suspected most likely to meet the mandatory wetland criteria, but was determined to be upland. Detailed information on soils, vegetation, and hydrology was recorded at this sampling point. The boundaries of the unnamed tributary (Waterway A) were delineated, and boundaries extending off the site were estimated based on the aerial photograph (Figure 3). A summary of the unnamed tributary within the study area, including classifications and buffer requirements, is provided below. The completed data sheets describing the sampling point and site photographs are provided in Attachment 3 and Attachment 4, respectively. Uplands Uplands in the project area are characterized by sampling point SP-1 (see Figure 2 3 and Attachment 3). Vegetation was dominated by Himalayan blackberry (Rubus armeniacus, facultative upland [FACU]), which does not satisfy the hydrophytic vegetation parameter. No evidence of hydrology was identified at the sampling point, and hydric soils were not observed. In general, soils were dark brown (10YR 3/3) in the upper 9 inches with gravel beneath (Munsell Color 2009). Other vegetation present in the project area includes salal (Goultheria shallon, FACU), western red cedar (Thuja plicota, facultative [FAQ, black cottonwood (Populus balsamifera, FAC), Pacific madrone (Arbutus menziesii, no indicator [NI]), Douglas fir (Pseudotsuga menziesii, FACU), English ivy (Hedera helix, FACU), and Oregon grape (Mahonia aquifolium, FACU). Waterway A An approximately 150-linear-foot segment of Waterway A (flags OHWM-1A to OHWM-12A) was delineated within the study area (Figure 3). Waterway A is identified on City critical areas mapping, and is identified as an intermittent/ephemeral waterway on the WDFW SalmonScape website. William Appleton, the Deputy Public Works Director for the City, indicated that the waterway is seasonal (i.e., intermittent) (William Appleton, pers. comm.). As discussed above, no fish presence is documented in the segment of Waterway A in the study area, although modeled presence is identified by the WDFW SalmonScape website south of South 348th Street. Wetland/Waterway Delineation King County Parcel Nos. 2021049099 and 2021049121 7 December 1, 2015 Landau Associates Within the project area, Waterway A has been channelized and is confined between relatively steep banks reinforced with quarry spalls. The side slopes of the bank of Waterway A are vegetated with trees, shrubs, and groundcovers, including, but not limited to, red alder (Alnus rubro, FAC), Scouler's willow (Salixscouleriana, FAC), Himalayan blackberry, and English ivy. Areas of riffles/pools and woody debris were observed in Waterway A; stream substrate consists of gravel/cobbles. The measurements of 10-bankfull-width cross sections (spaced at approximate 50-foot intervals) across an approximately 500-linear-foot segment of the stream channel revealed an average channel width of 9.4 feet (Table 2). Cross-section measurements started 50 feet upstream of the culvert at South 344th Street and were spaced approximately 50 feet from one another. Debris dams were present along the stream segment evaluated; cross sections were located to avoid the dams. Surface water was present at the time of the field investigation, and water depths ranged between 6 and 19 inches at each cross section. The slope of the waterway in the project area is approximately 1 percent. Downstream Passage Evaluation A series of grade control structures was observed downstream of the culvert conveying Waterway A adjacent to 11th Avenue South. The grade control structures consist of a series of wood and boulder weirs. Water surface elevations were estimated at the two structures farthest downstream. The farthest downstream weir appears to be constructed of boulders, whereas the subsequent upstream weir is a log. The difference in water surface elevation at the boulder weir is approximately 2 feet, and 1.6 feet at the log weir. The WDFW SalmonScape website does not identify the grade control structure as part of a fishway associated with the South 344th Street culvert. The grade control structure may have been designed to facilitate fish passage and/or control erosion. It is unknown if grades prior to installation of grade controls in the downstream segment of Waterway A were a natural barrier to fish passage. However, in the existing conditions, the water surface drop at the farthest downstream weirs are barriers to fish passage, according to criteria in the WDFW Manual (WDFW 2009). Waterway Determination Waterway A, as existing on the date of the field survey, is a presumed intermittent waterway. Physical stream characteristics observed (i.e., slope, width, presence of habitat features) allow a presumption of fish use. While downstream fish