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SEDCAD 4 for Windows <br />r....,,.~..ti~ goon _onm o~..,vi., i c..ti,..~ti <br />9 <br /> w/o Freeboard w/ Freeboard <br />Design Discharge: 109.90 cfs <br />Depth: 2.70 ft <br />Top Width: 16.21 ft <br />Velocity: 5.02 fps <br />X-Section Area: 21.89 sq ft <br />Hydraulic Radius: 1.281 ft <br />Froude Number: 0.76 <br />Structure #3 (Pond, <br />Section Y 6 Pond <br />Pond Inputs: <br />Initial Pool Elev: 7,746.00 ft <br />Initial Pool: 1.22 ac-ft <br />*Sediment Storage: 0.00 ac-ft <br />Dead Space: 20.00 <br />*No sediment capacity defined <br />EmerQencv Snillwa <br />Spillway Elev Crest Length Left Right Bottom <br />(ft) Sideslope Sideslope Width (ft) <br />7,754.50 17.00 2.00:1 2.00:1 19.00 <br />Perforated Riser <br />Riser <br />Riser Height Barrel <br />Barrel Barrel Slope Number of <br />Spillway Elev <br />Diameter ft <br />() Diameter Len th ft <br />9 () (%) Mannin s n Holes er <br />p <br />g (ft) <br />(in) (in) Ele <br />12.00 9.20 12.00 121.00 8.00 0.0250 7,752.90 2 <br />Pond Results: <br />Peak Elevation: 7,755.23 ft <br />H'graph Detention Time: 8.28 hrs <br />Pond Model: CSTRS <br />Dewater Time: 1.74 days <br />Trap Efficiency: 64.95 <br />Dewatering time is calculated from peak stage to lowest spillway <br />Elevation-Capacity-Discharge Table <br />Filename: Secl6Mining2524R1.sc4 Printed 07-03-2008 <br />Exh. 7-140-25 Revision Date: 07/07/08 <br />Revision No.: TR-71 <br />