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KENNECOTT ENERGY CORPORATION <br />COLOWYO MINE <br />• 001A -Streeter Watershed SEDCAD Model Input <br />Structure 3, Subwatershed 1 (S3-SWS1) <br />Disturbance: <br />Topsoil & Seeded: 123.51 acres <br />1-2 Year Reclamation: 3L3~1 acres <br />3+ Year Reclamation: 170.48 acres <br />Undisturbed: 0.18 acres <br />Total Subwatershed Area: 325.48 acres <br />Hydrology: <br />Time of Concentration: <br />Elevation Length Description <br />50 500 Upland <br />210 3250 Grassed Channel <br />80 2500 Channelw/Baseflow <br />Curve Number: 88 <br />• Sediment: <br />Rainfall F <br />t <br />: <br />19 <br /> ac <br />or <br /> Soil Erodibility Factor. 0.28 <br /> Length-Slope Factor.' <br /> Elevation Length Slope <br /> 125 1050 11.9°,~0 <br /> 125 900 13.9°,~0 <br /> 50 700 7.1 °,~o <br /> 75 850 8.8°,~0 <br /> 150 900 16.7°,~0 <br /> Average <br /> 105 880 11.7;6 <br /> Control Factor.' 0.32 <br /> Practice Factor: 0.36 <br />• <br />