passage barriers exist downstream of the project area, these blockages are man-made features. Resident fish can exist upstream of blockages so the mere presence of a barrier is not proof of fish absence (Forest Practices Board 2004). Because Waterway A contains physical stream characteristics for presumption of fish use, the waterway is classified as a Type F stream, which requires a standard buffer of 100 feet in accordance with Chapter 19.145.270 of the FWRC. Wetland/Waterway Delineation King County Parcel Nos. 2021049099 and 2021049121 8 December 1, 2015 Landau Associates Regulatory Assessment As indicated in the FWRC, "stream" means a course or route, formed by nature, including those that have been modified by humans, and generally consisting of a channel with a bed, banks or sides throughout substantially all its length, along which surface waters naturally and normally flow in ' draining from higher to lower elevations. A stream need not contain water year-round. In a development, streams may run in culverts or may be channeled in a concrete, rock or other artificial conveyance system. This definition does not include irrigation ditches, stormwater facilities, or other artificial watercourses unless they are used by resident or anadromous salmonid fish, or the feature was constructed to convey a natural stream that existed prior to construction of the watercourse. Those topographic features that resemble streams but have no defined channels shall be considered streams when hydrologic and hydraulic analyses done pursuant to a development proposal predict formation of a defined channel after development. For the purpose of defining the following categories of streams, normal rainfall is rainfall that is at or near the mean of the accumulated annual rainfall record, based upon the current water year for King County as recorded at the Seattle -Tacoma International Airport. Because Waterway A has a defined bed, bank, and OHWM, it is a critical area feature regulated by the City. Waterway A also satisfies the criteria as a water of the state. Any work that will use, divert, obstruct, or change the bed or flow of state waters, including streams and rivers, must do so under the terms of a Hydraulic Project Approval (HPA) issued by WDFW, which is administered under RCW 77.55 and rules set forth in WAC 220-110. Based on guidance developed by the USACE and US Environmental Protection Agency (EPA) (USACE and EPA 2007), the agencies assert jurisdiction based on adjacency and significant nexus to traditional navigable waters. Waterway A may be a jurisdictional "waters of the US" due to possible connectivity to Hylebos Creek, which drains to Puget Sound. To make its jurisdictional determination, the USACE will evaluate the indicators of the relative permanence of flow and significant nexus of the wetlands and waterways identified in this report. The information provided in this report is presented to assist the agencies that are ultimately responsible for determining jurisdiction. The jurisdictional determinations made by the City/USACE can be amended to this report or documented in another agreed -upon format. Conclusion As stated above, the findings of this report are that Waterway A is interpreted as a Type F stream and is subject to regulation by the City, WDFW, and/or the USACE. Pursuant to Chapter 19.145.270 of the FWRC, Waterway A is prescribed a standard buffer of 100 feet. Wetland/Waterway Delineation King County Parcel Nos. 2021049099 and 2021049121 9 December 1, 2015 Landau Associates Use of this Technical Memorandum The findings presented herein are based on our understanding of the FWRC, the USACE wetland delineation methodology, Ecology OHWM delineation methodology, and our interpretation of the vegetative, soil, and hydrologic conditions observed during the field investigation on November 20, 2015. This technical memorandum was prepared for the use of the City of Federal Way and applicable regulatory agencies. No other party is entitled to rely on the information, conclusions, and recommendations included in this document without the express written consent of Landau Associates. Further, the reuse of information, conclusions, and recommendations provided herein for extensions of the project or for any other project, without review and authorization by Landau Associates, shall be at the user's sole risk. Potential wetlands/waterways identified by Landau Associates are considered preliminary until the USACE and/or local jurisdictional agencies validate the boundaries. Because wetlands are dynamic communities, wetland boundaries may change over time. The agencies typically recognize wetland delineations for a period of 5 years following an approved jurisdictional determination. In addition, changes in government code, regulations, and/or laws may occur. This document has been prepared under the supervision and direction of the following key staff. LANDAU ASSOCIATES, INC. S#ven . Quartefarnan Associate Ecologist SJQ/ccy P:\238\068\R\LAI Fed Way Wetland Delineation_tm - 12-01-15 docx Wetland/Waterway Delineation King County Parcel Nos. 2021049099 and 2021049121 10 December 1, 2015 Landau Associates References Ecology website. 