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HomeMy WebLinkAboutRS_Habitat_Data_Report_220307_v14125 Williams Avenue North Lake Study Prepared for Christina and Anup Kejriwal 4125 Williams Avenue North Renton, Washington 98056 Prepared by Northwest Environmental Consulting, LLC 3639 Palatine Avenue North Seattle, WA 98103 206-234-2520 November 2021 1 Project Purpose The project purpose is to install a boatlift at the existing shared pier and a double Jet-Ski lift along the bulkhead. Location The subject property is located at 4125 Williams Avenue North (King County parcel number 051850-0350) in the City of Renton, Washington (see Figure 1 – Vicinity Map). The parcel is on the waterfront of Lake Washington. Project Description The work will install a boat lift at an existing shared pier. A double Jet-Ski lift with a small grated catwalk will be installed along the existing bulkhead. During construction, a floating boom will surround the work barge, pier, and work area. Project drawings are included in Appendix A. Approach Northwest Environmental Consulting LLC (NWEC) biologist Courtney Straight conducted a site visit on June 25, 2021 to evaluate conditions on site and adjacent to the site. NWEC also consulted the following sources for information on potential critical fish and wildlife habitat along this shoreline: •City of Renton COR Maps online database (https://rp.rentonwa.gov/HTML5Public/Index.HTML?viewer=CORMaps) •Washington Department of Fish and Wildlife (WDFW): Priority Habitats and Species online database (http://apps.wdfw.wa.gov/phsontheweb/) •Washington State DNR Natural Heritage Features database (https://www.dnr.wa.gov/publications/amp_nh_trs.pdf?znn6z) •WDFW SalmonScape online database of fish distribution and ESA listing units (https://apps.wdfw.wa.gov/salmonscape/) Site Description The subject property is a shoreline tract in a residential neighborhood. It has shoreline on its west boundary with single-family homes to the north and south. Williams Avenue North is present to the east. 4125 Williams Avenue N Lake Study 4125 Williams Avenue N Lake Study 2 The only existing structure on the shoreline tract is the pier. The property has a shoreline consisting of a bulkhead, planted native vegetation, a concrete walkway, and a fully grated pier (Photos 1 through 5). The substrate of the lake is sand and cobble. Milfoil was observed starting five feet from the bulkhead and continuing waterward. The shoreline on the property has a concrete and sheet pile bulkhead with a grated pier (Photos 1 and 5). The property to the south has a concrete and sheet pile bulkhead (Photo 6) and the property to the north has a rock bulkhead behind a soft shoreline (Photo 7). The property contains a concrete walkway between shoreline native plantings including a Pacific willow, red osier dogwood, kinnikinnick, and Oregon grape. Approximately 500 feet south of the project area is the mouth of May Creek. Lake and Stream Classifications As a Shoreline of Statewide Significance (RMC 4-3-090B1) Lake Washington is defined as a Shoreline of the State (RMC 4-11-190S). The Shoreline is designated as “Shoreline Residential” and as a reach of Lake Washington (Figure 2 – Renton COR Map). May Creek is a salmon- bearing stream, classified as a Type S stream and included within the definition of a Shoreline of the State (RMC 4-3-090B1). Ordinary High Water Mark The Ordinary High Water Mark (OHWM) for Lake Washington is the line of mean high water (RMC 4-11-150 Definitions O). The Lake Washington water depth is controlled by the Army Corps of Engineers at the Hiram M. Chittenden Locks and is at 21.8 feet above sea level (Corps of Engineers Datum). The OHWM at the project site is shown in Appendix A. Vegetative Cover of the Site There are no wetlands or floodplains in the study area. The homeowner’s association for the housing development located along the shoreline, including the subject property, requires that residents plant only Washington State