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Vegetative Cover Factor C <br /> The C factor takes into account surface characteristics that affect soil particle detachment. Data <br /> collected from reference areas (pre-mining) and Phase II evaluation (post-mining) were used to <br /> determine C Factors. The table below presents the C Factors calculated using RUSLE 1.06c for each <br /> vegetation community and timeframe along with the inputs used to derive those results. <br /> C Factor for Colowyo Mine <br /> Pre-Mining Post-Mining <br /> Parameter (Ref Area) (Revegetation) <br /> Canopy Cover % 43.19 40.00 <br /> Rock Cover % 0.90 1.80 <br /> Litter Cover % 53.78 49.63 <br /> Fall Height ft 1.0 0.5 <br /> Effective Root Mass Ibs/ac 1296 1200 <br /> Roughness (Index) 0.8 1.1 <br /> Land Use (Index) 4 4 <br /> C-Factor 0.0106 0.0084 <br /> Conservation Practice Factor P <br /> The P factor quantifies conservation practices employed at Colowyo. A default value of 1.0 was <br /> used for Pre-Mining conditions. Contouring was entered into RUSLE 1.06c to account for reclamation <br /> practices,this yielded a P-factor of 0.3 for Post-Mining conditions. <br /> 11 <br />