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HomeMy WebLinkAboutPN_CUP_Narrative_Fire_Station_15_1South_170922_v1 Fire Station 15 Narrative September 2017 The City of Renton plans to construct a new neighborhood fire station at the southern portion of the property and a new water reservoir at the northern portion. These two project site development is coordinated and will share an access drive but they are separate projects and are designed by different design teams and constructed by different contractors. The projects will be executed in two phases. The initial phase will be the construction of the Fire Station excluding the finish grading and paving of the west access drive, the rear apron, and parking. The final grading and paving of these areas are included in the Reservoir project to allow this portion of the site to serve as lay-down and assembly areas for the reservoir. Note that the storm water systems for these areas will be constructed with in the initial phase. The Conditional Use Application documents are separated by project with general reference to the other project shown for coordination purposes. The information in the narrative below addresses the Fire Station 15 project and its interface with the reservoir project. A second separate narrative is provided for the reservoir project. Fire Station 15 project Narrative Fire Station 15: 7,497 GSF Address: 1404 North 30th Street, Renton, WA 98056 Permits Required for the project: 1. Conditional Use Permit 2. NPDES Permit 3. Civil Construction Permit 4. Utility Permits 5. Building Permit for the Station 6. Building Permit for the Storm Vault 7. Grading Permit 8. Land Use Permit 9. Mechanical Permit 10. Electrical Permit 11. Right of Way Use Permit 12. Permanent Sign Permit 13. Project Report and Construction Documents (Department of Health Approval) Zoning: The south portion is CN and the north portion is R6. Rezoning the site to CN has been requested at the northern portion of the site which is currently R-6. Special site features The site is currently unimproved; and slopes gently upwards from the southwest to northeast, varying in elevation from approximately 208 feet to 226 feet. There are no unusual features or geologic conditions. Statement soil type and drainage conditions The site is underlain by recessional outwash over weather till soils. The loose to medium dense recessional outwash will provide suitable bearing for the proposed structure. Elastic settlement is expected during construction due to new loads during construction. Site preparation including compaction of existing soils and compacted structural fill are recommended. Spread footing foundations are recommended. Groundwater may be encountered but liquefaction is not a concern. The site is considered Seismic Design Category D. The Station Phase proposes approximately 8,730 SF of pollution generating surfacing and will provide enhanced basic water quality treatment. Storm drainage work will include the following: 1. On-site detention system for new and replaced pavement areas, likely consisting of one underground detention facility with a flow control structure. 2. On-site drainage structures (catch basins, area drains, trench drains, etc.) and conveyance pipes. 3. On-site water quality facilities, including permeable pavement and a storm filter catch basin system. 4. On-site OSM facilities, including a bioretention pond west of the proposed building. Proposed use A neighborhood fire station which will be in use at all times. Access A new driveway will be provided at the west property line. This driveway will provide joint access for both the fire station and the water reservoir. A second driveway will be provided for fire truck exiting. The shared driveway leading to both public and private parking for the fire station will not be completed until the Reservoir project is completed as it will be used for construction access drive for the Reservoir project. Offsite improvements Offsite improvements consist or right-of-way development per City of Renton standards. Construction Contract Cost: $3.5 million dollars Quantities and type of fill/excavation All fill placed at the site will be structural fill. Native soils at the top of the site will be replaced with max. 8” lifts at 95% compaction. Number, type and size of trees Two existing trees will remain and require protection, the remaining 30 will be removed due to poor condition or conflicts with site development. Tree 24 is an unknown species thought to be a Mulberry. It is located on site and will be protected. Tree 32 is a Douglas Fir located offsite but protection is recommended due to proximity to grading work. Replacement trees will be planted in accordance with regulations. Explanation of land to be dedicated to city: N/A Job shack locations: The job shack for the Fire Station is proposed to be located near the street and construction entrance at the east edge of the property. The second will be located on the back half of the property, and accessed from a second construction entrance along the west edge of the property, this will be in place for approximately one year after occupancy of the station. Modifications requested: A zoning change has been requested for CN on the full site. This would replace the existing R-6 zoning at the northern portion of the site. Other changes not expected to require a modification include reduction in the landscape buffer at east edge is being requested to allow for a wider access drive at the middle of the property, A second driveway for apparatus, 36’ wide driveway for apron is requested. The Certificate of Occupancy for fire station is requested to be allowed prior to full site development. The Fire Station project proposes one ADA and one public parking stall on site in accordance with codes. Private parking for firefighters includes parking for 10 as determined by firefighters. As the access drive and rear portion of the site will be developed with the reservoir project, temporary on street ADA parking for one car is requested, general public and fire fighters will use on street neighborhood parking until completion of reservoir project. A temporary trash and recycling service location will need to be designated.