native plants in all outdoor landscaping and along the shoreline. There are no DNR Natural Heritage Features listed in the study area (Figure 3 – Natural Heritage Features). Ecological Functions of Lake Washington Along Study Area Existing native plantings in the study area provide habitat functions along the shoreline. Planting additional native plantings will further increase habitat conditions at the project site. These plants will provide overhanging cover for fish, structural diversity for birds and wildlife, detritus for aquatic invertebrates and long-term recruitment of woody material and other allochthonous food sources. 4125 Williams Avenue N Lake Study 3 Species Use Birds Birds observed near the site include raptors, herons, eagles, waterfowl, and songbirds. There is an osprey nest platform located approximately 500 feet south of the pier where bald eagles were observed perching during the site visit. Bald eagles, protected by the Bald and Golden Eagles Protection Act and the Migratory Bird Treaty Act, are protected as a “sensitive species” within the state of Washington (WAC 232-12-011). Eagles were observed in the area during the site study, but no nest or adequate nesting trees were visible along the shoreline. Mammals No wild mammals were observed during the site visit, but Lake Washington is known to have river otters, beavers, nutrias, and muskrats. Deer and coyotes are known to be present in the vicinity. Fish WDFW’s PHS mapping and SalmonScape mapping tools show the following salmonid species using Lake Washington for migration and/or rearing: residential coastal cutthroat (Oncorhynchus clarki), winter steelhead (O. mykiss), Dolly Varden/bull trout (Salvelinus malma), sockeye salmon (O. nerka), fall Chinook (O. tshawytscha), coho salmon (O. kisutch), and kokanee (O. nerka). The Salmonscape database maps the site as critical habitat to the Endangered Species Units (ESU) of Threatened Chinook and steelhead (Figure 4 – SalmonScape Map). Sockeye are known to spawn along the shoreline approximately 1,500 feet south of the project area. The nearest spawning stream is May Creek, located approximately 500 feet north of the project area, is modeled by Washington Department of Fish and Wildlife (WDFW) for spawning of non- listed coho and sockeye and listed Fall Chinook and winter steelhead trout. Juveniles may rear in the waters near the project when traveling from spawning sites on other lake tributaries to the lake’s outlet at the Locks. The project site is accessible to any fish migrating or rearing in the lake, and Lake Washington is designated as critical habitat for Endangered Fall Chinook salmon. There is a Freshwater Forested/Shrub Wetland approximately 1,500 feet north and May Creek is mapped approximately 500 feet south, but no other priority habitats are directly associated with the project site for aquatic or terrestrial species (Figure 5 – PHS Map). Measures to Protect Trees and Vegetation No trees or vegetation will be disturbed during the project as all work will occur in-water. Project Impacts and Conservation Measures Direct Impacts: Sediments: Sediment disturbance will occur below the OHWM and along the shoreline of Lake Washington. Additionally, the tug and barge propwash may disturb sediments temporarily when making trips to/from the site. Juvenile salmonids could be temporarily displaced or stressed by 4125 Williams Avenue N Lake Study 4 increased turbidity. A floating boom will be placed around the work area to contain floating debris to the project site. The project will meet state water quality standards. Shoreline: The shoreline is planted with native vegetation that will be preserved throughout the proposed work. Native vegetation maintains habitat functions by providing shade along the shoreline. These plants provide overhanging cover for fish, structural diversity for birds and wildlife, detritus for aquatic invertebrates and long-term recruitment of woody material and other allochthonous food