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Home My WebLink AboutSR_ERC_Lew_Dock_FINALDEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT Project Location Map SR_ERC_Lew Dock_FINAL ENVIRONMENTAL REVIEW COMMITTEE REPORT ERC Meeting Date: May 16, 2022 Project File Number: PR21-000432 Project Name: Lew Residence Dock Land Use File Number: LUA22-000126, ECF, SSDP Project Manager: Jill Ding, Senior Planner Owner: Sin Lew, 3101 Mountain View Ave N, Renton, WA 98056 Applicant/Contact: Madison Johnson, Seaborn Pile Driving, 1080 W Ewing St, Bldg B, Seattle, WA 98119 Project Location: 3101 Mountain View Ave N (Parcel No. 3342103895) Project Summary: The applicant is requesting a Shoreline Substantial Development Permit and Environmental (SEPA) Review for the installation of a new residential dock at 3101 Mountain View Ave N. The project site is located within the Residential-8 (R-8) zone. The proposal is to install 20 new 8" steel piles and construct a 613 sq ft dock covered by grated decking material. The proposal includes a 25-foot planted buffer along the Lake Washington Shoreline. The project site abuts Lake Washington, a Shoreline of the State, and is within reach E and the Shoreline Residential and Aquatic designations. The project site is mapped with a Moderate Landslide Hazard Area. Exist. Bldg. Area SF: N/A Proposed New Bldg. Area (footprint): Proposed New Bldg. Area (gross): 613 sq. ft. 613 sq. ft. Site Area: 37,742 sq. ft. (0.87 acres) Total Building Area GSF: STAFF RECOMMENDATION: Staff Recommends that the Environmental Review Committee issue a Determination of Non-Significance - Mitigated (DNS-M). DocuSign Envelope ID: 88C7ABCD-C852-4852-A47B-8152FCCAC4F4 City of Renton Department of Community & Economic Development Lew Residence Dock Staff Report to the Environmental Review Committee LUA22-000126, ECF, SSDP Report of May 16, 2022 Page 2 of 4 SR_ERC_Lew Dock_FINAL ENVIRONMENTAL REVIEW In compliance with RCW 43.21C.240, the following environmental (SEPA) review addresses only those project impacts that are not adequately addressed under existing development standards and environmental regulations. A. Environmental Threshold Recommendation Based on analysis of probable impacts from the proposal, staff recommends that the Responsible Officials: Issue a DNS-M with a 14-day appeal period B. Mitigation Measures 1. Project construction shall comply with the recommendations outlined in the submitted Lake Study/No Net Loss Determination including but not limited to planting trees and other vegetation along the shoreline and implementing the Best Management Practices during construction. 2. The applicant shall also submit the planting plan as-builts and annual monitoring reports required by the Army Corp of Engineers for five (5) to the City to ensure there is no net loss of ecological functions. 3. A surety device shall be required to ensure the mitigation performance standards are met. The surety device shall be sufficient to guarantee that structures, improvements, and mitigation required by permit condition perform satisfactorily for a minimum of five (5) years after they have been completed. C. Exhibits Exhibit 1: Environmental Review Committee (ERC) Report Exhibit 2: Plan Set Exhibit 3: Lake Study/No Net Loss Determination, prepared by Northwest Environmental Consulting, LLC, dated May 2022 Exhibit 4: Advisory Notes D. Environmental Impacts The Proposal was circulated and reviewed by various City Departments and Divisions to determine whether the applicant has adequately identified and addressed environmental impacts anticipated to occur in conjunction with the proposed development. Staff reviewers have identified that the proposal is likely to have the following probable impacts: 1. Earth Impacts: The upland portion of the project site is mapped within a moderate landslide hazard area. However, the installation of the proposed dock would occur primarily below the Ordinary High Water Mark (OHWM), within Lake Washington, which is outside of the mapped landslide hazard area, therefore a geotechnical report was not required to be submitted with the application materials. No mitigation is recommended as the proposed dock would be constructed outside of the mapped moderate landslide hazard area. Mitigation Measures: None recommended. Nexus: N/A 2. Water a. Lakes Impacts: The applicant submitted a Lake Study/No Net Loss Determination (Exhibit 3), prepared by Northwest Environmental Consulting, LLC, dated May 2022 with the project application materials. The project site abuts Lake Washington, a Shoreline of the State, and is within reach E and the Shoreline DocuSign Envelope ID: 88C7ABCD-C852-4852-A47B-8152FCCAC4F4 City of Renton Department of Community & Economic Development Lew Residence Dock Staff Report to the Environmental Review Committee LUA22-000126, ECF, SSDP Report of May 16, 2022 Page 3 of 4 SR_ERC_Lew Dock_FINAL Residential and Aquatic designations. Juvenile Chinook salmon, and other salmonids, rear and migrate along the Lake Washington shoreline. The proposed project would generate temporary construction impacts from noise and disturbed sediments during installation of the pilings to construct the proposed dock. Construction impacts would be minimized by complying with the prescribed in water work window and use of applicable Best Management Practices (BMPs) to prevent construction spills and debris from escaping the area. The long-term impacts of the proposed dock would be minimized by the use of grated decking, limiting the width of the dock to no wider than 4 feet, placement of the moorage in the deepest water possible, and minimizing the number of piles and limiting the pile diameter to 8”. To mitigate for adverse impacts that could result from the construction of the proposed dock, the applicant has submitted a planting plan would enhance the nearshore environment and increase the shoreline functions and values at the site. The submitted Lake Study/No Net Loss Determination (Exhibit 3) concludes that the proposed dock has been designed to meet current residential dock standards and would utilize BMPs to reduce project impacts. The combination of the utilization of BMPs during project construction as well as the proposed planting of native vegetation along the shoreline would improve ecological functions or prevent further degradation of habitat and will result in No Net Loss of ecological functions at the site. Staff recommends, as a SEPA Mitigation Measure that project construction comply with the recommendations outlined in the submitted Lake Study/No Net Loss Determination. Mitigation Measures: 1. Project construction shall comply with the recommendations outlined in the submitted Lake Study/No Net Loss Determination including but not limited to planting trees and other vegetation along the shoreline and implementing the Best Management Practices during construction. 