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•t <br /> Marlene Bissell 10-Unit Condo's <br /> Drainage Report <br /> Section 2 — Drainage Summary Table <br /> Drainage Basin Individual Basin Designation <br /> Information <br /> Development Area 0.83 Acres <br /> Type of Detention Proposed Detention Arch Pipe <br /> Approx.Detention Volume 3,706 CF <br /> Soil Types Alderwood Urban Land Complex <br /> Pre-developed Runoff Rates <br /> Q(cfs) 2-year 0.02 <br /> 10-year 0.09 <br /> 100-year 0.23 <br /> Post Development Runoff Rates Undetained/Detained <br /> Q(cfs) 2-year 0.21 /0.01 <br /> 10-year 0.33/0.07 <br /> 100-year 0.52/0.23 <br /> Offsite Upstream Area(acres) N/A <br /> Best Management Practices proposed: Cover Stock Piles <br /> Silt Fences <br /> Gravel Construction Entrance <br /> Hydroseeding/Mulching. <br /> Water quality measures proposed: 2 Double Cartridge Stormfilter CB's <br /> 3 <br />