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SEDCAD 4 for Windows <br />r...,,..:..e~ w°a,m~na ee~.,me i c.e,..ve <br /> Combined <br /> <br />Elevation Broad- Total <br />{R) cres(~d <br />, eir Discharge <br /> s <br /> (cfs) <br />106.50 174.fi27 174.627 <br />107.00 244.049 244.049 <br />Structure #9 jPondl <br />West Taylor Sediment Pond <br />Pond Inputs: <br /> Initial Pool Elev: 7,468.00 ft <br /> Initial Pool: 1.76 ac-ft <br />Emergency Sp illway <br />Spillway Elev Crest Length LeR Right Bottom <br />(ft) Sideslope Sideslope Width (ft) <br />7,476.00 45.00 2.00:1 2.00:1 30.00 <br />Perforated Riser <br />Riser <br />Riser Height Barrel <br />Barrel Barrel Slope Number of i <br />Spillway Elev <br />' <br />Diameter (ft) Diameter Length (ft) (%} Manning <br />s n (R) Holes per i <br />(in) (In) Elev <br />18.00 12.00 18.00 140.OD 1.SD 0.0150 7,471.00 2 <br />Pond Results: <br />Peak Elevation: 7,479.89 ft <br />Dewater Time: 1.89 days <br />Dewatenng time is calculated from peak stage to lowest spil/way <br />Elevation-Caoacity-Discharge Table <br /> <br />Elevation Area <br /> <br />(ac) Capacity <br /> <br />(ac-R) Discharge <br /> <br />(cfs) Dewater i <br />Time <br />(hrs) <br />7,455.00 0.020 0.000 0.000 <br />7,455.50 0.025 0.011 0.000 <br />7,456.00 0.031 0.025 0.000 <br />7,456.50 0.036 0.042 0.000 <br />7,457.00 <br />7,457.50 0.043 <br />0.050 0.062 <br />0.085 0.000 <br />0.000 <br />7,456.00 0.057 0.112 D.ooo <br />7,458.50 0.065 0.142 0.000 <br />7,459.00 0.079 0.177 O.ODO <br />7,459.50 0.083 0.217 0.000 <br />16 <br />Filename: WT HaIfPMF 031607.sc4 Printed 03-16-2007 <br />Exh. 7-20G74 Revision Date: 3/19/07 <br />Revision No.: PR-02 <br />~• <br />~ I <br />r~ <br />L <br />