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This series occurs in map unit WRU. It was sampled in typical • <br />pedon number 13 and in composite sample numbers 206/233 and 273/279. <br />Averaye lift 1 thickness is 16 inches, averaye lift 2 thickness is 46+ <br />inches, for an average total salyagable thickness for the series of <br />6U+ inches. <br />2.1.9 Rhone Loam <br />This soil is a deep, well drained, moderately permeable soil <br />formed in residuum and colluvium derived from sandstone and shale. It <br />occurs on rolling uplands and broad ridgetops on slopes of 10 to 60 <br />percent. The native vegetation is serviceberry, big sage and mountain <br />shrubs. The available water holdiny capacity is high. <br />In a typical profile, the surface layer is black to dark brown, <br />loam to sandy loam about 13 inches thick. The subsoil is very dark <br />brown, loam to clay loam or sandy loam about 16 inches thick. The <br />substratum is brown to dark yellowish brown, channery clay to channery <br />sandy loam about 15 inches thick. Depth to bedrock is 45 to 60 <br />inches. The series is within the tine-loamy, mixed family of Pachic <br />Cryoborolls. <br />The mollic epipedon averages 28 inches thick. Charmers are <br />generally 20 percent by volume throughout the profile. The surface <br />~ layer of the Rhone is a good source of lift 1 material. The subsoi l • <br />is suitable for lift 2 to the sandstone contact. <br />This series occurs in map units LRD, RR and RBD. It was sampled <br />in typical pedon number 15 and in composite sample numbers 106/24 and <br />53/8g. Averaye lift 1 thickness is 26 inches, averaye liftL <br />Thickness is 18 inches, for an average total salva9able thickness for <br />the series of 44 inches. <br />2.1.10 Silas Gravelly Loamy Sand <br />This soil is a very deep, we 11 drained, moderately permeable soil <br />formed in alluvium derived from sandstone and shale. It occurs on <br />valley bottoms on slopes of Z to 5 percent. The native vegetation is <br />mixed grasses and fortis. The available water holdiny capacity is <br />hlgh.. <br />In a typical profile, the surface layer is yellowish brown, <br />gravelly sandy loam overlying very dark brown to black, loam about 35 <br />inches thick. The subsoil is very dark grey to very dark yellowish <br />brown, yravelly loam, cobbly loam, or clay loam about 25 inches thick <br />or more. Depth to bedrock is greater than 6U inches. The series is <br />in the fine-loamy, mixed family of Cumulic Cryoborolls. <br />The S ilas yravelly loamy sand has a few inches to several feet of <br />recent sediment over a Silas profile. This phase of the Silas is not • <br />recommended for lift 1 because of the loamy sand surface layer, The <br />entire profile would be suitable for use as lifi `2. A groundwater <br />table may be encountered at depth. At Certain times and in places, <br />the soil may be difficult to salvage due to wetness. <br />12 <br />