2. The applicant shall also submit the planting plan as-builts and annual monitoring reports required by the Army Corp of Engineers for five (5) to the City to ensure there is no net loss of ecological functions. 3. A surety device shall be required to ensure the mitigation performance standards are met. The surety device shall be sufficient to guarantee that structures, improvements, and mitigation required by permit condition perform satisfactorily for a minimum of five (5) years after they have been completed. Nexus: SEPA Environmental Regulations and Aquatic Shoreline Overlay District pursuant to the City of Renton Shoreline Master Program 3. Vegetation Impacts: The submitted Lake Study/No Net Loss Determination (Exhibit 3), noted that the project site is currently vegetated with lawn area and variance ornamental landscape beds and trees. The project site currently lacks native plantings that would provide habitat functions along the shoreline. The proposed mitigation plantings proposed along the shoreline would increase habitat conditions at the project site. The mitigation planting plan proposes to plant three (3) western red cedars, two (2) shore pine, four (4) nootka rose, and three (3) mock orange along the shoreline of the project site to mitigate for impacts that could result from the construction of a new dock. These proposed plants would provide overhanging cover, structural diversity for birds and wildlife, detritus for aquatic invertebrates and long-term recruitment of woody material and other allochthonous food sources for aquatic invertebrates and fish species. As no vegetation is proposed to be removed from the project site and native plantings are proposed to be planted along the shoreline, no further mitigation is recommended. Mitigation Measures: None recommended Nexus: N/A DocuSign Envelope ID: 88C7ABCD-C852-4852-A47B-8152FCCAC4F4 City of Renton Department of Community & Economic Development Lew Residence Dock Staff Report to the Environmental Review Committee LUA22-000126, ECF, SSDP Report of May 16, 2022 Page 4 of 4 SR_ERC_Lew Dock_FINAL 4. Wildlife Impacts: The submitted Lake Study/No Net Loss Determination (Exhibit 3), noted that Lake Washington is known to provide habitat to river otters, beavers, nutrias, and muskrats. In addition, deer and coyotes have been observed within the vicinity of the project site. Washington Department of Fish and Wildlife’s (WDFW) Priority Habitat and Species (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 project site as critical habitat to the Endangered Species Units (ESU) of Threatened Chinook and steelhead. Sockeye spawning is mapped as occurring along the shoreline at or adjacent south of the site and within a few hundred feet to the north of the project site. May Creek (a Type F stream) is located approximately 3,000 feet north of the project site. May Creek is modeled by 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 site 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. As previously discussed above, the proposed dock has been designed to meet current residential dock standards and would utilize BMPs to reduce project impacts. The combination of the utilization of BMPs during project construction as well as the proposed planting of native vegetation along the shoreline would improve ecological functions or prevent further degradation of habitat and would result in No Net Loss of ecological functions at the site, therefore no further mitigation is recommended. Mitigation Measures: None recommended Nexus: N/A E. Comments of Reviewing Departments The proposal has been circulated to City Department and Division Reviewers. Where applicable, their comments have been incorporated into the text of this report and/or “Advisory Notes to Applicant.” ✓ Copies of all Review Comments are contained in the Official File and may be attached to this report. The Environmental Determination decision will become final if the decision is not appealed within the 14-day appeal period (RCW 43.21.C.075(3); WAC 197-11-680). Environmental Determination Appeal Process: Appeals of the environmental determination must be filed in writing on or before 5:00 p.m. on May 30, 2022. Due to the ongoing state of emergency enacted by Governor’s Proclamation 20-28.14 (and as amended), the City Clerk’s Office is working remotely. For that reason, appeals must be submitted electronically to the City Clerk at cityclerk@rentonwa.gov or delivered to City Hall 1st floor Lobby Hub Monday through Friday. The appeal fee, normally due at the time an appeal is submitted, will be collected at a future date if your appeal is submitted electronically. Appeals to the Hearing Examiner are governed by RMC 4-8-110 and additional information regarding the appeal process may be obtained from the City Clerk’s Office, cityclerk@rentonwa.gov. DocuSign Envelope ID: 88C7ABCD-C852-4852-A47B-8152FCCAC4F4 CITY OF RENTON DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT STAFF REPORT TO THE ENVIRONMENTAL REVIEW COMMITTEE EXHIBITS Project Name: Lew Residence Dock Land Use File Number: LUA22-000126, ECF, SSDP Date of Meeting May 16, 2022 Staff Contact Jill Ding Senior Planner Project Contact/Applicant Madison Johnson Seaborn Pile Driving 1080 W Ewing St, Bldg B, Seattle, WA 98119 Project Location 3101 Mountain View Ave N (Parcel No. 3342103895) The following exhibits are included with the ERC Report: Exhibit 1: Environmental Review Committee (ERC) Report Exhibit 2: Plan Set Exhibit 3: Lake Study/No Net Loss Determination, prepared by Northwest Environmental Consulting, LLC, dated May 2022 Exhibit 4: Advisory Notes DocuSign Envelope ID: 88C7ABCD-C852-4852-A47B-8152FCCAC4F4