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This is a very deep soil which has formed in residuum and colluvium derived from sandstone and shale. <br />It is found on rolling uplands and broad ridgetops at elevations ranging from 7900 to8400 feet. It is a <br />well-drained soil with moderate permeability. Available water holding capacity is high, runoff is <br />medium, and the erosion hazard is moderate to high. The vegetation type is sagebrush-grassland. <br />In a typical profile, the topsoil is loam or sandy loam 10 to 13 inches thick. The subsoil is loam, clay <br />loam, sandy clay loam, or sandy loam 16 to 26 inches thick. The substratum is a very gravelly sandy clay <br />loam, channery clay, or channery sandy loam about 15 inches thick. Depth to bedrock is 45 to 60 inches. <br />RBD -Rhone-Burnette Loams. 10-45 % slopes have approximately 42 inches of salvageable soil. Slope, <br />shallow depth to bedrock, and excessive charmers in the substratum may limit salvage depth in some <br />areas. <br />These are deep soils which have formed in residuum and colluvium derived from sandstone and shale. <br />They are found on rolling and broad uplands and mountain sideslopes at elevations ranging from 7800 to <br />8400 feet. Tltey are well-drained soils with moderate permeability. Available water holding capacity is <br />moderate to high, runoff is medium, and erosion hazard is moderate to high. The vegetation type is <br />mountain shrubland. <br />In a typical profile, the topsoil is loam, sandy loam, clay loam, or clay 6 to 13 inches thick. The subsoil is <br />sandy loam, silt loam, or clay 16 to 36 inches thick. The substratum is clay loam, clay, channery clay, or <br />channery sandy loam I S to 18 inches thick. Depth to bedrock ranges from 40 to 60 inches. <br />RD - Redisturbed areas have 18 inches of salvageable soil. This map unit is composed of areas <br />previously disturbed as a result of coal mining activities which have been reclaimed. Reclamation <br />included redistribution of 18 inches of suitable soil. <br />SA -Silas Loams. 0-3 % slopes have approximately 58 inches of salvageable soil. This map unit is <br />found in valley bottoms, portions may be too wet to salvage. <br />This deep soil has developed in alluvium derived from sandstone and shale. It is found in the West Fork <br />Good Spring Creek valley at elevations of 6900 to 7200 feet. It is awell-drained soil with moderate <br />permeability. Available water holding capacity is high, runoff is slow, the erosion hazard is low, and <br />flooding hazard is occasional. The vegetation is meadow consisting of mixed grasses, big sage, and (orbs. <br />In a typical profile, the topsoil is fine sandy loam or loam 12 to 35 inches thick. The subsoil is a fine <br />sandy loam, clay loam, gravelly loam, or cobbly loam 25 to 45 inches thick or more. Depth to bedrock <br />exceeds 60 inches. <br />SBC -Silas Loams, 5-30 % slopes have approximately 50 inches of salvageable soil. Because the map <br />unit is found in narrow valley bottoms adjacent to steep slopes, salvage in some areas Wray prove <br />impractical. <br />This is a deep soil which has developed in alluvium derived from sandstone and shale. It is found in <br />sloping swales and narrow draws in uplands at elevations ranging from 7000 to 8100 feet. It is a well- <br />drained soil with moderate permeability. Available water holding capacity is high, runoff is medium, the <br />erosion hazard is moderate, and the flooding hazard is rare. The vegetation type is sagebrush-grassland. <br />Atypical profile is the same as for the Silas Loam, 0 m 3 percent slopes <br />Revision Date: _ 11/30/06 -~ <br />~evision Number: ~ PR-02 <br />