2012. Water Quality Assessment and 303(d) List. http://www.ecy.wa.gov/programs/Wq/303d/index.html. Washington State Department of Ecology. Accessed November 23, 2015. Esri. 2015. World Imagery Map Service. htt www.arc is.com home item.html?id=10df2279f9684e4a9f6a7f08febac2a9. Last modified October 30. Federal Way, City of. 2012. Critical Areas Map. Available at: http://www.cityoffederalway.com/index.aspx?nid=321. September FEMA. 1996. Q3 Flood Data, King County, Washington. ARC/INFO Coverage. Federal Emergency Management Agency. Washington, DC. Forest Practices Board. 2004. "Section 2. Standard Methods for Identifying Bankfull Channel Features and Channel Migration Zones." Forest Practices Board Manual. htt www.dnr.wa. oV BusinessPermits To ics ForestPracticesRules Pa es f board manual.as x. November. King County website. 2015. King County iMap Interactive Mapping Tool. http://www.kingcounty.gov/or)erations/GIS/Maps/iMAP.aspx. Accessed November 23. Lichvar, R.W. and J.T. Kartesz. 2009. North American Digital Flora: National Wetland Plant List. Version 2.4.0. Available at littr)s://wetland—plants.usace.arrny.mil. Cold Regions Research and Engineering Laboratory, Engineer Research and Development Center, U.S. Army Corps of Engineers. Hanover, New Hampshire, and The Biota of North America Program, Chapel Hill, North Carolina. Munsell Color. 2009. Munsell Soil -Color Charts. Grand Rapids, Michigan: Munsell Color Olson, P. and E. Stockdale. 2008. Determining the Ordinary High Water Mark on Streams in Washington State. Publication No. 08-06-001. Washington State Department of Ecology. Olympia, Washington. April. USACE. 2010. Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region (Version 2.0). Technical Report ERDC/EL TR-10-3. US Army Corps of Engineers Research and Development Center Environmental Laboratory. Vicksburg, Mississippi. May. USACE. 1987. Corps of Engineers Wetlands Delineation Manual. Technical Report Y-87-1. US Army Corps of Engineers Waterways Experiment Station. Vicksburg, Mississippi. March. Wetland/Waterway Delineation King County Parcel Nos. 2021049099 and 2021049121 11 December 1, 2015 Landau Associates USACE and EPA. 2007. Clean Water Act Jurisdiction Following the US Supreme Court's Decision in Rapanos v. United States & Carabell v. United States. US Army Corps of Engineers and US Environmental Protection Agency. June 5. USDA, NRCS. 2014a. National Hydric Soils List. Available at htt www.nres.usda, ov w s ortal nres main soils use h dric . US Department of Agriculture, Natural Resources Conservation Service. Fort Worth, Texas. USDA, NRCS. 2014b. Everett Series. Available at http://www2.ftw.nrcs.usda.gov/osd/dat/E/EVERETT.htmi. US Department of Agriculture, Natural Resources Conservation Service. USDA, NRCS. 2014c. Alderwood Series. Available at http://www2.ftw.nrcs-usda.gov/osd/dat/A/Aiderwood.html. US Department of Agriculture, Natural Resources Conservation Service. USDA, NRCS. 2006. Soil Survey Geographic Database for King County. Available at htt soiIdatamart.nres.usda. ov. US Department of Agriculture, Natural Resources Conservation Service. USDA, NRCS. 2001. Norma Series. Available at htt www2.ftw.nrcs.usda.gov/osd/dat/N/NORMA.htriii. US Department of Agriculture, Natural Resources Conservation Service. USDA, NRCS website. 2015. Climate Data for King County, Washington. http://agacis.rcc-acis.orR/53033/wets. US Department of Agriculture, Natural Resources Conservation Service. Accessed October 4. USFWS website. 2015. National Wetlands Inventory. http://www.fws_eov/wetlandsIDataZMapper.htmi. US Fish & Wildlife Service. Accessed October 4. WDFW. 2009. Fish Passage Barrier and Surface Water Diversion Screening Assessment and Prioritization Manual. Technical Applications Division, Washington Department of Fish & Wildlife. Olympia, Washington WDFW website. 