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KENNECOTT ENERGY CORPORATION <br />COLOWYO MINE <br />• 007A -Prospect Watershed SEDCAD Model Input <br /> Structure 4, Subwatershed 2 (S4-SWS2) <br /> Disturbance: <br /> Topsoil 8. Seeded: 0 acres <br /> 1-2 Year Reclamation: 14.30 acres <br /> 3+ Year Reclamation: 0 acres <br /> Undisturbed: 39.10 acres <br /> Total Subwatershed Area: 53.40 acres <br /> Hydrology: <br /> Time of Concentration: <br /> Elevation Length Description <br /> 235 1850 Grassed Waterway <br /> 130 350 Grassed Waterway <br /> 125 2650 Diversion <br /> Curve Number.' S1 <br />• Sediment: <br />Rainfall Factor: <br />19 <br /> <br /> Soil Erodibility Factor: 0.28 <br /> Length-Slope Factor.' <br /> Elevation Length Slope <br /> 235 1600 14.7% <br /> 175 850 20.6% <br /> Average <br /> 205 1225 17.6% <br /> Control Factor: 0.07 <br /> Practice Factor: 0.76 <br />• <br />