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• Armelis, Cobbly Sandy Loam, 13 to 25 Percent Slopes. <br />(55C. Armelis, Cobbly Sandy Loam, 1 to 6 Percent Slopes). <br />(55D. Armelis, Cobbly Sandy Loam, 6 to 12 Percent Slopes). <br />This deep, excessively drained, moderately steep to hilly soil is on <br />Sedimentary uplands. It formed in loamy material weathered in place <br />from sandstone and shale and in colluvial deposits from these areas. <br />This soil in its three slope phases occurs along the haul road corri- <br />dor from the county road to the truck dump site, except for the last <br />2,000 feet. <br />The surface layer normally ranges from 6 to 13 inches and from sandy <br />loam to loam in texture. Amount of coarse fragments ranges from 15 to <br />30 percent. <br />• The subsurface layer ranges in thickness from 5 to 20 inches and from <br />sandy loam to loam in texture. Coarse fragments range from 20 to 40 <br />percent. The underlying material ranges from sandy loam to loam with <br />35 to 80 percent gravel, cobble, and stone. Reaction ranges from <br />mildly alkaline to moderately alkaline throughout the profile. <br />Included with this soil, on less than 15 percent of the area, are <br />small areas of Spang and Morval soils, both on less than 12 percent <br />slopes. <br />Permeability of the Armelis soil is moderately rapid. Effective <br />rooting depth is 30 to 40 inches. Available water holding capacity is <br />low. Surface runoff is medium and the erosion hazard is high. The <br />main factors limiting development on this soil are steep slopes, <br />susceptibility to piping, frost heave, and content of slopes. <br />The Armelis soil is similar to the Grobutte series, the two differing <br />primarily in terms of their coarse fragments. <br />3-117 <br />