2015. SalmonScope. Litt ap s.wdfw.wa. ov salmonsca a ?id=8. Washington Department of Fish & Wildlife. Accessed November 23. Wetland/Waterway Delineation King County Parcel Nos. 2021049099 and 2021049121 12 December 1, 2015 Landau Associates Attachments: Figure 1: Vicinity Map Figure 2: Study Area Map Figure 3: Environmental Features Map Table 1: Methods for Wetland Determination Table 2: Bankfull Width Measurements Attachment 1: Background Review Attachment 2: Precipitation Data Attachment 3: Data Forms Attachment 4: Selected Site Photographs Wetland/Waterway Delineation King County Parcel Nos. 2021049099 and 2021049121 13 December 1, 2015 Cefebratbm Park it Project Location f �q a 99 m S 348rh St _ Federal ay The Commons at Fedoral way West!Hyfebcs C eak r m j 0 1 a 0 05 1 Miles Data Source: Esri 2012 Wetland Delineation King County Parcel Nos. LANDAU 2021049099 and 2021049121 ASSOCIATES Federal Way, Washington ntho Pork Est ,,. Lakeland South iT'acoma Praject t.DCatien Spokane olvmpia Washington Vicinity Map Figure 1 G �ProgcaV?l10ee4Wenene Dclneaan+F075wdyNrerMD mad iiAWMS NAD 1993 HARN SUtORAnr v.4v' giQn Soum ri —ur veer N s m►d st 20219+53727 RORSOA9D93 s 3aath St 1j L_eyeend N 1. Black and white reproduction of this color Q Project Area original may reduce its effectiveness and 0 Study Area lead to incorrect interpretation. Tax Parcels Data Sources: King County GIS; Esri World trnagar�, 2013 0 150 300 Wetland Delineation Figure King County Parcel Nos. Study Area Map 1ALANDAU Scale in Feet 2021049099 and 2021049121 ASSOCIATES Federal Way, Washington 4r Approximate Local] on of In Stream Grade Control Structures. r a' Legend • SamplePlot Q Project Area — Streams (Federal Way) M Study Area Standard Waterway Buffer ® Grade Controls 0 250 500 LANDAU ASSOCIATES Scale in Feet S 34A1h $1 ID Notes 1. Waterway and sample plot locations are approximate. 3. Standard waterway buffer shown 2. Waterway and buffer extend beyond project area. 4 Black and white reproduction of this color original may reduce its effectiveness and eta Sources: Kng Court GIS: Esri V117r1d Imo 2013 lead to incorrect interpretation Wetland Delineation Figure King county Parcel Nos. 2021049099 and 2021049121 Environmental Features Map 3 Federal Way. Washington Table 1 Methods for Wetland Determination qng County Parcel Nos. 2021049099 and 2021049121 Federal Way, Washington Parameter DeOnMon Field Indlato,s Field Assassin — Welland Vegebllpn Wetland vegelatlon badapled nsat__sM..din— The MArmy Corpsol Engineers (USACEI has More than 50 percen[ol the —In— piano nbletl hom allvegeedm strata are Oominana: Thedoml— planband(W,weWntllndlcanrsbNsare ev 1.— quanlielively ssigned a welbntl indic-,Wrack planlsp— tllatdenol. It bequenry of ac ,.— IMln hydrpphydc,I ,flhedes — MU, lMion. or OBI, FAM, or FAC(rtgardless of wlMin dab pbbandvisually lM1roughou[Me sNdYarea ll Me [.[brdominanceblls,and lndlalpb wetlands I-- and garl.z 3009), Theuare: maaiflerl, of wed -.II and hydrology are p,esent, the Prevalenu Intl. isal .1— Odiple (OBL) wetland planb usmlly wmr In weWnds under nabral wMlUons (more Man 99 peranl al Me time) Arplanl ...unity ass vhually esllmadd rover percentage of MLaM MM sped. Prewleme Ind.: A welgh4d average of Me perantcw.lo, each Indian, status lsolcuwh,dlI ee FacultaWewellandj—)pl—...Ily arurin wetlands(67 b 99 p.cenlof Me lime), onion that nceetls the coverage of FACU and UPLsperies ll daminanw bnplmel, Me masI—Ily louts In son -wetlands. P knce I—t alwland, or mnslderatlon t given b mo,phobglol adapbdoas and/Orson-auulr planb oburved doe sheeb In AWchmwl 3 of fhb lechniolmemorantlum)Anindeeof—I—hmnsldered [ing the hydrrpM1yde vegebHon cibrlon If the Prey k— IM. t no[ me[, Men mnsitlera don is Fzculladve(FAC) planb a,e equally RWV n—In wetlandscanon-wetlwtls(341066 percent al given 1. —MWh glal atlapitfitt nd/or non vaxular planb the dme) Mmpholagial Adaptatlons/Non-Vascular Plano: Some pWnb develop rmognioble morphaloglol Faculwfly upland (FACU) III— Or occur in on wetlands, but are wrasbnally found in wetlands(110 33 1 of Me lime). wdapfalwss g iy—M Iw Obliple upbnd(UPL)planb usually mmr In pl.- I.— than 99 percent al Me Ume) .de I,sl,ataKV 6-0 Wade %"Inanarea where 1-- of hydric roil and wetland -Isisa pleb rrs,w. e2htLeg Aeewetebb, A.aaw.Qui 11-0 Y. Imo rwFmc yellaw�bl 1M h—aI rrlYeslaagephaw must be s50 percent pf 1he YYI b-pl,,te corer in a p101 In wasel Washingbn b,.1ed wedind,i. Sollsare classified as li,dli,or 11h, possess eM1aractedslia Wlare asmeW tad w1M,edudnjgsoil Hydrl,soil M1asan Id,.