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Conveyance Calculation WSU NPSE Gravel Parking Lots - Big J's Site 7/8/2015 Calculation By: Eric Peterson Reference: City of Everett Stormwater Manual <br />� � 25 YR <br />Location Discharge Pipe Design <br />uno ain a ipe °W ipe <br />From To Drainage Drainage Coefficient Tc to Intensity Add'I Totai Flow Diameter Pipe Slope Velocity Capacity Percent <br />Drain ID Structure Structure Source Area (A) (C) C*A F C*A Structure in/hr Runoff cfs Inflow cfs cfs (in) (%) ft/s cfs Capacity Check Comments <br />SD1 CB2 C61 Site 0.17 0.80 0.136 0.14 5 3.069 0.42 0 0.42 8 2.0% 7.09 2.69 16% OK <br />SD2 C61 Pond Site 0.09 0.80 0.072 0.21 5 3.069 0.64 0 0.64 8 3.5% 9.39 3.56 18% OK <br />SD3 C63 Pond Site 0.23 0.68 0.156 0.36 5 3.069 1.12 0 1.12 8 3.5% 9.39 3.56 31% OK <br />SD4 CB FC Sewer Pond - SEE MGSFLOOD REPORT 0 0 0.06 12 11.0% 18.36 0% OK 25-year under detention <br />