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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 />5.00 2.0:1 2.0:1 9.7 D, B 6.0 <br /> Vegetated Channel Results: <br />Stability <br />Class D w/o <br />Freeboard <br />Stability <br />Class D w/ <br />Freeboard <br />Capacity <br />Class B w/o <br />Freeboard <br />Capacity <br />Class B w/ <br />Freeboard <br />Design Discharge: 11.77 cfs 11.77 cfs <br />Depth: 0.42 ft 0.72 ft <br />Top Width: 6.70 ft 7.89 ft <br />Velocity: 4.73 fps 2.53 fps <br />X-Section Area: 2.49 sq ft 4.65 sq ft <br />Hydraulic Radius: 0.360 ft 0.565 ft <br />Froude Number: 1.37 0.58 <br />Roughness Coefficient: 0.0495 0.1252 <br />Structure #35 (Vegetated Channel) <br /> Natural Channel to Culvert 68 <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 />20.00 5.0:1 5.0:1 10.0 D, B 6.0 <br /> Vegetated Channel Results: <br />Stability <br />Class D w/o <br />Freeboard <br />Stability <br />Class D w/ <br />Freeboard <br />Capacity <br />Class B w/o <br />Freeboard <br />Capacity <br />Class B w/ <br />Freeboard <br />Design Discharge: 1.68 cfs 1.68 cfs <br />Depth: 0.10 ft 0.26 ft <br />Top Width: 21.03 ft 22.57 ft <br />Velocity: 0.79 fps 0.31 fps <br />X-Section Area: 2.11 sq ft 5.47 sq ft <br />Hydraulic Radius: 0.100 ft 0.242 ft <br />Froude Number: 0.44 0.11 <br />Roughness Coefficient: 0.1263 0.5945 <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 24