-bh,cob, pa dam, whhhacmrs if Me ullbsaW.Wd, Ashwa(is mad n Mg holes at leas(2O Inch. be4r9ewt+srl9e{agil mihiiis koheea a a Pis Wetbnd Sol, roMidons AhYdric nilis lormMunderconditlonsolsaluration,llmdin8.o M.dInglongenaudi OaMed,orppndedbralong penodo111me. Falnlorwashedaulwlprs (ypkallybrm sludyarea Oiredoburva(ionofthe sail is madea[mulliplelmliamUl bpFA•wfWeds Wl�,Iw du vw9.004 leaaan0pdre4 wndb'r�w ftse Pine Mr ul In Mesoil,and—st of brightrobr, such as run(I—n as redorymorphle kabr.) tappdtbh,.561.rank--1 is determined visually and teanelly, and.11 robrb denrminM loan-umulatlmsof.,genie moiler al Mesurbce,asulhrodor, and mganle mz Wr sbins may also be p—L using the Munullnil cab, clwrt(Munull Cab,3009) Di Y waersabratlon aM/or lnundslionh oho o—d The—clerbllb pburved are compared n Me hyddc soli ndi—h,, -.1I smis; sandy soils; and"IOamycbyeyulls; as tleu 1—in Me USAGE ftionsl5upplemen[ IUSACE 2010) WMalld Hos's The area Hlnundaled either permanentlyor pe,iodially a[man water depthsl.x Man or equals TawsaarfiVe4en+s.. b,i.hpwA.d. wtlln inuntlatlon lztaMing wale,( During wnmv.Upunn,wn pit are snowed w—d! b,up n20minut.ba11w pertobdnnefany 66 feel, uturaled mil,vnl.mar4,driklines, utllmenl tlepasib,and dralitap Wderm groundwaur lnb Me pil e d—ine groundwanr lwA for the ull profile Mdliienal dlggingmsy SemndarylMlobrsoFhydrologylnclutle wa[erslained leay., oxltlized roo[channels, or 1w1-sury dabforld—filf call In Meabunceef anypdmary indicanrs, at recur W241nch.bp tluring Medq.a.nWinvesdple .ndw.lerlcvls lnadditlon, lM1e ealenl of sail sabradon and pr.ence/,ounce ofmldadon are deermined in lhesoil.—t! sport of (he LL,esplwatw4Yln,aMralriWlMlprza,rke INwldrwaszunee,n dw�agtlr lr�n[ IeastlwouwMaryindionrs ere wed bmeet Me wetland hYdrongy cdlerion- sell sample.Oth,,,mdiotorsof wetland h,a.logy areab—,,d al I,.— hit, aUSACE 19g3, 21`,' U S OeW mmenl of Agrimllure IU50AI, Natural RewurasConurvatlon Service INR6) 2011 6USACE 19BI2030. ,The growinguason It the rime during whlrh Iwo ar more nos nergreennwlH Ww aeaw gtaree n •.eaW r wnvdws aafa e.i.af swgeas eawdr. wsbn raw 9 d,Ol,ngwawsTesahaa MwnMWsea lraePnallyg YIr a—, ucsen as n'd wllrr l arts W, fade n Iror.,ryan Owlrbr,f lWeg Adlatlal. Table 2 Page 1 of 1 Bankfull Width Measurements King County Parcel Nos. 2021049099 and 2021049121 Federal Way, Washington Bankfull Cross Section Bankfull Width (ft) XS-50 9.3 XS-100 7.0 XS-150 9.2 XS-200 6.5 XS-250 10.3 XS-300 7.6 XS-356 10.1 XS-406 12.1 XS-456 8.3 XS-506 13.4 Average 9.4 Cross sections identified by approximate distance upstream from South 344th Street culvert. 12/01/15 P:\238\068\R\FedWay Wetland Delineation_tb2.xlsx Landau Associates ATTACHMENT 1 Background Review �t Legend �+ _ Note Q Project Area 1. Black and white reproduction of this color original may reduce its effectiveness and Study Area lead to incorrect interpretation. Data Sources: Klrg CoWty GIS; USGS, 2013. 0 300 600 Wetland Delineation Figure King County Parcel Nos. LANDAU Scale in Feet 2021049099 and 2021049121 USGS Topographic Map ASSOCIATES Federal Way, Washington ;.t�roecnu3atocrnvrexona ueuneaoonaui-irvwi mxa nnoreuro ry s a r1 4� PUi3HxPA8Hx PSScx� r !L F PABH PSSC i S _ .. fir Legend T Note 1. Black and white reproduction of this color Q Project Area PABH/PABHx/PUBHx - Freshwater Pond original may reduce its effectiveness and Study Area PSSC/PSSCx - Freshwater Forested/Shrub Wetland lead to incorrect interpretation. Streams (Federal Way) Dog Saumv King Couniv GM. 26t 6: CRY or Federal "V. 109 USM 206' Esd World imau vy, 2013. ❑ soo soo Wetland Delineation Figure King County Parcel Nos. National Wetlands Inventory and LANDAU 2021049099 and 2021049121 Federal Way Streams Map 1-2 ASSOCIATES Scale in Feet Federal Way. Washington J j", ,,44 Project Area 3W No - Norma Sandy Loam 0 300 600 Note 1. Black and white reproduction of this color Study Area El Sm - Shalcar Muck original may reduce its effectiveness and EwC - Everett-Alderwood Gravelly Sandy Loam, W. Ur - Urban Land Scale in Feel lead to incorrect interpretation. 6-15% Slopes W -Water Data Sources: Xing 00unly GIS, 2015; USDA NRCS, 2006; Esd World Irnagpry, 2013: InC - Indianola Loamy Fine Sand, 4-15% Slopes Wetland Delineation Figure King County Parcel Nos. $OIIS M8 LANDAU 2021049099 and 2021049121 p 1 _3 I ASSOCIATES Federal Way, Washington .__ . _..............�—� .. _..._.....•en.. ee.�� —. � ..i. enn. c •yen . ona a.e Ou c•.•.Ce... Vr..n..�.�n•�. CnnM FIPC ARfI� Fea+ } I 0 ProjectArea Q Study Area 100-Year Floodplain tiara Sources: Kin Cuun+ cis. 251S. rEMA Wetland Delineation 0 3.000 6,000 King County Parcel Nos. LANDAU 2021049099 and 2021049121 ASSOCIATES Scale in Feet Federal Way. Washington Note 1 Black and white reproduction of this color original may reduce its effectiveness and lead to incorrect interpretation. allyd Figure FEMA 100-Year Floodplain 1 _4 ATTACHMENT 2 Precipitation Data NRCS method - Rainfall Documentation Worksheet Hydrology Tools for Wetland Determination NR(S F.nwin ivvin4 Field Handbook Chanter 19 Date 11/23/2015 Landowner/Project PAR* 2021049099, 2021049121 Weather Station Seattle Tacoma Intl Airport State Washington County King Growing Season 2/6 to 12/9 Photo/obs Date 11/20/20151 Soil Name Norma Sandy Loam shaded cells are locked or calculated Long-term rainfall statistics (from WETS table or State Climatology Office) 30% 30% Condition chance chance Dry, Wet, Month < > Precip Normal 1st Prior Month* November 