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0.4% Noxious Weeds <br />0.3% Annual Forbs <br />26.4% Perennial Grasses <br />45.7% Perennial Forbs <br />15.9% Litter <br />Ground Cover (cover that contacts the surface) = Annual forbs + Perennial Grasses + <br />Perennial Forbs + Litter + Noxious Weeds <br />Ground Cover = 88.7% <br />Canopy Cover = None <br />Canopy Cover = 0% <br />Using Table 3 and a canopy of 0% and the "G" canopy type, the C factor can be <br />calculated. An interpolation is required to determine the value for 88.7% ground cover: <br />AC = AC <br />88.7-80 95-80 <br />x-0.013 = 0.003-0.013 x 0.007 <br />8.7 15 <br />Therefore, the best "C" value for the post-mine irrigated pasture is 0.007. <br />Summary of "C" Factors <br />Pre-Mine Irrigated Pasture 0.003 <br />Post-Mine Irrigated Pasture 0.007 <br />SL-12 29MARIl.wpd 23