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SEDCAD 4 for Windows <br /> rn.....;nht tacut_)ntn Pa,,,&a I crM.,.ti <br /> 6 <br /> Structure Detail: <br /> Structure #2 (Pond) <br /> Pond NHN-001 <br /> Pond Inputs: <br /> Initial Pool Elev: 5,671.50 ft <br /> Initial Pool: 1.30 ac-ft <br /> *Sediment Storage: 1.96 ac-ft <br /> Dead Space: 20.00% <br /> *Sediment capacity based on Average Annual R of 27.0 for 5 year(s) <br /> Drop Inlet <br /> Riser <br /> Diameter Riser Height DBarrel Barrel Barrel Sloes Mannings n Spillway Elev <br /> (in) (ft) (in) Length(ft) (%) (ft) <br /> 72.00 6.25 24.00 106.40 5.60 0.0240 5,676.50 <br /> Enhanced Perf. Riser <br /> Riser Barrel Number of <br /> Riser Height Barrel Barrel Slope Spillway Elev <br /> Diameter Diameter Mannings n Holes per <br /> (in) (ft) (in) Length(ft) (%) (ft) Elev <br /> 18.00 4.75 24.00 173.00 2.70 0.0240 5,675.50 2 <br /> Pond Results: <br /> Peak Elevation: 5,674.35 ft <br /> H'graph Detention Time: 9.37 hrs <br /> Pond Model: CSTRS <br /> Dewater Time: 2.03 days <br /> Trap Efficiency: 68.11% <br /> Dewatering time is calculated from peak stage to lowest spillway <br /> Elevation-Capacity-Discharge Table <br /> Area Capacity Discharge Dewater <br /> Elevation Time <br /> (ac) (ac-ft) (cfs) (hrs) <br /> 5,670.02 0.802 0.000 0.000 Top of Sed.Storage <br /> 5,670.25 0.824 0.188 0.000 <br /> 5,670.50 0.849 0.397 0.000 <br /> 5,670.75 0.874 0.612 0.000 <br /> Filename:Pond NHN-001 AS-BUILT 10YR EVENT_12.18.18.sc4 Printed 12-18-2018 <br /> Appendix 2.05.3(4)-6 Page 17 December 2018(TR-19) <br />