4.01 7.05 7.95 W October 1.90 3.87 4.81 W 2nd Prior Month* September 0.57 2.00 0.83 N 3rd Prior Month* Acomnarcd to nhotolohservation date Note: If sum is 6-9 prior period has been drier than normal 10 - 14 prior period has been normal 15 - 18 prior period has been wetter than normal Conclusions: prior period has been wetter than normal Month Condition Weight Value Value 3 3 3 2 21 1 Sum Condition value: Dry =1 Normal =2 Wet =3 Product of Previous 2 Columns 2 E WETS Table WETS Station : SEATTLE TACOMA INTL AP, WA233 Creation Date: 11/23/2015 Latitude: 4727 Longitude: 12219 Elevation: 00370 State FIPS/County(FIPS): 53033 County Name: King Start yr. -------------------------------------------------- - 1971 End yr. - 2000 1 Temperature I --------------------I Precipitation 1 I------------------- (Degrees F.) (Inches) I I I 1---------------------------------------f I 1 30% chance lavg I 1 I I I [ I will have 1* ofl avg I #------- I------- #------- f I ----------------- Idaysl total) Month 1 avg [ avg avg I avg I less I more Iw/.11 snow I I daily I daily j I I than I than 1 orl fall I I max ( min I I I I Imorel I ----------- January ~---------------------------------------------------------------I 1 45.8 j 35.9 # 40.9 f 5.13 1 3.50 1 6.12 j 12 1 2.4 1 February 1 49.5 j 37.2 1 43.3 I 4.18 1 2.65 1 5.04 1 10 1 1.3 # March I 53.2 1 39.1 1 46.2 I 3.75 j 2.71 1 4.42 1 11 j 0.6 1 April I 58.2 1 42.1 I 50.2 l 2.59 j 1.67 1 3.12 1 71 0.1 1 May I 64.4 ) 47.2 j 55.8 1 1.78 1 1.12 1 2.14 16 1 0.0 1 June 1 69.6 I 51.7 1 60.7 1 1.49 1 0.93 1 1.80 1 4 1 0.0 1 July 1 75.3 I 55.3 ( 65.3 1 0.79 1 0.41 1 0.97 j 3 1 0.0 1 August 1 75.6 I 55.7 1 65.6 j 1.02 j 0.35 1 1.23 1 3 I' 0.0 1 September j 70.2 I 51.9 1 61.1 I 1.63 j 0.57 1 2.00 j 5 I 0.0 1 October j 59.7 1 45.7 1 52.7 1 3.19 1 1.90 1 3.87 [ 8 1 0.1 1 November I 50.5 1 39.9 1 45.2 1 5.90 1 4.01 1 7.05 1 13 1 1.1 1 December ---------- 1 45.5 1 1 35.9 I 1 40.7 I------- 1 5.62 1 I-------- I-------- 3.85 1 1-------- 6.70 112 1 I___ -I 1.9 j ------I Annual ---------- ------ 1 33.34 J 40.22 I -- I---- I Average ----------I-------I-------I---------I--------1--------I--------I----I-------j I------- I 59.8 1------- I 44.8 I------- I 52.3 I-------- I --------- I------ I ------- I------ -------- ---- i I I -- I---- ------ # I Average __----____1.-_-----j-------I-------1 ----- I ----- 1 ----- I 37.07 I I ------- I i ------ ------------- 192 1 I j 7.2 I ------- GROWING SEASON DATES _..__-------------------------- I Temperature ---------------.._» 1------------------------------------------------ ------ Probability 124 F or higher 1 28 F or higher 1 32 F or higher ----------------------- I ----------------- I ---------------- - I ---------------- I Beginning and Ending Dates Growing Season Length I 50 percent * I 1/19 to 12/29 1 2/ 6 to 12/ 9 •I 3/ 9 to 11/16 I 343 days 1 305 days j 251 days I I E 70 percent * I > 365 days 1 1/30 to 12/16 1 3/ 3 to 11/22 > 365 days 1 319 days I 263 days 1 I I * Percent chance of the growing season occurring between the Beginning and Ending dates. total 1945-2015 prcp Station : WA233, SEATTLE TACOMA INTL AP ------- Unit = inches yr jan feb mar apr may jun jul aug 45 4.62 6.14 4.33 3.34 2.62 0.62 0.11 0.31 46 5.29 5.83 3.71 2.46 0.41 3.90 0.56 0.33 47 4.20 4.02 2.40 2.17 0.35 2.15 1.04 0.49 48 4.49 5.25 3.68 3.75 4.76 2.09 1.53 1.87 49 0.77 5.89 3.54 1.18 1.30 0.93 1.04 0.45 50 8.91 5.74 8;40 2.92 0.78 0.59 1.00 2.17 51 6.80 8.76 3.76 0.65 1.61 0.13 0.31 1.02 52 4.89 2.46 3.52 2.03 0.99 1.04 0.41 0.70 5312.92 3.70 3.72 2.10 2.51 1.85 0.66 1.11 54 8.36 4.38 2.07 2.64 1.89 2.44 1.46 1.57 55 3.;.35 4.30 3.25 3.64 1.95 1.27 2.10 0.17 sep Oct nov dec annl 3.51 2.32 6.31 6.31 40.54 2.58 3.22 5.53 6.47 40.29 1.84 8.95 3.62 6.02 37.25 3.85 2.33 6.06 6.13 45.79 1.43 3.85 6.78 5.30 32.46 2.30 7.21 7.98 7.14 55.14 2.03 5.87 5.44 3.92 40.30 0.32 1.29 1.11 5.02 23.78 3.28 4.43 7.22 5.92 49.42 1.68 1.91 7.67 5.20 41.27 1.52 6.60 8.96 9.50 46.61 http://agacis.rcc-acis.org/53033/wets/results[11/23/2015 7:51:06 AM] WETS Table 56 8.67 2.17 4.95 0.33 0.83 2.47 0.33 0,76 2.42 6.71 1.59 5.62 36.85 57 2.41 5.57 6.26 2-23 1.17 1.18 1.10 L.64 0.76 3.79 3.00 5.52 34.63 58 8.72 5.36 2.26 3.51 0.94 0.90 0.00 0..31 1.42 3.99 8.07 7,15 42.63 59 7.98 3.64 4.12 3.59 1.60 1.82 0.93 0.60 4.60 2.67 8.14 6'.83 46.52 60 5.48 4.01 4.08 2.88 3.04 0.70 0.00 1.92 1.17 4.22 8.03 3.75 39.28 61 7.71 9.11 4.46 2.35 3.07 0.54 0.75 0.82 0.46 3.27 4.67 5.32 42.53 62 2,43 2.29 2.86 2.03 1.82 0.68 0.69 1.96 2.31 4.16 9.34 5.22 35.79 63 2.25 4.36 3.43 3.06 0.90 1.68 1.18 0.73 0.59 5.06 9.69 5.79 38.72 64 9.76 1.66 2.96 1.56 0.91 3.82 0.99 1.23 2.27 1.00 9.65 5.53 41.34 65 5.27 3.88 0.57 3.73 1.63 0.59 0.38 2.18 0.49 2.76 4.98 7.10 33.56 66 5.43 2.31 4.38 1.99 1.35 1.15 1.35 0.42 1.77 2.92 