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HomeMy WebLinkAboutPN_Renton_DUIP_Project_Narrative_20201231 19-2612 Downtown Utility Improvement Project November 2019 City of Renton Project Narrative Date: November 2019 Project: Renton Downtown Utility Improvement Project (DUIP) To: City of Renton From: Murraysmith Project Description The City of Renton plans to rehabilitate and replace existing water, sewer, and stormwater utility systems as part of the Downtown Utility Improvement Project (DUIP). The existing system has reached or is nearing the end of its useful lifespan. Replacement, rehabilitation, and/or upsizing the individual utilities is planned in select locations within the project area based on age, capacity needs, condition, and/or maintenance requirements. The project will improve the reliability and capacity of each of the utility systems. Work is within the downtown area of Renton and is confined to the City right-of-way or utility easements. A Civil Construction Permit will be filed for the project. The project is in the City of Renton, WA, focused on the downtown business area, primarily on S 2nd Street and S 3rd Street and including several cross streets, as defined per the following:  S 2nd St, between Rainier Ave S and the Cedar River  SW Sunset Blvd, between Hardie Ave SW and Rainier Ave S  S 3rd St, between Hardie Ave SW and Williams Ave S  Lake Ave S, between S 2nd St and S Tobin St  Shattuck Ave S, between S 2nd St and S 4th Pl  Whitworth Ave S, between S 2nd St and S 3rd St  Morris Ave S, between S 2nd St and S 3rd St  Smithers Ave S, between S 3rd St and S 4th St  Burnett Ave S, between S 2nd St and S 3rd St  Mill Ave S, between Bronson Way S and S 3rd St  Sanitary sewer easements that connect to sewer mains in S 2nd St and S 3rd St S 2nd Street and S 3rd Street are major arterial roadways located within the City’s Center Downtown area and are lined by a variety of commercial businesses, Renton High School, and other mixed-use properties and contain several other utilities, both public and private. The area is zoned Urban Center and R6 Residential. Construction cost is estimated to be approximately 11 million dollars and will require the excavation and replacement of approximately 30,000 cubic yards of material. The road surface will be 19-2612 Page 2 of 3 Downtown Utility Improvement Project November 2019 City of Renton H:\File Sys\WWP - WasteWater\WWP-27-03949 Downtown Utility Improvements\Sepa - Permits\Flash Drive\PN_Renton_DUIP_Project_Narrative_20201231.docx restored to its current state following construction. There will be no change to land use, zoning, or access as a result of the project. The Downtown Utility Improvement Project is one of several projects that will be implemented in this approximate project area. The City has additional plans for improvements to transportation corridors, to be followed by streetscape improvements. A similar, but, separate project is also underway on Wells Ave S and Williams Ave S between S Grady Way and N 1st St. Sewer improvements are planned to improve capacity deficiencies in the existing system and replace pipes that have reached their useful lifespan and have begun to fail or are expected to do so within the near future. Existing 8” and 12” pipe in S 2nd St. will be replaced with similar size pipes between Rainier Ave S and Shattuck Ave S. On SW Sunset Way, existing 15” pipe will be replaced with 18” pipe. New 21” and 24” pipes will be constructed along a new alignment in S 3rd St between Rainier Ave S and Shattuck Ave S. Between S 2nd St and S 3rd St on Shattuck Ave S, Whitworth Ave S, and Morris Ave S, existing 8” pipes will be replaced with pipes of the same size. Existing pipes will be lined with Cast-in-Place Pipe (CIPP) in easements off of S 2nd St between Rainier Ave S and Shattuck Ave S, in Rainier Ave S just north of 3rd St S, in S 2nd St between Main Ave S and Mill Ave S, and in Mill Ave S between S 2nd St and Hauser Way S. Storm drain improvements are planned to address undersized pipes in the existing system by upsizing existing pipes to meet the current City storm drainage design guidelines (i.e. a minimum of 12” diameter) and to address identified deficiencies in pipe condition and material. The existing 12” pipe in S 2nd St will be replaced with pipes of the same size between Shattuck Ave S and Morris Ave S. On 3rd St, the existing 8” pipe will be upsized to 12” pipe between Rainier Ave S and Shattuck Ave S, and new pipe ranging from 12” to 18” will be installed from Shattuck Ave S to Smithers Ave S. The existing 12” pipe on Shattuck Av e S between S 2nd St and S 4th Pl will be replaced with pipe ranging in size from 12” to 36”. Between S 2nd St and S 3rd St on Whitworth Ave S and Morris Ave S, existing 6” pipe will be replaced with new 12” pipe, while on Mill Ave S new 12” pipe will be installed to replace the existing 8” pipe. Finally, in the intersection of Mill Ave S. and S 2nd St., approximately 50 feet of 12” pipe will be upsized to 30” pipe. Water improvements are planned to replace aging infrastructure and upsize undersized pipes. All proposed water pipes will be 12” and be designed to Renton and Department of Health DOH guidelines. Replacements of existing 8” water mains are proposed along S 2nd St between Lake Ave and Whitworth Ave. S. New 12” water main will be put in on S 2nd St between Lake Ave and Rainier Ave. Replacements of 8” water mains are also proposed along Shattuck Ave S between S 2nd St and S 3rd St. New water main will be placed from the intersection of S 2nd St and Whitworth Ave S from the intersection to approximately 250 ft south of the intersection where it will connect to an existing 12” main. Whitworth also has a proposed water main replacement in the intersection of Whitworth Ave S and S 3rd St to replace a 4” section of water main. Finally, there is proposed water main between Houser Way S and Bronson Way S to replace existing 6” and 8” water mains. A small portion of the project is within 200-ft of the Cedar River. Existing 8” water main will be replaced with new 12” water main in Mill Ave S at the intersection of Bronson Way S and Mill Ave S, near the Bronson Way S bridge over the Cedar River and approximately 30-ft from the ordinary high water mark. This work will be confined to the existing paved roadway, which is not within the FEMA 100-year floodway and will not result in any obstructed views. The Cedar River is contained in an engineered channel in this location with pedestrian walkways along both sides of the river. The replacement of the water main qualifies for a Shoreline Exemption per City of Renton Code 4-9-190.C. as detailed below: 19-2612 Page 3 of 3 Downtown Utility Improvement Project November 2019 City of Renton H:\File Sys\WWP - WasteWater\WWP-27-03949 Downtown Utility Improvements\Sepa - Permits\Flash Drive\PN_Renton_DUIP_Project_Narrative_20201231.docx 4-9-190.C. EXEMPTIONS FROM PERMIT SYSTEM: The following shall not be considered substantial developments for the purpose of this Master Program and are exempt from obtaining a Shoreline Substantial Development Permit (SSDP). An exemption from an SSDP is not an exemption from compliance with the Act or the Shoreline Master Program, or from any other regulatory requirements. 3. Maintenance and Repair: Normal maintenance or repair of existing structures or developments, including damage by accident, fire or elements. a. “Normal maintenance” includes those usual acts to prevent a decline, lapse, or cessation from a lawfully established condition. b. “Normal repair” means to restore a development to a state comparable to its original condition, including but not limited to its size, shape, configuration, location and external appearance, within a reasonable period after decay or partial destruction, except where repair causes substantial adverse effects to the shoreline resource or environment. c. Replacement of a structure or development may be authorized as repair where such replacement is the common method of repair for the type of structure or development and the replacement structure or development is comparable to the original structure or development including, but not limited to, its size, shape, configuration, location and external appearance and the replacement does not cause substantial adverse effects to shoreline resources or environment.