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• <br />SEDCAD 4 for Windows <br />Material: Bare rock <br />Left Right <br />Freeboard Freeboard Freeboard <br />Sideslope Sideslope Slope ( %) Manning's n <br />Mult. x <br />Ratio Ratio <br />Depth (ft) % of Depth (VxD) <br />1.0:1 1.0:1 17.0 0.0350 <br />5.30 ft <br />Nonerodible Channel Results: <br />Structure #2 (Pond <br />Sec 28 Sed Pond <br />Pond Inputs: <br />Initial Pool Elev: 7,064.50 ft <br />Initial Pool: 1.67 ac -ft <br />Perforated Riser <br />Riser <br />Riser Height <br />w/o Freeboard w/ Freeboard <br />Design Discharge: <br />118.28 cfs <br />Depth: <br />2.65 ft <br />Top Width: <br />5.30 ft <br />Velocity: <br />16.82 fps <br />X- Section Area: <br />7.03 sq ft <br />Hydraulic Radius: <br />0.938 ft <br />Froude Number: <br />2.57 <br />Structure #2 (Pond <br />Sec 28 Sed Pond <br />Pond Inputs: <br />Initial Pool Elev: 7,064.50 ft <br />Initial Pool: 1.67 ac -ft <br />Perforated Riser <br />Riser <br />Riser Height <br />Barrel <br />Barrel Barrel Slpe <br />d <br />Number of <br />Spillway Elev <br />Diameter <br />(ft) <br />Diameter <br />meter <br />Length (ft) ( /o o) <br />Ho <br />s n Holes per <br />Manning (ft) <br />(in) <br />(in) <br />Elev <br />18.00 6.60 <br />18.00 150.00 2.00 <br />0.0150 7,069.60 2 <br />Pond Results: <br />Emergency Spillway <br />Spillway Elev Crest Length Left Right Bottom <br />(ft) Sideslope Sideslope Width (ft) <br />7,077.00 30.00 2.00:1 2.00:1 30.00 <br />Peak Elevation: 7,073.28 ft <br />Dewater Time: 1.65 days <br />Dewatering time is calculated from peak stage to lowest spillway <br />Elevation - Capacity- Discharge Table <br />17 <br />Filename: Sec 28 100 24.sc4 Printed 12 -08 -2010 <br />Exh. 7- 20A -56 Revision Date: 12/31/10 <br />Revision No.: TR -81 <br />