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SEDCAD 4 for Windows <br />(`nnvrinh4 ioOA _9111 11 Pomch 1 z,h,-K <br />0 <br />Pond Inputs: <br />Initial Pool Elev: <br />5,680.75 ft <br />Initial Pool: <br />3.69 ac -ft <br />*Sediment Storage: <br />1.73 ac -ft <br />Dead Space: <br />0.00% <br />*Sediment capacity based on A verage Annual R of 27.0 for 3 year(s) <br />Emergency Spillway <br />Spillway Elev Crest Length Left Right Bottom <br />(ft) Sideslope Sideslope Width (ft) <br />5,686.00 10.00 2,00:1 2.00:1 10.00 <br />Perforated Riser <br />Riser <br />Riser Height <br />Diameter (in) <br />Barrel <br />Barrel Length Barrel Slope <br />Diameter (in) <br />Number of <br />Spillway Elev <br />Holes per <br />Mannings n <br />(ft) <br />(ft) (oho) <br />(ft) <br />Elev <br />18.00 6.00 <br />18.00 10.00 1.00 <br />0.0140 5,684.00 2 <br />Pond Results: <br />Peak Elevation: <br />5,682.03 ft <br />H'graph Detention Time: <br />11.03 hrs <br />Pond Model: <br />CSTRS <br />Dewater Time: <br />1.17 days <br />Trap Efficiency: <br />86.16 % <br />Dewatering time is calculated from peak stage to lowest spillway <br />Elevation -Capacity -Discharge Table <br />Elevation <br />Area <br />(ac) <br />Capacity <br />(ac -ft) <br />Discharge <br />(cfs) <br />Dewater <br />Time <br />(hrs) <br />5,678.72 <br />1.698 <br />0.000 <br />0.000 <br />Top of Sed. Storage <br />5,678.75 <br />1.702 <br />0.056 <br />0.000 <br />5,679.00 <br />1.731 <br />0.485 <br />0.000 <br />5,679.25 <br />1.760 <br />0.922 <br />0.000 <br />5,679.50 <br />1.789 <br />1.365 <br />0.000 <br />5,679.75 <br />1.818 <br />1.816 <br />0.000 <br />5,680.00 <br />1.847 <br />2.274 <br />0.000 <br />5,680.25 <br />1.877 <br />2.740 <br />0.000 <br />5,680.50 <br />1.906 <br />3.213 <br />0.000 <br />5,680.75 <br />1.936 <br />3.693 <br />0.000 <br />Low hole SPW #2 <br />5,681.00 <br />1.966 <br />4.181 <br />0.945 <br />6.24* <br />5,681.25 <br />1.996 <br />4.676 <br />1.337 <br />5.30 <br />Filename: Pond NHN-002 DESIGN 10YR EVENT_05.10.18.sc4 Printed 05-10-2018 <br />Appendix 2.05.3(4)-9 Page 12 March 2018 (TR -16) <br />