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HomeMy WebLinkAboutPN_Parking_Lot_Upgrades_at_Ryerson_211130_V2.pdf kimley-horn.com 1000 Second Avenue, Suite 3900, Seattle, WA 98104 206-607-2600 June 11, 2021 Revised November 18, 2021 City of Renton Planning Department 1055 S Grady Way Renton, WA, 98057 RE: Land Use Permit, Type II - Project Narrative This is a project narrative for Parcel 214600-0050 located at 600 SW 10th Street in the City of Renton, The current zoning is Medium Industrial (IM) and there is no change in zoning or use being requested by this proposal. The parcel area is approximately 10.01 acres and the project area with in the parcel is approximately 3.84 acres. A Pre-Application meeting was held on May 6, 2021 and the Meeting Summary along with email correspondence with the land use planner are included with this submission. This Narrative has been revised from the initial submittal to provide a discussion on the trips generated by the existing tenant and future tenant allowed by the current use. GENERAL DESCRIPTION The existing parcel includes a large warehouse with internal office space and a vehicular and truck parking lot. This facility has been historically used for storing and shipping products as a metal supplier for approximately 14 years. The project scope proposed by this Land Use submittal seeks to convert an un-improved laydown area and an asphalt drive aisle behind the building to a striped asphalt lot with landscaping. The project team has evaluated this lot to accommodate a maximum number of stalls while maintaining clearances from existing elements and minimizing site impacts to the back half of the lot. The property setbacks are indicated on the preliminary site plan. The existing user will have more useable space and laydown area behind the building. No bulk storage or storing of hazardous materials are being proposed. The existing building interior, including office space and warehouse, will remain as is. There is a set of railroad rails that service the east side of the building and are to remain in place. The existing utilities serving the building and site shall be protected and remain in place, including the existing fire hydrant that is connected to a water main running from Seneca Avenue to SW 10th Street. Likewise, the existing catch basins and storm drain piping along the west side of the building will continue to be used to convey the onsite stormwater. The existing telecommunication antenna and equipment that are enclosed within a security fence will also remain. There are no steep slopes, wetlands, or significant tree stands within the project boundary. The US Geological Survey classifies the soil beneath the parcel as Ur - Urban land. A detailed geotechnical analysis and soil classification is included with this submittal. Per the geotechnical analysis, infiltration rates are between 0.14 and 0.25 inches per hour. The topography of the project area generally slopes from northeast to southwest with approximately 5 feet of fall across the site. Page 2 kimley-horn.com 1000 Second Avenue, Suite 3900 Seattle WA 98104 206-607-2600 There are no off-site improvements being proposed by this project. Demolishing activities include removal of asphalt and minor clearing and grubbing. The project site is accessed from the three (3) existing driveways along SW 10th Avenue and circulate to the west side of the building. The existing north access to Seneca Avenue will remain gated and accessed as needed. There are no significant trees identified to be removed by this project. The existing trees along the western and northern property lines are expected to remain. PROPOSED PROJECT Onsite improvements include asphalt pavement, concrete curbing, landscaping, stormwater management BMPs, drainage structures, and striping. The design vehicle for the striping is a WB-40 truck and trailer. In addition, two site accessible facilities are being provided. These include a portion of the existing parking lot will be restriped to add 6 ADA stalls and a bike rack will installed to accommodate 8 bicycles. To facilitate 137 new parking stalls, the project proposes two (2) drive aisles on the north side of the building with four (4) rows of 90-degree stalls. Non-contiguous parking along the north side of the building allows for continued ingress to the existing bay doors. This layout also allows for continued use of the railroad rails along the east property line. The current use is not anticipated to change with the proposed parking lot expansion. The only change would be that materials and trucks would be stored on a paved surface, as opposed to a gravel surface. The traffic impacts of the building at 600 SW 10th Street are therefore not proposed to change with the proposed paving. It is possible that a future use could utilize the site and change the trip generation. However, the traffic impacts of any future potential use should be evaluated when an application, such as a tenant improvement, is applied for. A 10-foot landscape setback is included along the northern and western edges of the parking lot to meet or exceed the landscaping buffer requirement. Drive aisles are designed for fire lane accessibility and vehicular turning movements. Concrete curbing is proposed along the eastern edge to provide a barrier along the railroad rails. The existing steel bollards are to remain around the fire hydrant and at any entry to the bay doors. Striping and signage will be included to delineate emergency vehicle access, ADA parking, and to provide no-parking at the loading zones. This project will meet the Peak Flow Control standard. Stormwater Management Best Management Practices (BMPs) with emphasis on Low Impact Development principles and practices are to address water quality and runoff requirements. Due to the low infiltration capacity, this project proposes using an underground detention vault to meet Core Requirement #3 for flow control. An internal riser with and orifice and weir will slowly release the 2-, 10- and 100-year storm to meet predeveloped conditions. For water quality, this project proposes using a modular wetland to treat the 2 -year storm to meet Core Requirement #8. Due to the shallow elevations of the existing catch basins along the west side and depth of water storage in the proposed vault, any stormwater from the system will need Page 3 kimley-horn.com 1000 Second Avenue, Suite 3900 Seattle WA 98104 206-607-2600 to be pumped. Based on the existing slope of the project site, no import or export of earthwork is expected. The perimeter parking lot landscaping strip meets RMC 4-4-070 (H)(4) which requires a minimum width of 10 feet. The interior parking lot landscaping strip meets RMC 4-4-070 (H)(5) which requires a minimum width of 8 feet. These areas are proposed to be planted with a mixture of trees and shrubs. Tree species include Emerald Queen and Suncole while the shrub species include Crimson Pygmy and Blue Mist. The landscape area required is 4,795 square feet and the provided landscape area is 12,185 square feet. The existing landscaping along the frontage along SW 10th Street has been analyzed and is compliant with the latest code. This project is expected to remove 55,656 square feet of existing asphalt and install 146,183 square feet of new asphalt pavement. The proposed pavement section is 3” of HMA over 6” CSBC for light traffic and 4” HMA over 6” CSBC for heavy traffic. Based on discussions with the Cross-connection Specialist, Mick Holte, the existing single check valve assembly on the incoming fire main will need to be upgraded to a double check valve assembly. The existing domestic backflow assembly has been determined to be compliant. No other utility issues are identified. The estimated cost of construction at this stage of the process is $1,125,000. Please contact me at 206-705-9767or sky.mcclave@kimley-horn.com should you have any questions or need additional information to complete your review. Sincerely, Sky D. McClave Civil Engineer