The URL can be used to link to this page

Home My WebLink AboutRS_Lew_Lake_Study_220422_v2 LAKE STUDY FOR NISENNA RESIDENCE CITY OF RENTON Wetland Resources, Inc. Project #21372 Prepared By Wetland Resources, Inc. 9505 19th Avenue SE, Suite 106 Everett, WA 98208 (425) 337-3174 Prepared For Sin Lew 3909 Lake Washington Blvd N Renton, WA 98056 Revision 1: April 25, 2022 ii TABLE OF CONTENTS 1.0 PROPOSED PROJECT ...................................................................................................................1 1.1 PROJECT LOCATION .......................................................................................................................... 1 1.2 LANDSCAPE SETTING ......................................................................................................................... 1 1.3 SITE DESCRIPTION ............................................................................................................................. 2 1.4 PROJECT DESCRIPTION ...................................................................................................................... 4 2.0 LAKE STUDY ...............................................................................................................................4 2.1 ASSESSMENT METHODOLOGY .......................................................................................................... 4 2.1.1 Field Investigation ....................................................................................................................... 4 2.1.2 Limit of Study .............................................................................................................................. 4 2.1.3 Lake Assessment Narrative .......................................................................................................... 4 2.1.4 Ecological Functions .................................................................................................................... 5 3.0 USE OF THIS REPORT ................................................................................................................8 4.0 REFERENCES ..............................................................................................................................9 LIST OF FIGURES - AERIAL VIEW OF THE SUBJECT PROPERTY (NOT TO SCALE). .........................................1 - LANDSCAPE-SCALE VICINITY MAP (GOOGLE MAPS) ....................................................2 - BING MAPS BIRD’S EYE VIEW ........................................................................................3 - EXISTING SITE CONDITONS. FACING SOUTHWEST TOWARDS LAKE WASHINGTON FROM THE RESIDENCE. ............................................................................................5 - EXISITNG SITE CONDITON. FACING NORTHEAST, TOWARDS THE RESDIENCE. ............6 LIST OF APPENDICES APPENDIX A: LAKE STUDY MAP Nisenna Residence 1 Lake Study WRI #21372 Revision 1: April 25, 2022 1.0 PROPOSED PROJECT 1.1 PROJECT LOCATION The project occurs on King County Tax Parcel 3342103895. This is a 0.87-acre parcel, located at 3101 Mountain View Avenue N in the City of Renton. Access to the property is from the east via Mountain View Avenue N. The Public Land Survey System Locator is Section 31, Township 24N, Range 5E, WM. - Aerial view of the subject property (Not to Scale). 1.2 LANDSCAPE SETTING Basin: Puget Sound Sub-Basin: Water Resource Inventory Area (WRIA) 8 – Cedar River/Renton River Watershed: Lake Washington Watershed Nisenna Residence 2 Lake Study WRI #21372 Revision 1: April 25, 2022 - Landscape-Scale Vicinity Map (Google Maps) The study area is located on the east shore of Lake Washington, the second-largest natural lake in Washington State with a total surface area of over 22,000 acres. The lake is approximately 20 miles in total length, with an average width of 1.5 miles (Kerwin, 2001). Lake Washington is highly developed along much of the approximately 50 miles of lake shoreline. 1.3 SITE DESCRIPTION The subject property is immediately surrounded to the north and south by residential development, to the east by Mountain View Avenue N and to the west by Lake Washington. An existing house, detached garage, driveway, and deck cover the majority of the property. Between Nisenna Residence 3 Lake Study WRI #21372 Revision 1: April 25, 2022 the house and the shoreline of the lake, the backyard consists of maintained lawn and a few ornamental shrubs. Existing development along the lake’s shoreline is limited to the existing bulkhead and rockery. The face of the bulkhead clearly defines the ordinary high water mark (OHWM) of Lake Washington. No vegetation is present waterward of the OHWM and no aquatic vegetation or lake-fringe wetlands were observed. Beach substrate consists of sorted sand and large cobble pieces on a moderate grade. This