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HomeMy WebLinkAboutAttachments A-F1 Clark Close From:Karen Walter <KWalter@muckleshoot.nsn.us> Sent:Wednesday, October 05, 2016 11:10 AM To:Clark Close Cc:ROACH, VIVIAN (DNR); SHOEMAKER, MONICA (DNR); Joe.Burcar@ecy.wa.gov; rebekah.padgett@ecy.wa.gov; Reinbold, Stewart G (DFW); White, Kaitlyn R NWS Subject:RE: City of Renton(SEPA) Notice of Application - Southport Shoreline Modifications, LUA16-00614, ECF, SM Clark, Thank you again for sending us the requested materials for the Southport new piers and other shoreline modifications project referenced above. We have reviewed this information and offer the following initial questions and comments: 1. The Lake Study notes that the proposed new floats are "intended to provide public access opportunities for primarily non-motorized watercraft". How does the City of Renton intend to enforce this use and ensure that these floats do not become moorage facilities for motorized watercrafts? 2. Why is the easternward float as large as proposed? If it is to be used for non-motorized watercraft, it should be sized similarly to the westernward new float as shown on the plan sheets. 3. More information is needed about the pump out facility. We did not see where this new facility is proposed. The details of this facility and its location should be included in revised materials. 4. Has the applicant tested the surrounding sediments to see if creosote has spread beyond the proposed piling to be removed? 5. Is there a rough estimate available for the number of new pilings that will be needed to support the bulkhead? See Table 1 from the Lake Study. 6. Why is the applicant proposing to keep the existing timber pile stubs shown east to the new easternward float? These pilings should be removed to reduce salmon predator habitat and provide improved conditions for juvenile Chinook and other salmon. 7. The Lake Study notes that no lighting is proposed as part of the shoreline improvements; however, the BE notes that there may be lighting. Please clarify if the new floats will have artificial lighting. 8. Also, the Lake Study and BE notes the four, 5-story mixed-use apartment buildings, a new hotel comprised of two-12 story buildings, and 3 office buildings that are now or will be under constructed all of which should be expected to have outdoor artificial lighting. How are these adjacent buildings ensuring that their artificial lighting will avoid shining on Lake Washington in the project area thus reducing the salmon mitigation benefits from this project? 9. The City and the applicant should work with the WA DNR to see if the drifted logs resting against the bulkhead that are proposed for removal can be used at the two WA DNR mitigation/enhancement sites (i.e. South Lake Washington and Bird Island) adjacent to this project. 10. Please note that we are reviewing this project for both impacts to fish resources and tribal fishing activities. For potential impacts to Muckleshoot Tribal members fishing activities, please note that we will fully evaluate these impacts upon additional information received in response to these questions, as well, as during the Corps’ permitting process. We appreciate the opportunity to review this proposal and look forward to the City/applicants’ responses to these questions. Thank you, Karen Walter Watersheds and Land Use Team Leader BIOLOGICAL EVALUATION FOR FISH AND WILDLIFE SPECIES Southport Bulkhead Repair and Shoreline Float Project - Renton, WA Prepared for: U.S. Army Corps of Engineers, Seattle District Prepared on behalf of: Greg Krape, SECO Development, Inc. June 2016 THE WATERSHED COMPANY LAKE STUDY Southport Shoreline Modifications Prepared for: SECO Development Inc. Prepared on behalf of: Greg Krape, SECO Development, Inc. April 2017 THE WATERSHED COMPANY 250 4th Avenue South, Suite 200 Edmonds, WA 98020 ph. 425.778.8500 | f. 425.778.5536 www.cgengineering.com STRUCTURAL OBSERVATION REPORT Project: Seco Development Bulkhead Purpose: Structural Evaluation Location: 1083 Lake Washington Blvd N Renton, WA Date: April 1st 2016 CG Project: 16027.10 Report: 1 Client: Seco Development General Contractor: Unknown Field Rep: Dennis Titus, PE, SE, Stephen Tabert PURPOSE AND SCOPE A field representative of CG Engineering was on site on February 2, 2016 to evaluate the condition of an existing bulkhead located on the south side of Lake Washington. While on site we met with the Greg Krape from Seco Development. EXISTING BULKHEAD The existing bulkhead is constructed form a