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002181_ . . <. aridic on south-facing slopes and ustic on north-facing slopes. Average annual soil temperature at 20 inches is,more than 470F. but less than 590F, mesic, and frost-free season is about 120-140 days. The association has about 45 percent Lithic Camborthids, 40 percent of Lithic Ustic Torriorthents, and about 15 percent of unidentified minor soils, located near the city of Rangely in Rio Blanco County, Lithic Camborthids are shallow, well-drained soils on sedimentary rocks. Typically these soils have a dark-colored, loamy surface layer, Al horizon, less than 7 inches thick. The subsoil, (10-20 inch layer), B2 horizon, is an altered, light-colored, loamy material that may have free carbonates. The substratum is fractured bedrock. Permeability is slow; effective rooting depth is less than 20 inches, Available water capacity is low-very low; surface runoff is rapid; erosion hazard is high-very high. Lithic Ustic Torrenthents are shallow, well-drained soils on sedimentary rocks. Typically they have a light-colored loamy surface layer, Al horizon, less than 7 inches thick. The upper substratum, 10-20 inch layer, C hori-, zon, is a calcareous, loamy material that may be strongly alkaline. The lower substratum is fractured bedrock, Permeability is slow; effective rooting depth is less than 20 inches. Available water capacity is low-very low; surface runoff is rapid and erosion hazard is high-very high, The sediment yield from the association is 0.5-3.0 acre-feet/square mile/year. These soils are used for range, woodland, wildlife, and watershed. General vegetative type i~ pinyon-juniper. Reclamation potential is poor due to excess slope and droughtiness. ,7 0:;,..:.:.;.._._"-" - :t ~ .:, ~L' '. ,'^ ---. -