is consistent with a high-energy shoreline. No other habitat features were observed on or in the vicinity of the subject property. - Bing Maps Bird’s Eye View Nisenna Residence 4 Lake Study WRI #21372 Revision 1: April 25, 2022 1.4 PROJECT DESCRIPTION The applicant proposes to remodel the existing residence, construct a second story over the existing garage, and expand the back door deck. New impervious surfaces are proposed but do not exceed the allowed maximum of 50% (RMC 4-3-090D.7.a.11). The footprint of the existing residence will not be changed and will be no closer to the shoreline. The back door deck will expand south and no closer to the shoreline. The proposed addition area is between the existing residence and garage, which currently consists of a few ornamental shrubs. Given all components of the proposed project will be outside the shoreline buffer (50 feet) and the majority of work will be behind (landward) of the existing primary structure, no net loss of shoreline ecological function will occur. The City of Renton’s Shoreline Master Program (SMP) requires applicants proposing shoreline modifications on existing legal lots to provide a Stream or Lake Study that meets the requirements of RMC 4-8-120D.19. 2.0 LAKE STUDY 2.1 ASSESSMENT METHODOLOGY Field Investigation Senior Ecologist, Niels Pedersen, PWS, conducted a site investigation on January 6, 2022. Limit of Study The proposed project occurs on tax parcel (tax ID number 3342103895). Lack of legal access to adjacent parcels prevents Wetland Resources, Inc. (WRI) staff from performing detailed investigation in surrounding areas. Therefore, this investigation involved a site visit to the subject property and evaluation of existing on-line information, include the USFWS National Wetlands Inventory (NWI), USDA/NRCS Web Soil Survey, WDFW SalmonScape Interactive Map, WDFW Priority Habitat and Species (PHS) Interactive Map, and King County iMap. Lake Assessment Narrative Lake Washington, a Type S water, is the only aquatic critical area located on and near the subject property. The western portion of the property includes a concrete bulkhead, with a rockery above, along Lake Washington. The majority of vegetation in the western portion of the property consists of maintained lawn and ornamental shrubs. Additional ornamental plantings border the southern and eastern sides of the residence. A few significant trees are located along the southern property boundary. The remaining portions of the property consist of impervious surfaces which include the single-family residence, garage, concrete and gravel walkways, and access driveway. Nisenna Residence 5 Lake Study WRI #21372 Revision 1: April 25, 2022 - Existing site conditons. Facing southwest towards Lake Washington from the residence. Ecological Functions The rock bulkhead deflects wave energy, which can cause erosion that leads to deeper water along the shoreline. High-energy/deepwater shorelines do not provide refuge opportunities for migrating fish. Bulkheads also prevent the establishment of riparian vegetation, which provides cover and forage opportunities for juvenile salmon. The absence of overhanging vegetation limits the ecological value for migrating fish. The existing impervious surface also limits the establishment of native vegetation, reducing the overall ecological value of this shoreline. Due to the mostly high-energy shoreline, lack of riparian vegetation, and presence of impervious surface within the shoreline buffer, shoreline ecological functions are limited within the subject property. Nisenna Residence 6 Lake Study WRI #21372 Revision 1: April 25, 2022 - Exisitng site conditon. Facing northeast, towards the resdience. Fish and Wildlife No fish or wildlife species were directly observed at the time of investigation. The Washington Department of Fish and Wildlife (WDFW), Pacific States Marine Fisheries Commission (PSMFC), and the Washington Dept. of Natural Resources (WADNR) are the primary agencies that provide publicly available information used for making fish presence determinations consistent with the water typing rules set forth in WAC 222-16-030. The following information represents the findings from each source. WDFW SalmonScape Map Tool SalmonScape is an online GIS database that contains publicly available resource information for fish population studies and general species distribution (both documented and modeled presence). Within Lake Washington, the following species are depicted: • Fall Chinook (documented presence), • Coho (documented presence), • Winter Steelhead (documented presence), • Sockeye (documented presence), Nisenna Residence 7 Lake Study WRI #21372 Revision 1: April 25, 2022 • Bull Trout (documented rearing), • Kokanee (documented presence) PSMFC StreamNet Map Tool StreamNet is a fish distribution database maintained