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SEDCAD 4 for Windows <br />r-,A,M 1000 _9nn7 D-1. I CrVuueh <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 />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 />*Sediment capacity based on A verage Annual R of 20.0 for 2 year(s) <br />Emergency Spillwa?r <br />r 1 <br />U <br />Pond Results: <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 />Peak Elevation: 6,076.24 ft <br />Kgraph Detention Time: 2.10 hrs <br />Pond Model: CSTRS <br />Dewater Time: 0.81 days <br />Trap Efficiency: 70.05 <br />Dewatenng time is calculated from peak stage to lowest spillway <br />Elevation-Capacity-Discharge Table <br />• <br /> <br />Elevation Area <br /> <br />(ac) Capacity <br /> <br />(ac-ft) Discharge <br /> <br />(cfs) Dewater <br />Time <br />(hrs) <br />6,073.56 0.033 0.000 0.000 Top of Sed. Storage <br />6,074.00 0.090 0.026 0.000 <br />6,074.50 0.100 0.074 0.000 <br />6,075.00 0.110 0.126 0.000 <br />6,075.40 0.118 0.172 0.000 Spillway #1 <br />6,075.50 0.120 0.184 0.048 6.80 <br />6,076.00 0.130 0.246 0.470 10.90 <br />6,076.24 0.135 0.278 0.629 1.80 Peak Stage <br />6,076.50 0.140 0.314 0.804 <br />6,076.70 0.148 0.342 0.916 Spillway #2 <br />Filename: NSSA.sc4 Printed 10-21-2008