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<br />• <br />• <br />0.125 30 87 52 <br />0.063 26 82 38 <br />0.016 IS 60 21 <br />0.003 10 33 11 <br />0.0001 0 0 0 <br />' Derived from Plate V-2" Exhibit 50, EM 110.2-1906 <br />' From previous analysis submissions <br />3.1.3 Erodibility Factor 'K' <br />The erodibility factor of a soil refers to the susceptibility of soil particles to detachment and [ransport by <br />rainfall and runoff(the higher the number the more susceptible to erosion). The "K" factors selected for use <br />in this analysis are as follows: <br />"K" Factors <br />Soil "K" Source or Reference <br />#l, Coal Product 2 estimate <br />#2, Fughes 0.24 Soils of Colorado, Loss Factors <br /> and Erodibility Hydrologic Group- <br /> ings, 7983, Soil Conservation <br /> Service (SCS) <br />#3, Alluvium .15 SEDCAD+ guide <br />3.1.4 Hydrologic Classification <br />The hydrologic classifica[ion is based on the infiltration rate of a soil. The ratings are: A (low runoff <br />potential), B (moderately low runoff potential), C (moderately high runoff potential), or D (high runoff <br />potential). Hydrologic classifiptions aced in this analysis are as follows: <br />Hydrologic Classifications <br />Soil Hydrologic Classification Source or Reference <br />#1, Coal Product B estimate, based on large particle <br /> size and expectation of above <br /> average infiltration <br />#2, Fughes C Soils of Colorado, Loss Factors <br /> and Erodibiliy Hydrologic Group- <br /> ings, 1983, Soil Conservation <br /> Service (SCS) <br />#3, Alluvium B estimate based on coarse texture <br /> and above average infiltration <br />• 3 <br />