Laserfiche WebLink
197 - Torriorthents-Rock outcrop, Sandstone complex, 25 to 75 percent slopes <br />This unit is on hills and mountain slopes. Elevation is 6,000 to 8,000 feet. The average annual <br />precipitation is 9 to 16 inches, the average annual air temperature is 42 to 45 degrees F, and the <br />average frost-free period is 75 to 105 days. <br />This unit is 55 percent Torriorthents and similar soil and 35 percent Rock outcrop. <br />The Torriorthent soil is well drained and slowest permeability is moderate. Available water <br />holding capacity is very low and runoff is very high. Effective rooting depth is 4 to 30 inches to <br />bedrock. It is formed in residuum and colluvium derived from sandstone and shale. <br />Typically, the Torriorthent soil surface layer is channery sandy loam 4 inches thick. The upper <br />part of the subsoil is channery sandy loam to channery clay loam 11 inches thick. The lower part <br />to a depth of 19 inches is unweathered bedrock. <br />The rock outcrop drainage and slowest permeability is unspecified. Available water holding <br />capacity is very low. Effective rooting depth is 0 inches to bedrock. Runoff is very high. <br />206 -Ustorthents, Frigid-Borolls complex, 25 to 75 percent slopes <br />This unit is on mountain slopes. Elevation is 7,000 to 8,500 feet. The average annual <br />precipitation is 16 to 20 inches, the average annual air temperature is 37 to 45 degrees F, and the <br />average frost-free period is 50 to 85 days. <br />• This unit is 55 percent Ustorthents and similar soil and 35 Borolls and similaz soil. <br />The Ustorthents soil is well drained and slowest permeability is moderate. Available water <br />holding capacity is very low and runoff is high. Depth to restrictive feature is 10 to 30 inches to <br />bedrock. It is formed in residuum and colluvium derived from sedimentary rocks. <br />Typically, the Ustorthents soil surface layer is very channery sandy loam 3 inches thick. The <br />upper part of the subsoil is extremely channery sandy loam to very channery loam 25 inches <br />thick. The lower part to a depth of 32 inches is unweathered bedrock. <br />The Borolls is well drained and slowest permeability is moderately slow. It is formed in <br />residuum and colluvium derived from sedimentary rocks. Available water holding capacity is <br />low. Effective rooting depth is 20 inches to bedrock. Runoff is very high. <br />Typically, the Borolls soil surface layer is loam 16 inches thick. The upper part of the subsoil is <br />extremely stony sandy loam to clay loam 19 inches thick. The lower part to a depth of 39 inches <br />is unweathered bedrock. <br />216 -Yamo loam, 3-15% slopes <br />The Yamo series consists of very deep, weal-drained soils that are found on the toeslopes of hills <br />and benches. Yamo soils aze formed in alluvium derived from sandstone and in loess. Elevation is <br />6,200 to 7,000 feet. The average annual precipitation is 1 I to 13 inches, the average annual air <br />. temperature is 42 to 45 degrees F., and the average frost-free period is 75 to 95 days. <br />