combination of timber and concrete. Refer to SS-1. The bulkhead is approximately 585ft long and spans two properties. It was originally constructed in the mid 1920’s when the site was originally developed for a previous power plant. The bulkhead retains a sidewalk. The north portion of the sidewalk was improved during a recent site development. A concrete sidewalk and pavers were constructed and a guard rail was added along this length of the bulkhead. The sidewalk to the south, which leads to the Boeing property, is relatively unimproved and consists of a gravel base with an asphalt sidewalk. A small pier is located at the center of the bulkhead which extends approximately 20ft into Lake Washington. The bulkhead continues behind the pier. The timber portion of the bulkhead consists of 8x12 timber sheet piles. A row of timber piles spaced approximately at 8ft on center and are located directly outboard of the sheet piles. The piles vary in size but are close to 12” diameter. A 10x10 timber waler runs along the outside of the piles and tiebacks were observed spaced at approximately 15’ on center. Along most of the bulkhead the waler was no longer present and the tiebacks were no longer attached. The top of the timber sheet piles and the round timber piles are located approximately 30” below the adjacent grade. A single row of ecology blocks are located upland of the sheet pile wall. The ecology blocks are 3x3x3ft with a 10” concrete cap on top. The area below the ecology blocks was probed and it appears that only one ecology block is present which bears on the soil directly behind the sheet pile wall. The ecology blocks appear to be part of the original construction or installed shortly after the timber portion of the bulkhead was constructed. The timber bulkhead appears to support the base of the existing concrete ecology blocks which supports the subgrade for the sidewalk. OBSERVATIONS At the time of the observation the lake water level was low in anticipation of upcoming rainfall, which left the tops of the piles visible. The piles, sheet piles and walers were observed during the site visit. Each was visually inspected for structural deficiencies. They were probed above and below the water level. They were also sounded for core rot. DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT Project Location Map ERC Report ENVIRONMENTAL REVIEW COMMITTEE REPORT ERC MEETING DATE: May 22, 2017 (first meeting); June 5, 2017 (second meeting); and October 16, 2017 (final meeting) Project Name: Southport Shoreline Modifications Project Number: LUA16-000614, ECF, SM Project Manager: Clark H. Close, Senior Planner Owner: SECO Development Inc., 1083 Lake Washington Blvd N. Suite 50, Renton, WA 98056 Applicant/Contact: Kenny Booth, The Watershed Company, 750 Sixth Street South, Kirkland, WA 98033 Project Location: 1053 and 1083 Lake Washington Blvd N (APNs 0523059075, 0523059076 and 0823059216), Renton, WA 98056 Project Summary: The applicant is requesting SEPA Environmental Review and a Shoreline Substantial Development Permit to repair a degraded bulkhead and install two (2) separate grated floats for small watercraft on the shore of Lake Washington, a Shoreline of Statewide Significance. Some of the shoreline activities include, but is not limited to, repair of the existing bulkhead between the 12-story Hyatt Regency Hotel at Southport and 5-story mixed-use apartment complex and Lake Washington, removal of a portion of the bulkhead to facilitate the construction of a shoreline cove, improvement of in-water ecological conditions, temporary moorage of motorized and non-motorized vessels by adding fully-grated floats, safety enhancements by removing all in-water components of the bulkhead, installation of “no wake” buoys, and expansion of recreational use of the shoreline. The existing shoreline bulkhead is approximately 580 feet in length and the project is expected to extend the functional life of the bulkhead for another 30-50 years. The proposed project site is located in the Urban Center (UC) zone, a high seismic area, Lake Washington Reach H, and the Aquatic Overlay District. The site is designated as Shoreline High Intensity by the Shoreline Master Program. No trees are proposed for removal. No existing or potential residential units would have views obstructed by the proposed project. Site Area: 580,888 SF Total Building Area GSF: 153,798 SF STAFF RECOMMENDATION: Staff Recommends that the Environmental Review Committee issue a Determination of Non-Significance - Mitigated (DNS-M).