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AREA <br />R <br />K <br />LS <br />C <br />P <br />A <br />TONS/ <br />YEAR <br />1 <br />(Ft)' <br />SW end 13 mine pad <br />40 <br />.37 <br />2.07 <br />1 <br />1 <br />30.6 <br />3.67 <br />104.86 <br />Outslope rock tunnel pad <br />40 <br />.33 <br />3.0 <br />.24* <br />1 <br />9.5 <br />7.13 <br />203.71 <br />Outslope rock tunnel pad <br />40 <br />.33 <br />3.0 <br />.042 ** <br />1 <br />1.66 <br />1.25 <br />35.71 <br />016 pond topsoil pile <br />40 <br />.31 <br />2.8 <br />.043 <br />1 <br />1.49 <br />.16 <br />4.57 <br />Bathhouse berm <br />40 <br />.37 <br />2.6 <br />.028 <br />1 <br />1.08 <br />.13 <br />3.71 <br />Substation- No. 1 Mine <br />40 <br />.37 <br />.19 _ <br />1 <br />1 <br />1.27 <br />.05 <br />1.43 <br />South Portal No. 1 Mine <br />Material is rock, not soil. <br />applicable. <br />USLE not <br />* <br />** <br />C factor for 3/4 ton of mulch per acre adequately crimped. <br />C factor for 60% cover .type G mostly grass. <br />A = <br />R = <br />K = <br />LS = <br />C <br />P = <br />Small Area Exemptions <br />TR -20 10/91 <br />Page # Revised <br />MR -36 5/92 <br />11 <br />POTENTIAL SOIL LOSS <br />A = RKLSCP <br />SOIL LOSS (TONS /ACRE/YEAR) <br />RAINFALL AND RUNOFF FACTOR <br />SOIL ERODABILITY FACTOR <br />SLOPE LENGTH AND STEEPNESS FACTOR <br />COVER AND MANAGEMENT FACTOR <br />EROSION CONTROL PRACTICE FACTOR <br />56 <br />