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TABLE 3 <br /> Sedimentation Pond Design - Soils Information <br /> Nucla Mine, Colorado <br /> Soil Type Hydrologic "k" <br /> or Area Soil Group Factor <br /> 18/F-2 D 0.14 <br /> 5810/2B-1 B 0.17 <br /> 5810/7C-2 B 0.17 <br /> 5810E/D-2 B 0.17 <br /> 581OI/3B-2 B 0.17 <br /> 581OI/7C-1 B 0.17 <br /> 9904/D-1,2 D 0.22 <br /> 9904/F-2 D 0.22 <br /> Reclaimed C 0.25 <br /> Active Pit + Spoil Piles C 0.21 <br /> Non-topsoiled Regraded Spoil C 0.23 <br /> Topsoil Removed D 0.32 <br /> Soil information included for Technical Revision existing pits and <br /> Permit Revision (scraper pits) . Source: Gary Wendt, Soil Scientist, <br /> Peabody Coal Company (September 15, 1986) . <br /> SEDIMENTOLOGY <br /> The SEDIMOT II computer program was also utilized to calculate the <br /> sedimentology of each watershed using the modified universal soil loss <br /> equation (MUSLE) . Using 87 lbs/cubic foot, 0.48 acre-feet (903.79 tons) <br /> will be deposited in this sediment pond as the result of a 10-year, <br /> 24-hour storm. The following paragraphs describe the sources of data <br /> used as input for the MUSLE calculations. <br /> Soil Erodibility Factors (K) <br /> Tab 9 of the current Nucla Mine Plan contains the results of the Soil <br /> Resources Survey. These results indicate that the soils in the area <br /> have soil erodibility factors in the range of 0.14 to 0.32. In an <br /> effort to be conservative, Peabody will use the largest soil erodibility <br /> factor found in each subwatershed (see Table 3) . <br /> Length - Slope Factors (L,S) <br /> Length and Slope Factors for each subwatershed were determined by <br /> measuring representative overland flow paths on topo maps within the <br /> 6 <br />