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Knight Piesold <br /> CONSULTING Table2.6 <br /> Cripple Creek and Victor Gold Mining Co.(Newmont) <br /> Cripple Creek and Victor Mine <br /> Stormwater Management Plan Evaluation <br /> Existing Spillway Chutes 100-year/24-hour Storm Event Evaluation <br /> Parameter Spillway Chutes <br /> EMP17a Chute EMP17b Chute <br /> EMP EMP8c Chute Chute <br /> Cross-section number 1 (upstream) 2 (downstream) <br /> As-built longitudinal slope(%), S 15.0 5.0 1.5 1.5 8.0 1.0 1.0 11.0 <br /> As-built bottom width (ft), Bf 12.0 20.0 1.7 5.0 10.0 4.0 4.0 0.7 <br /> As-built left side-slope(xH:1 V),Z 2.0 9.7 2.3 2.8 14.0 2.0 2.0 4.0 <br /> As-built right side-slope(xH:i V),Z 2.0 5.0 2.3 3.7 3.5 2.0 2.0 3.6 <br /> As-built channel depth (ft), Dc 2.0 2.0 3.6 2.4 NA 1.6 3.0 1.8 <br /> As-built freeboard depth (ft), Dfb 1.0 1.0 1.0 1.0 NA 1.0 1.0 1.0 <br /> As-built allowable normal flow depth(ft), Dn 1.0 1.0 2.6 1.4 NA 0.6 2.0 0.8 <br /> As-built riprap median diameter(in), D50 12 6 6 6 6 6 9 <br /> As-built Manning's roughness(-), n 0.08 0.05 NA 0.05 NA 0.08 0.04 0.07 <br /> As-built riprap safety factor(-), SF 1.34 1.39 NA 1.86 NA 4.64 4.64 0.98 <br /> As-built flow capacity(cfs),Qab 90 153 111 50 0 4 65 12 <br /> 100-year/24-hour flow rate (cfs),Q100/24 118 29 36 30 30 10 10 13 <br /> Capacity-Sufficient or Insufficient Sufficient Sufficient Sufficient icient Sufficient <br /> Riprap D50-Sufficient or Insufficient Sufficient Sufficient Insuffi ' n Sufficient Insufficient Sufficient Sufficient nsu <br /> Notes: <br /> 1. Capacity is deemed sufficient if the as-built flow capacity is equal to or greater than the 100-year/24-hour flow rate.Otherwise, insufficient. <br /> 2. Riprap D50 is deemed sufficient if the as-built riprap safety factor is equal to or greater than 1.2 for the 100-year/24-hour flow rate.Otherwise, insufficient. <br />