sources. Lakebed: The lakebed coverage will be unchanged. Noise: Construction will create noise audible to neighbors and in-water. Noise disturbance will be short-term and should have negligible effects on fish and wildlife in the area. Potential spills: Short-term risks include the potential for petroleum spills that can occur with any equipment operation. The level of impact to the aquatic environment is expected to be minor because of the small amount of petroleum products available for spillage during typical construction activities, and because of spill containment measures that will be employed should a spill occur. Indirect Impacts: Recreational Boating: The project supports continued recreational boating, which has been identified as a limiting factor for salmonid populations in Lake Washington. The lift installation will not introduce additional boating to Lake Washington, as the owners could still access the lake from a public boat launch or private moorage facility. Other Conservation measures: Work window: The work will be completed during the prescribed in-water work window for this area of Lake Washington (July 16 to December 31). Operating within this time frame helps protect Chinook salmon, steelhead, bull trout and other salmonid fish species. Best Management Practices: Applicable BMPs will be used such as a floating boom around the in-water work area will contain any floating debris that may escape during construction. The barge will have a perimeter containment sock to absorb oil and grease that may wash from the barge during construction. Hazardous material containment materials such as spill absorbent pads and trained personnel will be required onsite during any phase of construction where machinery is in operation near surface waters. Mitigation The property owner is proposing to plant 10 snowberry plants along the shoreline to offset the minimal shading created by the boat lift and Jet-Ski lift. These plants will provide some overhanging vegetation along the shoreline and are intended to offset the overwater coverage. Conclusion Juvenile Chinook salmon, and other salmonids, rear and migrate along the Lake Washington shoreline. 4125 Williams Avenue N Lake Study 5 There will be temporary impacts from noise and disturbed sediments during installation of the lifts that will be minimized by using BMPs. Some long term effects are possible from minor shading caused. Planting 10 snowberry bushes along the shoreline will offset shading by providing allochthonous food materials and providing some overhanging vegetation and soft shadowing of the shoreline. The project will minimize construction effects on the environment by following the prescribed fish window and use applicable BMPs to prevent construction spills and debris from escaping the area. This project has been designed to meet current residential dock standards and will use Best Management Practices to reduce project impacts. The conservation measures are designed to improve ecological functions or prevent further degradation of habitat and will result in No Net Loss of ecological functions at the site. Document Preparers Courtney Straight Biologist 2 years of experience Northwest Environmental Consulting, LLC. (NWEC) Brad Thiele Biologist 27 years of experience NWEC (reviewer) NWEC followed standard acceptable field methods and protocols at the time work was performed. These standards include delineation of wetland and stream boundaries, characterization, rating, functional analyses, impact assessments and mitigation of impacts. The conclusions and findings in this report are based on field observations and measurements and represent our best professional judgment and to some extent rely on other professional service firms and available site information. Within the limitations of project scope, budget, and seasonal variations, we believe the information provided herein is accurate and true to the best of our knowledge. Northwest Environmental Consulting does not warrant any assumptions or conclusions not expressly made in this report or based on information or analyses other than what is included herein. 