Laserfiche WebLink
West Elk Mine - Mine Water Control Plan Mountain Coal Company <br />3.4.4 Particle Size Distribution <br />. SEDCAD requires the particle size distribution of the erodible material be entered. Four particle <br />size distributions, obtained from previous modeling, were used in the SEDCAD analysis. At the <br />main mine site, soils were distinguished between silt loam (most of the site), river alluvium, and <br />coal product. A single distribution was used within Sylvester Gulch, where no significant <br />alluvium or coal stockpiles exist. <br />0 <br />• <br />Tetra Tech October 2008 6