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240 -Coberly -Falcon, dry complex <br />240 -Coberly -Falcon, dry complex, 0 to 15 percent slopes <br />SETTING • <br />Landforms: mesa tops, ridges, benches <br />Elevation: 7,800 to 8,300 feet <br />Mean annual air temperature: 41 to 42 degrees F <br />Mean annual precipitation: 18 to 20 inches <br />Frost-free period: 85 to 90 days <br />CHARACTERISTICS OF THE COVERLY SOIL <br />Parent material: residuum from sandstone <br />Dominant native plants: Gambel oak, mountain snowberry, Utah serviceberry, nodding bromegrass <br />Typical Profile <br />0 to 24 inches -brown fine sandy loam <br />24 inches -weathered sandstone bedrock <br />Depth class: moderately deep <br />Drainage class: well drained <br />Permeability: moderately rapid <br />Available water capacity: low <br />Potential rooting depth: 20 to 40 inches <br />Surface runoff: very slow to rapid • <br />Hazard of water erosion: low <br />Shrink-swell potential: low <br />Mass movement potential: low <br />CHARACTERISTICS OF THE FALCON, DRY SOIL <br />Parent material: residuum from sandstone <br />Dominant native plants: western wheatgrass, antelope bitterbrush, hairy goldaster, Utah <br />serviceberry <br />Typical Profile <br />0 to 12 inches -brown fine sandy loam <br />12 to 17 inches -pale brown fine sandy loam <br />17 inches -hard sandstone bedrock <br />Depth class: shallow <br />Drainage class: well drained <br />Permeability: moderately rapid <br />Available water capacity: very low <br />Potential rooting depth: 10 to 20 inches <br />Surface runoff: very slow to rapid <br />Hazard of water erosion: low • <br />Shrink-swell potential: low <br />Soils Description Report -West Elk Mine <br />December 7994 WESTEC 58 <br />