4125 Williams Avenue N Lake Study 6 REFERENCES City of Renton. 2021. COR Maps. Accessed July 2021 at https://maps.rentonwa.gov/Html5viewer/Index.html?viewer=CORMaps. City of Renton Municipal Code (RMC). 2021. RMC Section 4-8-120. Code Publishing. Accessed July 2021 at https://www.codepublishing.com/WA/Renton/#!/Renton04/Renton0408/Renton0408120. html Washington Department of Fish and Wildlife (WDFW). 2021. Priority Habitats and Species. Online database. Accessed July 2021 at http://apps.wdfw.wa.gov/phsontheweb/ WDFW. 2021. SalmonScape. Online database. Accessed July 2021 at http://apps.wdfw.wa.gov/salmonscape/ Washington State Department of Natural Resources. 2021. Sections that Contain Natural Heritage Features. Access July 2021 at https://www.dnr.wa.gov/publications/amp_nh_trs.pdf?znn6z 4125 Williams Avenue N Lake Study 7 Appendix A: Project Drawings PROJECT INFORMATION VICINITY MAP OWNER: CHRISTINA & ANUP KEJRIWAL SITE ADDRESS: 4125 WILLIAMS AVE N RENTON, WA 98056 BODY OF WATER: LAKE WASHINGTON PARCEL NUMBER: 0518500360, 3224059066 LEGAL DESCRIPTION: (0518500350) BARBEE MILL TGW UND INT IN TRS A,B,C,D,E,F,G, H,I,L,M,N,O & P LOT 36-A RENTON LLA# LUA-10-023-LLA REC# 20120802900003 SD LLA DAF- LOTS 35 & 36 SD PLAT, PLAT LOT 35-36 (3224059066) AREA IN FRONT OF GL 1-SEE MINOR #9034 DNR LEASE # 23-077640 17.17 AC PROJECT DESCRIPTION: INSTALL A NEW BOAT LIFT AND INSTALL A DOUBLE JET-SKI LIFT WITH CATWALK. PROJECT SITE: LAT: 47.52966° N LON: -122.20505° W NW 1/4 S:32 T:24N R:5E PAMELA MANDEL 4157 WILLIAMS AVE N BARBEE MILL COMMUNITY ORGANIZATION 4151 WILLIAMS AVE N CHRISTINA & ANUP KEJRIWAL 4125 WILLIAMS AVE N GARY & BRENDA BEEM 4119 WILLIAMS AVE N OHWM 21.85' @ BULKHEAD OHWM 21.85' @ SHORELINE EXISTING COMMUNITY DOCK TO REMAIN EXISTING ADJACENT DOCK TO REMAIN DEPT. OF NATURAL RESOURCES PARC. # 3224059066 45'S I T E P L A N SCALE 1" = 20'-0"WILLIAMS AVE. NN 89°04'39" W 159.48'N 01°06'32" E31.42'N 19°09'31" W 10.20' N 89°04'39" W 159.48' 134.33'N 02°17'14" W41.06'19.92'N 89°04'39" W 129.28' N 44°15'28" E 6.86' N 89°04'39" W 29.11'N 01°06'32" E 72.06'N 00°55'21" E 72.06'N 89°04'39" W 166.19' N 89°04'39" W 166.43'24.88'42' EASEMENT REC. NO. 20120802900003 DNR WITHDRAWL AREA PER DNR LEASE NO. 22-086046 EASEMENT REC. NO. 20180419000292 EXISTING BOAT LIFT TO REMAIN 128'+/- INSTALL NEW BOAT LIFT EASEMENT REC. NO. 20140327000856 10'-9"13'-5"EXISTING BOAT LIFT INSTALL DOUBLE JET-SKI LIFT WITH CATWALK 13'-11"12'-6"29'+/-S S S S S S SS S S PLANT 10 SNOWBERRY SHRUBS 22'+/-29'+/-18'+/-PLEASE NOTE THAT THE SHORELINE CONFIGURATION AND PROPERTY LINE LOCATIONS ARE APPROXIMATE ONLY. PROPERTY LINES ARE BASED ON AN AUGUST 2012 SURVEY BY CORE DESIGN. K E J R I W A L B O A T L I F T BASTA 8,000 LBS. BOAT LIFT - MODEL #8K53 NO SCALE A1.0 REVISIONS: DATE:11/15/2021 KEJRIWAL BOAT LIFT4125 WILLIAMS AVENUE NRENTON, WA 98056PROJECT INFO SITE PLAN LIFT DETAILS Architecture & Design 7413 Greenwood Ave N Seattle, WA 98103 BOAT LIFT ELEVATION SCALE 1/8"=1'-0" ~128' TO SHORE 14'~43' TO END OF PIER OHWM 21.85' EXISTING PIER (NO WORK) APPROX. LOCATION OF LAKE BED PROPOSED BOAT LIFT EXISTING FINGER PIER (NO WORK) 21.85' OHW JET-SKI LIFT ELEVATION SCALE 1/8" = 1'-0" 0'16'8' 12'-6"10'1'-6"APPROX. LOCATION OF LAKE BED PROPOSED DOUBLE JET-SKI LIFT W/ CATWALK EXISTING BULKHEAD BASTA 4,000 LBS. JET-SKI LIFT - MODEL #2X2K NO SCALE 4125 Williams Avenue N Lake Study 8 Appendix B: Figures Map data ©2021 2000 ft 4151 Williams Ave N 4,514 376 City of Renton This map is a user generated static output from an Internet mapping site and is for reference only. Data layers that appear on this map may or may not be accurate, current, or otherwise reliable. None 7/16/2021 Legend 2560 128 THIS MAP IS NOT TO BE USED FOR NAVIGATION Feet Notes 256 WGS_1984_Web_Mercator_Auxiliary_Sphere Information Technology - GIS RentonMapSupport@Rentonwa.gov