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SEDCAD 4 for Windows <br />('- ... inhf 10°R -7nn7 P-1. I Q,K- ah <br />9 <br />w/o Freeboard w/ Freeboard <br />• Hydraulic Radius: 0.293 ft <br />Froude Number: 0.92 <br />Structure #1 (Pond <br />NSSA Pond <br />Pond Inputs: <br />Initial Pool Elev: 6,075.40 ft <br />Initial Pool: 0.17 ac-ft <br />*Sediment Storage: 0.01 ac-ft <br />Dead Space: 20.00% <br />*Sediment capacity based on Average Annual R of 20.0 for 2 year(s) <br />Straight Pipe <br />Barrel Barrel Entrance Tailwater <br />Barrel Manning's Spillway <br />Diameter Length Loss Depth <br />Slope (%) n Elev (ft) <br />(in) (ft) Coefficient (ft) <br />6.00 35.00 10.00 0.0110 6,075.40 0.50 0.00 <br />• Emergency Spillwa <br />Spillway Elev Crest Length Left Right Bottom <br />(ft) Sideslope Sideslope Width (ft) <br />6,076.70 15.00 2.50:1 2.50:1 5.00 <br />Pond Results: <br />Peak Elevation: 6,075.91 ft <br />H'graph Detention Time: 2.20 hrs <br />Pond Model: CSTRS <br />Dewater Time: 0.78 days <br />Trap Efficiency: 78.30 <br />Dewatering time is calculated from peak stage to lowest spillway <br />Elevation-Capacity-Discharge Table <br />1d <br />Area Capacity Discharge Dewater <br />Elevation Time <br />(ac) (ac-ft) (cfs) (hrs) <br />6,073.55 0.031 0.000 0.000 Top of Sed. Storage <br />6,074.00 0.090 0.026 0.000 <br />Filename: NSSA.sc4 Printed 10-16-2008