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KENNECOTT ENERGY CORPORATION <br />COLOWYO MINE <br />• 001A -Streeter Watershed SEDCAD Model Input <br /> Structure 2, Subwatershed 2 (S2-SWS2) <br /> Disturbance: <br /> Topsoil & Seeded: 12.64 acres <br /> 1-2 Year Reclamation: 14.13 acres <br /> 3+ Year Reclamation: 90.62 acres <br /> Undisturbed: 0 acres <br /> Total Subwatershed Area: 117.39 acres <br /> Hydrology: <br /> Time of Concentration: <br /> Elevation Length Description <br /> 50 500 Upland <br /> 275 2700 Grassed Channel <br /> 73 2550 Channelw/Baseflow <br /> Curve Number.' 6D <br />• Sediment: <br />ll F <br />t <br />R <br />i <br />f <br />1'9 <br /> ac <br />a <br />n <br />a <br />or. <br /> Soil Erodibility Factor: 0.26 <br /> Length-Slope Factor: <br /> Elevation Length Slope <br /> 50 400 12.5°6 <br /> 50 500 10.0°0 <br /> Average <br /> 50 450 11.3°io <br /> Control Factor. 0.70 <br /> Practice Factor: 0.38 <br />• <br />