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Soil <br />Symbol <br />Soil Name <br />Thickness <br />(inches) <br />Soil Erodibility <br />Factor (KW) <br />Avg. Soil <br />Erodibility Factor <br />(K) <br />Irrigated <br />Pasture Area <br />(acres) <br />5p , { t • r ., r. r r0 , V ,• <br />14 <br />Barx <br />2 <br />0.24 <br />0.39 <br />11.2 <br />Barx <br />21 <br />0.32 <br />Barx <br />51 <br />0.43 <br />77 <br />Pinon <br />5 <br />0.28 <br />0.32 <br />10.8 <br />Pinon <br />11 <br />0.37 <br />Progresso <br />7 <br />0.37 <br />Progresso <br />7 <br />0.24 <br />Progresso <br />10 <br />0.28 <br />Progresso <br />12 <br />0.32 <br />78 <br />Pinon <br />5 <br />0.28 <br />0.22 <br />6.6 <br />Pinon <br />11 <br />0.37 <br />Ustic <br />Torriorthents <br />4 <br />0.15 <br />Ustic <br />Torriorthents <br />27 <br />0.15 <br />Composite Soil Erodibility Factors (K) <br />0.32 <br />Table 2- Comuosite Soil Erodibility Factor <br />Note: The map units used in the calculation of the soil erodibility factor are from the NRCS soil survey of the area, <br />not from WFC's pre -mine soil surveys. <br />SL -14 03DEC12.wpd 32 <br />