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Knight Piesold <br /> CONSULTING Table4.3 <br /> Cripple Creek and Victor Gold Mining Co. (Newmont) <br /> Cripple Creek and Victor Mine <br /> Stormwater Management Plan Evaluation <br /> Modified EMP 22 Spillways Outlet Channels(Chutes) Detailed Hydraulic Sizing Calculation Results <br /> Parameter Spillway Chute <br /> EMP22-1 Chute EMP22-2 Chute <br /> Chute length (ft) 60 30 <br /> Design flow rate (cfs), Q100/24 11 11 <br /> Design longitudinal slope (%), S 40.0 30.0 <br /> Design bottom width (ft), Bf 10.0 10.0 <br /> Design side-slope (xHAV), Z 2.0 2.0 <br /> Design allowable normal flow depth (ft), Dn 0.3 0.3 <br /> Design freeboard depth (ft), Dfb 1.0 1.0 <br /> Design channel depth (ft), Dc 1.3 1.3 <br /> Design riprap median diameter (in), D50 6 6 <br /> Design Manning's roughness (-), n 0.11 0.11 <br /> Design riprap safety factor (-), SF 1.7 2.1 <br /> Flow velocity (fps), v 3.7 3.4 <br /> Froude number (-), Fr 1.2 1.1 <br /> Notes: <br /> 1. Riprap sizing based on United States Federal Highway Administration (FHWA) Hydraulic Engineering <br /> Circular (HEC) No. 15 shear stress method (FHWA, 2005) for slopes less than 20%. Riprap sizing for slopes <br /> greater than 20% is based on the method proposed in Design of Rock Chutes (Robinson et al., 1998). <br /> 2. Results based on the 100-year/24-hour routed peak flows. <br /> 3. Dimensions/parameters may differ slightly from design drawings. Design drawing dimensions/parameters, <br /> as shown on cross-sections and in design tables, to be used as final for this stage of design. <br />