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220 -Taterheap -Papaspila complex <br />220 -Taterheap -Papaspila complex, 5 to 40 percent slopes <br />SETTING • <br />Landforms: tops and side slopes of mesas, mountains, and benches <br />Elevation: 7,800 to 10,200 feet <br />Mean annual air temperature: 34 to 42 degrees F <br />Mean annual precipitation: 24 to 32 inches <br />Frost-free period: 55 to 75 days <br />CHARACTERISTICS OF THE TATERHEAP SOIL <br />Parent material: residuum and colluvium from andesite, rhyolite, and breccia <br />Dominant native plants: aspen, nodding bromegrass, blue wildrye, Columbia needlegrass <br />Typical Profile: <br />0 to 6 inches -very dark gray loam <br />6 to 14 inches -dark gray loam <br />14 to 42 inches -gray loam <br />42 to 60 inches -light yellowish brown very cobbly clay loam <br />Depth class: very deep <br />Drainage class: well drained <br />Permeability: moderately stow • <br />Available water capacity: high <br />Potential rooting depth: 60 or more inches <br />Surface runoff: medium to very rapid <br />Hazard of water erosion: low to high <br />Shrink-swell potential: low <br />Mass movement potential: low <br />CHARACTERISTICS OF THE PAPASPILA SOIL <br />Parent material: residuum and colluvium from andesite, rhyolite, and breccia. <br />Dominant native plants: aspen, blue wildrye, bearded wheatgrass, nodding bromegrass <br />Typical Profile: <br />2 inches to 0 -mat of intermediately decomposed grasses, twigs, and leaves <br />0 to 8 inches • very dark grayish brown loam <br />8 to 17 inches -dark grayish brown very gravelly Loam <br />17 to 33 inches -grayish brown eMremely cobbly loam <br />33 to 60 inches -pale brown extremely cobbly loam <br />Depth class: very deep <br />Drainage class: well drained <br />Permeability: moderate <br />Available water capacity: moderate <br />Potential rooting depth: 60 or more inches • <br />Surface runoff: medium to very rapid <br />Sols Description Report -West Elk Mine <br />December 1994 WESTEC 30 <br />