City and County Labels Addresses Parcels City and County Boundary <all other values> Renton Environment Designations Natural Shoreline High Intensity Shoreline Isolated High Intensity Shoreline Residential Urban Conservancy Jurisdictions Streams (Classified) <all other values> Type S Shoreline Type F Fish Type Np Non-Fish Type Ns Non-Fish Seasonal Unclassified Not Visited Wetlands Streets Points of Interest Parks Waterbodies Sections that Contain Natural Heritage Features33 Data Current as of July 14, 2020 List of surveyed land sections in Washington identified by the Natural Heritage Program as reported to contain Natural Heritage Features. Contact the Washington Natural Heritage Program at natural_heritage_program@dnr.wa.gov for more detailed information on locations and occurrences. Town. Range Sec. Town. Range Sec. Town. Range Sec. Town. Range Sec. Washington Natural Heritage Program, P O Box 47016, Olympia, WA 98504-7016 T24N R04E S24 T24N R04W PB38 T24N R04W PB40 T24N R04W PB41 T24N R04W PB42 T24N R04W PB48 T24N R04W PB50 T24N R04W PB51 T24N R04W S18 T24N R04W S19 T24N R04W S20 T24N R04W S29 T24N R04W S30 T24N R04W S31 T24N R05W PB38 T24N R05W S13 T24N R05W S23 T24N R05W S24 T24N R05W S25 T24N R05W S26 T24N R05W S35 T24N R05W S36 T24N R06W S10 T24N R06W S11 T24N R06W S12 T24N R06W S13 T24N R06W S14 T24N R06W S15 T24N R06W S16 T24N R06W S17 T24N R06W S18 T24N R06W S19 T24N R06W S2 T24N R06W S20 T24N R06W S21 T24N R06W S22 T24N R06W S23 T24N R06W S24 T24N R06W S25 T24N R06W S26 T24N R06W S27 T24N R06W S28 T24N R06W S29 T24N R06W S3 T24N R06W S30 T24N R06W S31 T24N R06W S32 T24N R06W S33 T24N R06W S34 T24N R06W S35 T24N R06W S36 T24N R06W S4 T24N R06W S5 T24N R06W S6 T24N R06W S7 T24N R06W S8 T24N R06W S9 T24N R07W S12 T24N R07W S13 T24N R07W S24 T24N R07W S25 T24N R08E S1 T24N R08E S11 T24N R08E S13 T24N R08E S2 T24N R08E S24 T24N R08E S3 T24N R08E S35 T24N R08E S36 T24N R08E S4 T24N R08W PB38 T24N R09E S16 T24N R09E S17 T24N R09E S25 T24N R09E S27 T24N R09E S31 T24N R09E S32 T24N R09E S34 T24N R09E S35 T24N R09E S36 T24N R09E S8 T24N R09W S17 T24N R10E S21 T24N R10E S28 T24N R10E S29 T24N R10E S30 T24N R10E S31 T24N R10W PB44 T24N R10W PB49 T24N R10W PB50 T24N R10W PB51 T24N R10W PB52 T24N R10W S11 T24N R10W S14 T24N R10W S20 T24N R10W S23 T24N R10W S28 T24N R11E S14 T24N R11E S26 T24N R11E S32 T24N R11E S33 T24N R11W S10 T24N R11W S17 T24N R11W S18 T24N R11W S2 T24N R11W S3 T24N R11W S4 T24N R11W S5 T24N R11W S6 T24N R11W S7 T24N R12W S13 T24N R12W S32 T24N R12W S33 T24N R13W S10 T24N R13W S11 T24N R13W S14 T24N R13W S15 T24N R13W S16 T24N R13W S2 T24N R13W S22 T24N R13W S23 T24N R13W S26 T24N R13W S27 T24N R13W S3 T24N R13W S4 T24N R13W S9 T24N R16E S13 T24N R16E S21 T24N R16E S22 T24N R16E S26 T24N R16E S27 T24N R16E S33 T24N R17E S10 T24N R17E S19 T24N R17E S2 T24N R17E S20 T24N R17E S24 T24N R17E S27 T24N R17E S29 T24N R17E S3 T24N R17E S30 T24N R17E S33 T24N R17E S35 T24N R17E S4 T24N R17E S9 T24N R18E S16 T24N R18E S17 T24N R18E S18 T24N R18E S19 T24N R18E S20 T24N R18E S21 T24N R18E S25 T24N R18E S27 T24N R18E S7 T24N R18E S8 T24N R18E S9 T24N R19E S1 T24N R19E S10 T24N R19E S11 T24N R19E S2 T24N R19E S3 T24N R20E S10 T24N R20E S11 T24N R20E S14 Sources: Esri, HERE, Garmin, Intermap, increment P Corp., GEBCO, USGS, FAO, NPS, NRCAN, GeoBase, IGN, Kadaster NL, Ordnance Survey, Esri Japan, METI, Esri China (Hong Kong), (c) OpenStreetMap contributors, and the GIS User Community, WDFW All SalmonScape Species July 16, 2021 0 0.4 0.80.2 mi 0 0.65 1.30.33 km 1:36,112 Priority Habitats and Species on the Web Report Date: 07/16/2021 4125 Williams Avenue N Lake Study 9 Appendix C: Site Photographs Photo 1. View of pier from shoreline looking west. Photo 2. View of pier from northwest corner looking east. Photo 3. View of pier from northwest corner looking south. Photo 4. View of pier from southwest corner looking northeast. Photo 5. View of pier and bulkhead from pier looking east. Photo 6. View of adjacent property to the south.