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230 -Haploborolls - Ustochrepts -Rock outcrop complex <br />230 -Haploborolls - Ustochrepts -Rock outcrop complex, 40 to 99 percent slopes <br />• SETTING <br />Landforms: mountain, canyon, and ridge side slopes <br />Elevation: 6,200 to 9,700 feet <br />Mean annual air temperature: 38 to 45 degrees F <br />Mean annual precipitation: 14 to 26 inches <br />Frost-free period: 70 to 100 days <br />CHARACTERISTICS OF THE HAPLOBOROLLS SOIL <br />Parent material: residuum and colluvium from mixed sources <br />Dominant native plants: Gambel oak, Utah serviceberry, Kentucky bluegrass, mountain big <br />sagebrush <br />Typical Profile: <br />0 to 11 inches -gray stony clay loam <br />11 to 34 inches -very pate brown stony sandy loam <br />34 to 60 inches -light gray very stony loam <br />Depth class: deep to very deep <br />Drainage class: well drained <br />Permeability: moderately slow <br />Available water capacity: low to moderate <br />Potential rooting depth: 20 to 60 or more inches <br />Surface runoff: very rapid <br />Hazard of water erosion: high <br />Shrink-swell potential: moderate <br />Mass movement potential: low to moderate <br />CHARACTERISTICS OF THE USTOCHREPTS SOIL <br /> <br />Parent material: residuum and colluvium from mixed sources <br />Dominant native plants: Gambel oak, mountain big sagebrush, Utah serviceberry, Kentucky <br />bluegrass <br />Typical Profile: <br />0 to 4 inches • brown gravelly loam <br />4 to 40 inches -brown very stony sandy clay loam <br />40 inches -weathered sandstone bedrock <br />Depth class: shallow to very deep <br />Drainage class: well drained <br />. Permeability: moderate <br />Available water capacity: very low to low <br />Potential rooting depth: 10 to 60 or more inches <br />Soils Description Report -West Elk Mine <br />Deeembe- 1994 WESTEC 51 <br />