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SEDCAD 4 for Windows <br />r,.~„~,.ti~ ~ooa _onm o~..,oi~ i c~ti~.,~ti <br />5 <br />Structure Detai/; <br />Structure #I1 (Erodible Channel) <br />Section 29 Collector Ditch <br />Trapezoidal Erodible Channel Inputs: <br />Material: Shales and hardpans <br />Bottom Left Right Freeboard Freeboard Freeboard Limiting <br />Sideslope Sideslope Slope (%) Manning's n <br />Width (ft) R <br />ti <br />R <br />ti Mult. x <br />Depth (ft) % of Depth Velocity <br />s) <br />(f <br />a <br />o <br />a <br />o (VxD) p <br />12.00 2.0:1 2.0:1 2.0 0.0250 6.0 <br />Erodible Channel Results: <br /> w/o Freeboard w/ Freeboard <br />Design Discharge: 7.30 cfs <br />Depth: 0.21 ft <br />Top Width: 12.82 ft <br />Velocity: 2.86 fps <br />X-Section Area: 2.55 sq ft <br />Hydraulic Radius: 0.198 ft <br />Froude Number: 1.13 <br />Structure #10 (Riprap Channel) <br />Section 28 Collector Ditch, Upper portion <br />Trapezoidal Riprap Channel Inputs: <br />Material: Riprap <br />Left Right <br />Bottom Freeboard Freeboard Freeboard <br />Sideslo a Sideslo a Sloe <br />Width (ft) p p p ( ) <br />Ratio Ratio <br />Depth (ft) % of De th Mult. x <br />p <br /> (VxD) <br />12.00 2.0:1 2.0:1 16.0 <br />Riprap Channel Results: <br />Simons/OSM Method -Steep Slope Design <br />w/o Freeboard w/ Freeboard <br />Design Discharge: 7.30 cfs <br />Depth: 0.07 ft <br />Filename: Sec2829Ditch 1024E.sc4 Printed 08-27-2008 <br />Exh. 7-20D-9 Revision Date: 08/27/08 <br />Revision No.: TR-75 <br />