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SOUNDVIEW TECHNOLOGY CENTER 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 B-3 <br /> Bypass: No <br /> Groundwater: No <br /> Pervious Land Use acre <br /> C, Forest, Steep 9.50 <br /> Pervious Total 9.50 <br /> Impervious Land Use acre <br /> Impervious Total 0 <br /> Basin Total 9.50 <br /> Name TDA B-5 <br /> Bypass: No <br /> Groundwater: No <br /> Pervious Land Use acre <br /> C, Forest, Steep 2.68 <br /> Pervious Total 2.68 <br /> Impervious Land Use acre <br /> Impervious Total 0 <br /> Basin Total 2.68 <br /> Developed Basin <br /> Vault#3 <br /> Name Lower Surface <br /> Bypass: No <br /> Groundwater: No <br /> Pervious Land Use acre <br /> C, Lawn, Steep 2.37 <br /> Pervious Total 2.37 <br /> Impervious Land Use acre <br /> ROADS MOD 6.66 <br /> SIDEWALKS FLAT 0.47 <br /> Impervious Total 7.13 <br /> Basin Total 9.50 <br /> SEPTEMBER 23, 2022 STORMWATER DRAINAGE REPORT PAGE 24 <br />