Laserfiche WebLink
Natural Channel Middle Pond to Section 36 Pond <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 />5.00 2.0:1 2.0:1 6.4 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: 21.59 cfs 21.59 cfs <br />Depth:0.62 ft 0.99 ft <br />Top Width:7.49 ft 8.95 ft <br />Velocity:5.55 fps 3.13 fps <br />X-Section Area: 3.89 sq ft 6.89 sq ft <br />Hydraulic Radius:0.500 ft 0.732 ft <br />Froude Number:1.36 0.63 <br />Roughness Coefficient:0.0427 0.0977 <br />Structure #8 (Pond) <br /> Middle Pond <br /> Pond Inputs: <br />Initial Pool Elev: 7,057.00 ft <br />Initial Pool: 0.53 ac-ft <br />Perforated Riser <br />Riser <br />Diameter <br />(in) <br />Riser Height <br />(ft) <br />Barrel <br />Diameter <br />(in) <br />Barrel <br />Length (ft) <br />Barrel Slope <br />(%)Manning's n Spillway Elev <br />(ft) <br />Number of <br />Holes per <br />Elev <br />18.00 10.00 18.00 198.00 5.00 0.0150 7,061.00 2 <br />Emergency Spillway <br />Spillway Elev Crest Length <br />(ft) <br />Left <br />Sideslope <br />Right <br />Sideslope <br />Bottom <br />Width (ft) <br />7,066.00 38.00 3.00:1 3.00:1 24.00 <br /> Pond Results: <br />Peak Elevation: 7,064.46 ft <br />Dewater Time: 1.28 days <br />Filename: Exhibit 7 Item 23 Part B 25-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 14