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Left <br />Sideslope <br />Ratio <br />Right <br />Sideslope <br />Ratio <br />Slope (%) Manning's n <br />Freeboard <br />Depth (ft) <br />Freeboard <br />% of Depth <br />Freeboard <br />Mult. x <br />(VxD) <br />Limiting <br />Velocity <br />(fps) <br />1.5:1 1.5:1 8.0 0.0250 6.0 <br /> Erodible Channel Results: <br />w/o Freeboard w/ Freeboard <br />Design Discharge: 3.21 cfs <br />Depth: 0.57 ft <br />Top Width: 1.72 ft <br />Velocity: 6.48 fps <br />X-Section Area: 0.49 sq ft <br />Hydraulic Radius: 0.239 ft <br />Froude Number: 2.13 <br />Structure #24 (Culvert) <br /> Culvert 67 <br /> Culvert Inputs: <br />Length (ft) Slope (%) Manning's n <br />Max. <br />Headwater <br />(ft) <br />Tailwater <br />(ft) <br />Entrance <br />Loss Coef. <br />(Ke) <br />60.00 2.00 0.0150 5.00 0.00 0.90 <br /> Culvert Results: <br />Design Discharge = 3.21 cfs <br />Minimum pipe diameter: 1 - 10 inch pipe(s) required <br />Structure #23 (Null) <br /> Null Below Culvert 67 <br />Structure #22 (Erodible Channel) <br /> Road Ditch to Culvert 65 <br /> Triangular Erodible Channel Inputs: <br />Material: Shales and hardpans <br />Left <br />Sideslope <br />Ratio <br />Right <br />Sideslope <br />Ratio <br />Slope (%) Manning's n <br />Freeboard <br />Depth (ft) <br />Freeboard <br />% of Depth <br />Freeboard <br />Mult. x <br />(VxD) <br />Limiting <br />Velocity <br />(fps) <br />1.5:1 1.5:1 6.0 0.0250 6.0 <br /> Erodible Channel Results: <br />Filename: Exhibit 7 Item 23 Part B 10-Yr 24-Hr Section 25 During Mining.sc4 Printed 03-17-2022 <br />SEDCAD 4 for Windows <br />Copyright 1998 -2010 Pamela J. Schwab <br />Civil Software Design, LLC 15