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Structure Detail: <br />Structure #7 (Riprap Channel) <br /> D-2 Ditch <br /> Trapezoidal Riprap Channel Inputs: <br />Material: Riprap <br />Bottom <br />Width (ft) <br />Left <br />Sideslope <br />Ratio <br />Right <br />Sideslope <br />Ratio <br />Slope (%)Freeboard <br />Depth (ft) <br />Freeboard <br />% of Depth <br />Freeboard <br />Mult. x <br />(VxD) <br />12.00 2.0:1 2.0:1 4.9 3.91 <br /> Riprap Channel Results: <br />Simons/OSM Method - Steep Slope Design <br />w/o Freeboard w/ Freeboard <br />Design Discharge: 3.76 cfs <br />Depth: 0.09 ft 4.00 ft <br />Top Width: 12.34 ft 27.98 ft <br />Velocity*: <br />X-Section Area: 1.04 sq ft <br />Hydraulic Radius: 0.084 ft <br />Froude Number*: <br />Manning's n*: <br />Dmin: 1.00 in <br />D50: 3.00 in <br />Dmax: 3.75 in <br />Velocity and Manning's n calculations may not apply for this method. <br />Structure #6 (Vegetated Channel) <br /> D-4 Ditch 7+50 to 37+41 <br /> Trapezoidal Vegetated Channel Inputs: <br />Material: Tall fescue <br />Bottom <br />Width (ft) <br />Left <br />Sideslope <br />Ratio <br />Right <br />Sideslope <br />Ratio <br />Slope (%)Retardance <br />Classes <br />Freeboard <br />Depth (ft) <br />Freeboard <br />% of Depth <br />Freeboard <br />Mult. x <br />(VxD) <br />Limiting <br />Velocity <br />(fps) <br />12.00 2.0:1 2.0:1 5.9 D, B 3.25 6.0 <br /> Vegetated Channel Results: <br />Filename: Section 26 10-Year 24-Hour During Mining.sc4 Printed 03-14-2022 <br />SEDCAD 4 for Windows <br />Copyright 1998 -2010 Pamela J. Schwab <br />Civil Software Design, LLC 7