by the PSMFC as a regional clearinghouse for fish data. In the vicinity of the project area, fish presence is only depicted within Lake Washington. StreamNet states the presence of the following species: • Fall Chinook (migration only) • Coho (migration only) • Sockeye (migration only) • Winter Steelhead (migration only) • Bull Trout (migration only) WDNR Forest Practices Activity Mapping Tool (FPAMT) FPAMT is an online GIS database that aids the process of submitting a Forest Practices permit application. The tool is useful for the purposes of this study because WDNR models fish presence. FPAMT depicts Lake Washington as a fish-bearing shoreline of the state. No other features are noted in the vicinity of the project. WDFW Priority Habitat and Species (PHS) Maps No terrestrial priority habitats are listed on or near the site. Aquatic priority habitats for the above-listed species are noted on the PHS maps. Measures to Protect Trees No tree removal will occur as part of this development proposal. No Net Loss of Shoreline Ecological Function The existing development along the shoreline provides limited ecological value due to its developed and maintained condition. Given the location of the improvements outside the shoreline buffer, construction is not expected to cause any temporary or permanent impacts to the existing ecological function of the lake. Given the lack of shoreline function currently provided by the existing lot and ecologically isolated location of the improvement, no net loss of shoreline ecological function is expected. Nisenna Residence 8 Lake Study WRI #21372 Revision 1: April 25, 2022 3.0 USE OF THIS REPORT This Lake Study is supplied to Sin Lew as a means of determining the presence of critical habitat, as required by the City of Renton during the permitting process. This report is based largely on readily observable conditions and, to a lesser extent, on readily ascertainable conditions. No attempt has been made to determine hidden or concealed conditions. The laws applicable to salmonid habitat are subject to varying interpretations and may be changed at any time by the courts or legislative bodies. This report is intended to provide information deemed relevant in the applicant's attempt to comply with the laws now in effect. The work for this report has conformed to the standard of care employed by ecologists. No other representation or warranty is made concerning the work or this report and any implied representation or warranty is disclaimed. Wetland Resources, Inc. Alia Richardson Associate Ecologist & Wildlife Biologist Nisenna Residence 9 Lake Study WRI #21372 Revision 1: April 25, 2022 4.0 REFERENCES Anderson et al. 2016. Determining the Ordinary High Water Mark for Shoreline Management Act Compliance in Washington State. WA Department of Ecology. Publication #16-06-029. Kerwin, J. 2001. Salmon and Steelhead Habitat Limiting Factors Report for the Cedar – Renton Basin (Water Resource Inventory Area 8). Washington Conservation Commission. Olympia, WA. http://www.pugetsoundnearshore.org/supporting_documents/WRIA_8_LFR_FINAL.p df. Accessed January 2022. NOAA. 2022. National Weather Service Forecast Office, Seattle, Washington. http://www.weather.gov/climate/index.php?wfo=sew. Accessed January 2022. StreamNet. 2022. StreamNet Mapper. http://www.streamnet.org/mapping_apps.cfm. Accessed January 2022. U.S. Fish & Wildlife Service (USFWS). 2022. National Wetlands Inventory (NWI) Online Mapper. http://www.fws.gov/wetlands/Data/Mapper.html. Accessed January 2022. Washington State Department of Fish and Wildlife (WDFW).2022a. Priority Habitats and Species: PHS on the Web. http://wdfw.wa.gov/mapping/phs/. Accessed January 2022. WDFW. 2022b. SalmonScape Online Mapping Application. http://apps.wdfw.wa.gov/salmonscape/map.html. Accessed January 2022. APPENDIX A LAKE STUDY MAP LAKE STUDY MAP NISENNA RESIDENCE PORTION OF SECTION 31, TOWNSHIP 24N, RANGE 05E, W.M. Delineation / Mitigation / Restoration / Habitat Creation / Permit Assistance 9505 19th Avenue S.E. Suite 106 Everett,Washington 98208 Phone: (425) 337-3174 Fax: (425) 337-3045 Email: mailbox@wetlandresources.com Date: 4/25/2022 Nisenna Residence Revision 1 Lake Study Map Drawn by: AR Project # 21372 Sheet 1/1 Sin Lew 3909 Lake Washington Blvd Ln Renton, WA 98056 MOUNTAIN VIEW DR(SITE ACCESS)LEGEND Scale 1" = 20' 2010 30 400ORDINARY HIGH WATER MARK (OHWM) LAKE WASHINGTON TYPE S EXISTING BUILDINGS PROPOSED FOOTPRINT EXPANSION EXISTING CONCRETE EXISTING GRAVEL EX. SFR 1,470 SF EX. GARAGE 750 SF EX. GRAVEL DRIVEWAY EX. CONCRETE WALKWAY EX. GRAVEL WALKWAYEX. DECK (ABOVE CONCRETE) ADDITION 22 SF DECK 60 SF OHWM OF LAKE WASHINGTON 34' 6.5'15'15'3' 6.5'15'34'15'3'18'18'4' 4' 30' 30'25'25'12'5'SHORELINE BUFFER PARCEL #3342103895 PARCEL #3342103906PARCEL #3342103905PARCEL #3342103890 5 0' 18' EX. ROCKERY