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SOUNDVIEW TECHNOLOGY CENTER <br />EVERETT, WA <br />Name Vault 2 <br />Width 22 ft. <br />Length 264 ft. <br />Depth: 16 ft. <br />Discharge Structure <br />Riser Height: 15 ft. <br />Riser Diameter: 12 in. <br />Orifice 1 Diameter: 0.83 in. Elevation: 0 ft. <br />Orifice 2 Diameter: 1.37 in. Elevation: 11 ft. <br />Orifice 3 Diameter: 0.84 in. Elevation: 12.25 ft. <br />Stream Protection Duration <br />POC #1 <br />The Facility PASSED <br />The Facility PASSED. <br />As can be seen in the WWHM output, modeled vaults with dimensions of 22' x 264' x 15.0' (vault #2) <br />meets and exceeds the detention requirements for basin A. <br />BASIN B <br />Existing Basin <br />Name : TDA 3-3 <br />Bypass: No <br />GroundWater: No <br />Pervious Land Use <br />acre <br />C, Forest, Steep <br />9.5 <br />Pervious Total <br />9.5 <br />Impervious Land Use <br />acre <br />Impervious Total <br />0 <br />Basin Total <br />9.5 <br />Name : TDA 3-5 <br />Bypass: No <br />GroundWater: No <br />Pervious Land Use <br />acre <br />C, Forest, Steep <br />2.4 <br />Pervious Total <br />2.4 <br />Impervious Land Use <br />acre <br />Impervious Total <br />0 <br />Basin Total <br />2.4 <br />Developed Basin <br />Vault # <br />Name : Lower Surface <br />Bypass: No <br />GroundWater: No <br />Pervious Land Use <br />acre <br />C, Lawn, Steep <br />2.68 <br />Pervious Total <br />2.68 <br />Impervious Land Use <br />acre <br />ROADS MOD <br />6.41 <br />SIDEWALKS FLAT <br />0.46 <br />Impervious Total <br />6.87 <br />Basin Total <br />9.55 <br />MAY 23, 2017 <br />STORMWATER DRAINAGE REPORT <br />PAGE 21 <br />