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KENNECOTT ENERGY CORPORATION <br />COLOWYO MINE <br />• 009A -Section 16 Watershed SEDCAD Model Input <br />Structure 1, Subwatershed 1 (S1-SWS1) <br />Disturbance: <br />Topsoil & Seeded: 0 acres <br />1-2 Year Reclamation: 6.95 acres <br />3+ Year Reclamation: 14.90 acres <br />Undisturbed: 0 acres <br />Total Subwatershed Area: 21.85 acres <br />Hydrology: <br />Time of Concentration: <br />Elevation Length Description <br />100 900 Upland <br />55 700 Diversion <br />Curve Number: 58 <br />Sediment: <br />• Rainfall Factor.' 19 <br />Sail Erodibility Factor.' 0.28 <br />Length-Slope Factor.' <br />Elevation Length Slope <br />45 450 10.0% <br />155 1050 14.8% <br />Average <br />100 750 12.4% <br />Control Factor: 0.03 <br />Practice Factor: 0.38 <br />i• <br />