6.85 8.31 38.23 67 9.32 2.72 3.71 2.50 0.38 2.04 0,01 0.02 0.94 6.66 2.56 4.72 35.58 68 6.90 6.08 5.08 1.33 1.67 3.02 0.83 4.58 1.93 4.32 5.86 8.55 50.15 69 5.71 3.16 2.20 3.45 2.93 0.91 0.27 0.45 5.57 1.19 2.21 5.68 33.73 70 8.22 2.26 3.16 3.31 1.17 0.43 0.48 0.32 2.23 2.52 5.03 8.28 37.41 71 5.32 4.36 7.12 2.39 1.43 2.28 0.68 0.57 3.51 3.57 5.31 6.67 43.21 72 7.24 8.11 6.74 4.12 0.69 1.81 1.34 1.13 4.10 0.72 3.38 8.98 48.36 73 4.29 1.89 1.62 1.35 1.60 2.50 0.08 0.27 1.81 3.31 7.99 8.33 35.04 74 7.78 4.01 5.84 2.39 1.37 1.25 1.51 0.01 0.21 1.99 5.06 6.45 37.87 75 6.01 5.80 2.87 2.49 1.13 0.84 0.27 4.59 0.00 7.75 5.07 7.66 44.48 76 5.55 4.74 2,71 1,67 1.61 0.63 1.17 2.71 1.25 2.06 0.74 1.86 26.70 77 1.77 1.58 3.80 0.55 3.70 0.54 0.42 3.59 2.55 2.60 5.27 6.47 32.84 78 4.30 3.59 2.43 4.19 1.79 0.75 1.40 1.19 5.95 0.98 6.05 1.37 33.99 79 2.25 5.32 1.55 0,.81 0.88 0.46 0,73 1.02 2.07 3.38 1.94 11.85 32.26 80 4.09 5.04 2.10 3.23 0.97 1.77 0.46 0.64 1.43 1.32 7.16 7.39 35.60 81 2.42 4.45 2;23 1.58 1.33 2.31 1.38 0,25 3.42 6.40 4.07 5.56 35.40 82 5.35 7.57 3.73 2.07 0.63 1.03 0.59 0.62 1.49 4.07 5.31 6.86 39.32 83 7.07 4.57 3.81 1.06 2.10 1.85 2.39 1.90 1.85 1.34 7.97 5.02 40.93 84 3.62 3.91 3,91 2.87 3.38 2.81 0.17 0.13 1.01 2.14 8.09 4.95 36.99 85 0.58 2.63 2.56 1.30 0.85 2.80 0.10 0.55 1.98 5.74 4.26 1.78 25.13 86 8.54 4.41 2.67 1.38 1.71 0.68 1.10 0.10 1.89 4.21 7.98 3.67 38.34 87 5.98 2.05 5,53 2.61 2.38 0.16 0.39 0.29 0.91 0.31 3.21 6.11 29.93 88 4.07 0.71 3-75 3.20 3.01 1.56 0,50 0.28 1.75 2.24 8.43 3.48 32.98 89 2.78 3.43 5.79 2.80 2.78 1.14 0.64 0.89 0.54 2.98 6.13 4.79 34.69 90 9.41 3.72 2.58 2.54 1.98 3.05 0.58 0.71 0.05 5.79 10.71 3.63 44.75 91 4.46 4.69 4:66 6.53 1.39 1.29 0.28 2.17 0.00 1.31 5.33 3.31 35.42 92 7.82 3.09 1.68 4.12 0.12 1.14 0.89 0.66 1.15 2.45 5.57 4.09 32.78 93 4.09 0.35 4.80 4.54 2.86 2.48 1.27 0.16 0.03 1.54 2.20 4.48 28.80 94 2.51 4.47 3.17 2.27 1.43 1.25 0.28 0.30 1.69 3.51 5.79 8.15 34.82 95 4.48 4.97 4.07 2.05 0.81 1.46 1.34 1.81 0.91 3.93 10.40 6.37 42.60 96 7.34 8.35 2:06 5.37 2.07 0.59 0.77 1.32 1.85 5.54 5.23 10.18 50.67 97 7.02 1.99 8.15 4.32 1.87 1.64 1.20 1.27 3.41 5.83 3.93 2.63 43.26 98 7.15 3.31 3.96 0.99 1.98 M1.11 0.41 0.35 0.72 3.48 11.62 8;98 44.06 99 6.84 6.95 3.66 1.49 2.12 1.86 1.18 0.92 0.17 2.26 9.60 5.06 42.11 0 3.77 5.25 2.82 1.48 3.27 1.61 0.23 0.33 1.12 3.00 3.27 2,51 28.66 1 2.70 2.07 2.73 3.16 1.39 3.05 1.03 2.32 0.83 3.13 9.26 5.89 37.56 2 5.98 4.17 2.82 4.29 1.11 1.73 0.64 0.04 0.42 0.67 3.51 5.98 31.36 3 8.39 1.76 6.34 2.74 1.16 0.51 0.06 0,32 0.89 8.96 6.77 3.88 41.78 4 6.36 2.44 2.14 0.65 2.51 0.71 0.16 3.00 2.80 2.80 3.16 4.37 31.10 5 4.44 1.20 3.71 3.68 3.32 1.63 1.03 0.29 M0.75 3.02 5.52 6.85 35.44 611.65 2.55 2.18 2.73 1.65 1.67 0.06 0.02 1.43 1.55 15.63 7.30 48.42 7 6.22 3.38 4.42 0.69 1.46 1.34 1.44 0.73 3.16 3.32 3.71 9.08 38.95 8 4.26 1.47 3.65 1.90 0.89 1.64 0.48 2.87 0.78 2.17 6.52 4.10 30.73 9 5.40 1.51 4.16 3.36 3.61 0.18 0.06 1.16 1.75 5.54 8.96 2.75 38.44 10 6.17 3.52 3.76 3.49 2.83 2.49 0.31 0.64 4.80 5.24 5.05 8.69 46.99 11 4.99 3.05 6.29 4.47 3.20 1.42 0.70 0.13 1.29 3.45 5.16 2.24 36.39 12 6.83 3.63 7.20 2.68 2.05 2.96 1.04 0.00 0.03 6.71 8.28 6.85 48.26 13 4.16 1.58 2.74 5.89 2.38 1.30 0.00 1.35 6.17 1.54 3.79 1.66 32.56 14 3.70 6.11 9.44 4.18 3.15 0.73 0.77 1.81 2.23 6.75 4.84 4.79 48.50 15 3.66 5.27 4.47 2.03 0.58 0.23 0.09 3.28 0.83 4.81 M7.95 33.20 Product generated by ACIS - NOAA Regional Climate Centers. http://agacis.rcc-acis.org/53033/wets/results[11/23/2015 7:51:06 AM] ATTACHMENT 3 Data Forms WETLAND DETERMINATION DATA FORM — Western Mountains, Valleys, and Coast Region Project/Site: S 344th Street Vicinity between 911& SR 99 City/County: Federal Way. King County Sampling Date:11/20/15 Applicant/Owner: City of Federal Way State: WA Sampling Point: SPA Investigator(s): Steve Quarterman and Jamie Sloan Section, Township, Range: S20 T21 N. R04E Landform (hillslope, terrace, etc.): Depression Local relief (concave, convex, none): Concave Slope (%): —1 Subregion (LRR): A Lat: Long: Datum: Soil Map Unit Name: Norma sandy loam NWI classification: Upland Are climatic / hydrologic conditions on the site typical for this time of year? Yes ❑ No ® (If no, explain in Remarks.) Are Vegetation N, Soil Y, or Hydrology N significantly disturbed? Are "Normal Circumstances" present? Yes ® No ❑ Are Vegetation N, Soil N, or Hydrology N naturally problematic? (If needed, explain any answers in Remarks.) SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes ❑ No ® Is the Sampled Area Hydric Soil Present? Yes ❑ No M within a Wetland? Yes ❑ No Wetland Hydrology Present? Yes ❑ No Remarks: Sampling point was located in a low area on the property. Precipitation levels for the 3-month period prior to the field investigation