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HomeMy WebLinkAboutPN_ProjectNarrative_BuffaloDesign_v1buffalodesign architecture | interiors August 3, 2017 Conditional Use Permit Application Project Narrative 1. Project Name and Location King County AFIS Laboratory Replacement Black River Building (existing King County office building) 900 Oakesdale Avenue SW Renton, WA 98057 2. Size Tenant Improvements inside existing building, first floor: 15,585 gross sf Building Addition, Vehicle Inspection Addition: 3,065 gross sf Total existing building area (3 stories): 74,915 gross sf 3. Land Use Permits required for proposed project Conditional Use Permit 4. Zoning Designation of Site and Adjacent Properties CO 5. Current Use of the Site and Existing Improvements Type B Occupancy Office Building 6. Special Site Features None. 7. Statement addressing Soil Type and Drainage Conditions Geotechnical boring data show that the subsurface conditions at the site include fill over native soils. The fill is about 5 to 6 feet in thickness and includes loose to medium dense, sand, silty sand and silt. The native soils below the fill include 15.5 feet of very soft and very loose, silt, clay and silty sand. We believe these soils represent the upper part of the alluvium indicated in the geologic map. The soils under this upper alluvium include medium dense to very dense sand and gravel. We believe these soils represent the lower alluvium. Both borings ended in this unit. Groundwater was encountered at a depth of 6 feet 8 inches at the time of drilling. Based on our experience with the subsurface conditions in the site vicinity, we believe that the depth of groundwater is affected by precipitation. We expect that the groundwater may fluctuate between about 6 to 10 feet below ground surface. The project Geotechnical Engineer has concluded that onsite infiltration is infeasible as site soils consist of fill materials in the upper 5 to 6 feet. King County AFIS Lab 900 Oakesdale Avenue SW Project Narrative 1520 fourth avenue suite 400 seattle wa 98101 | 206 467-6306 | buffalodesign.com | page 2 of 3 8. Proposed use of Property and Scope of Proposed Development: The King County Regional Automated Fingerprint Identification System (AFIS) Lab and the Sheriff’s Department Photography Lab will be relocated to the first floor of King County’s Black River Building in Renton Washington. This project will provide tenant space to securely and safely manage, examine and process evidence. The Lab does not employ or expel hazardous materials in significant quantities. In addition to lab space, tenant improvements will provide conference rooms and facilities for training lab examiners and law enforcement personnel. A break out area and break room Secure long term archival evidence storage is also accommodated. A single story, 3,065 square foot, addition to the Black River Building is planned to provide secure space for the Processing of vehicles and oversized evidence that cannot be processed in the principal lab. Currently the AFIS Lab does not have such a facility and must gather evidence by dispatching investigators to crime scenes. The Vehicle Processing Facility will significantly improve evidence security and staff efficiency. In summary, the AFIS Lab is King County agency tenant planning to occupy existing County tenant office space within a (B) occupancy office building and owned by the County, with a type B vehicle expansion facility that increases the building’s size by four percent. 9. Plat Information: Not Applicable. 10. Access: Primary existing site access is from Oakesdale Avenue SW via a 30 foot wide two lane apron. Oakesdale has a landscaped median strip at this location so no left turns are possible out of the site. Additional vehicle access is provided by connections between parking areas serving adjacent office buildings . No modifications to site access are required or proposed for this project. 11. Proposed Off-Site Improvements: None proposed. 12. Total Estimate Construction Cost: $6,000,000. 13. Estimated Quantities and Type of Materials Involved if any fill or excavation is proposed: Approximately 250 cubic yards of excavation is required for the Vehicle Processing Facility construction (building addition). Approximately 125 cubic yards of structural fill will be added under the floor slab. 14. Number, Type and Size of any Trees to be Removed: The site has 39 trees over 6 inch diameter and alder or cottonwood trees at least 8 inch diameter. 33 trees will be retained. Priority One landmark trees: All will be preserved. Priority Two healthy tree groupings: All will be preserved. Priority Three: Four 8-11 inch diameter Betula Papyrifera (Paper Birch) will be removed. One 10 inch diameter Catalpa Bignonioides (Catalpa) will be removed. A tree retention worksheet is included in the Land Use Application. King County AFIS Lab 900 Oakesdale Avenue SW Project Narrative 1520 fourth avenue suite 400 seattle wa 98101 | 206 467-6306 | buffalodesign.com | page 3 of 3 15. Land to be dedicated to the City: None proposed. 16. Proposed Job Shacks, Sales Trailers, Model Homes: The General Contractor may have a construction trailer on site, or may occupy the existing building during construction. If a trailer is installed it will not be visible from Oakesdale Street. 17. Any Proposed Modifications being Requested: None. 18. Projects Located Within 100 feet of a Stream or Wetland: Not Applicable. 19. Projects Located Within 200 feet of the Black River, Cedar River, Springbrook Creek, May Creek, Lake Washington: Not Applicable.