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KENNECOTT ENERGY CORPORATION <br />COLOWYO MINE <br /> <br /> <br />• <br />0 acres <br />0 acres <br />35,43 acres <br />23.61 acres <br />59.04 acres <br />Elevation Length Description <br />10 244 Upland <br />50 ~ 1159 Grassed Channel <br />75 856 [7iversian <br />Streeter Wa#ershed SE©CAD Madel Inpu# <br />Structure 4, Subwatershed 1 <br />Disturbance: <br />Topsail & Seeded: <br />1-2 Year Reclamatian: <br />3+ Year Reclamation: <br />Undisturbed: <br />Total Subwatershed Brea: <br />Hydrology: <br />Trine of Concentration: <br />Curve Number: <br />5edlment: <br />Rainfall Factor <br />Sail Erodrbilrty Fac#ar. <br />Length-Srape Factor: <br />Elevation Length <br />62 680 <br />40 400 <br />Average <br />51 <br />Control Facfor.• <br />Practice Factor: <br />540 <br />Exh. 7-SP-14 <br /> <br />19 <br />0.28 <br />Slope <br />9.1 <br />i0A°~ <br />9.6°/a <br />0.03 <br />0.59 <br />Revision Date: 2/1/06 <br />Revision No.: TR-63 <br />