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302 -Cumulic Haploborolls <br />302 -Cumulic Haploborolls, 1 to 3 percent slopes <br />SETTING <br />Landforms: alluvial terraces <br />Elevation: 7,200 to 8,300 feet <br />Dominant native plants: narrowleaf cottonwood, mountain big sagebrush, sulfur buckwheat, <br />Arizona fescue <br />Mean annual air temperature: 41 to 43 degrees F <br />Mean annual precipitation: 16 to 20 inches <br />Frost-free period: 85 to 95 days <br />SOIL CHARACTERISTICS <br />Parent material: alluvium from mixed sources <br />Typical Profile <br />0 to 16 inches -dark grayish brown very gravelly loam <br />16 to 41 inches -yellowish brown stratified extremely cobbly loamy sand, sandy loam, and loam <br />41 inches -weathered bedrock <br />Depth class: deep to very deep <br />Drainage class: well to moderately well drained <br />Permeability: moderate <br />Available water capacity: low <br />Potential rooting depth: 40 to 60 or more inches <br />Surface runoff: very slow to medium <br />Hazard of water erasion: law <br />Shrink-swell potential: tow <br />Mass movement potential: low <br />COMPOSITION <br />Cumulic Haploborolls soil and similar soils: 85 percent <br />Contrasting inclusions: 15 percent <br />CONTRASTING INCLUSIONS <br />Five percent Shawa soils on the lesser sloping areas <br />Five percent Herm soils on the upper patt of the side slopes <br />Five percent Cryaquolls soils in depressions <br />MAJOR USES <br />Wildlife, recreation, livestock grazing <br />~J <br /> <br />• <br />Soils Description Report -West EIk Mine <br />December 1994 WESTEC 64 <br />