are higher (wetter) than normal. VEGETATION — Use scientific names of plants. Dominance Test worksheet: Absolute Dominant Indicator Tree Stratum (Plot size: 30) % Cover Species? Status Number of Dominant Species 1 That Are OBL, FACW, or FAC: 0 (A) 2• Total Number of Dominant 3, Species Across All Strata: 1 (B) 4. Percent of Dominant Species 0 = Total Cover That Are OBL, FACW, or FAC: 0 (A/B) SaylinolShrub Stratum_ (Plot size: 0 1. Rubus armeniacus 100 Yes FACU Prevalence Index worksheet: 2 Total % Cover of: Multiol b 3 _ OBL species x 1 = 4 FACW species x 2 = 5 FAC species x 3 = 100 = Total Cover FACU species x 4 = Herb Stratum (Plot size: 0 UPL species x 5 = 1. Column Totals: (A) (B) 2. _ 3 _ _ Prevalence Index = B/A = Hydrophytic Vegetation Indicators: 4 5 ❑ Rapid Test for Hydrophytic Vegetation ti ❑ Dominance Test is >50% ❑ Prevalence Index is :53.0' 7. ❑ Morphological Adaptations' (Provide supporting 8 data in Remarks or on a separate sheet) 9. ❑ Wetland Non -Vascular Plants' 10. ❑ Problematic Hydrophytic Vegetation' (Explain) 11. 'Indicators of hydric soil and wetland hydrology must 0 = Total Cover be present, unless disturbed or problematic. Woody Vine Stratum (Plot size: 30)- 1. Hydrophytic 2. Vegetation 0 = Total Cover Present? Yes ❑ No % Bare Ground in Herb Stratum 100 Remarks: Pseudotzuga menziesii, Arbutus menziesh, Thuja plicata, and Populus trichocarpa are in the vicinity of the sampling point. US Army Corps of Engineers Western Mountains, Valleys, and Coast —Version 2.0 SOIL Sampling Point: SPA Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color (moist) % Color moist % Type' Loc? Texture Remarks 0-9 10YR 3/3 100 9+ Gravel refusal Loam 'Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) ❑ Histosol (Al) ❑ Sandy Redox (S5) ❑ Histic Epipedon (A2) ❑ Stripped Matrix (S6) ❑ Black Histic (A3) ❑ Loamy Mucky Mineral (F1) (except MLRA 1) ❑ Hydrogen Sulfide (A4) ❑ Loamy Gleyed Matrix (F2) ❑ Depleted Below Dark Surface (A11) ❑ Depleted Matrix (F3) ❑ Thick Dark Surface (Al2) ❑ Redox Dark Surface (F6) ❑ Sandy Mucky Mineral (S1) ❑ Depleted Dark Surface (F7) ❑ Sandy Gleyed Matrix (S4) ❑ Redox Depressions (F8) Restrictive Layer (if present): Type: Depth (inches): is refusal. Soils appear to be disturbed (gravel fill). HYDROLOGY Wetland Hydrology Indicators: Primary Indicators (minimum of one required; check all that a ❑ Surface Water (Al) ❑ High Water Table (A2) ❑ Saturation (A3) ❑ Water Marks (B1) ❑ Sediment Deposits (132) ❑ Drift Deposits (63) ❑ Algal Mat or Crust (134) ❑ Iron Deposits (65) ❑ Surface Soil Cracks (136) ❑ Inundation Visible on Aerial Imagery (137) ❑ Sparsely Vegetated Concave Surface (138) Field Observations: Surface Water Present? Yes ❑ No Water Table Present? Yes ❑ No 2Location: PL=Pore Linino. M=Matrix. Indicators for Problematic Hydric Soils': ❑ 2 cm Muck (A10) ❑ Red Parent Material (TF2) ❑ Very Shallow Dark Surface (TF12) ❑ Other (Explain in Remarks) 3Indicators of hydrophytic vegetation and wetland hydrology must be present, unless disturbed or problematic. Hydric Soil Present? Yes ❑ No ❑ Water -Stained Leaves (139) (except MLRA 1, 2, 4A, and 4B) ❑ Salt Crust (1311) ❑ Aquatic Invertebrates (813) ❑ Hydrogen Sulfide Odor (Cl) ❑ Oxidized Rhizospheres along Living Roots (C3) ❑ Presence of Reduced Iron (C4) ❑ Recent Iron Reduction in Tilled Soils (C6) ❑ Stunted or Stressed Plants (D1) (LRR A) ❑ Other (Explain in Remarks) Depth (inches): Depth (inches): Secondary Indicators (2 or more reouired) ❑ Water -Stained Leaves (139) (MLRA 1, 2, 4A, and 413) ❑ Drainage Patterns (1310) ❑ Dry -Season Water Table (C2) ❑ Saturation Visible on Aerial Imagery (C9) ❑ Geomorphic Position (D2) ❑ Shallow Aquitard (D3) ❑ FAC-Neutral Test (D5) ❑ Raised Ant Mounds (D6) (LRR A) ❑ Frost -Heave Hummocks (D7) Saturation Present? Yes ❑ No ® Depth (inches): Wetland Hydrology Present? Yes ❑ No Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous Remarks: US Army Corps of Engineers Western Mountains, Valleys, and Coast —Version 2.0 ATTACHMENT 4 Selected Site Photographs 1. SP-1 facing south. 2. Waterway A looking east at stream along western site boundary. Wetland Delineation Figure Kin Count Parcel Nos. LANDAU g y Selected Site Photographs ASSOCIATES 2021049099 and 2021049121 4.1 Federal Way, Washington 3. Waterway A looking north at stream near northeast site boundary. 4. Farthest downstream elevation drop, boulder weir, near 1111 Avenue South. Wetland Delineation Figure LANDAU King county Parcel Nos. Selected Site Photographs 14ASSOCIATES 2021049099 and 2021049121 4-2 Federal Way, Washington 5. Log weir elevation drop upstream of boulder weir Wetland Delineation Figure Kin Count Parcel Nos. 14 LANDAU 2021049099 and 2021049121 Selected Site Photographs 4 _� ASSOCIATES Federal Way, Washington