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• with an understory of native grasses and shrubs. This mapping unit is <br />non-irrigated and used for wildlife habitat, watershed, and livestock <br />grazing. <br />N 28 Curecanti verv cobbly sandv loam. This deep, well drained soil is <br />found on fan terraces and is formed in mixed alluvium. Typically, the <br />surface layer is dark brown, very cobbly sandy loam about 6 inches thick. <br />The subsoil is very cobbly sandy clay loam about 14 inches thick. The <br />substratum to a depth of 60+ inches is very cobbly sandy loam. The soil <br />is neutral. Slope is ]5 to 45 percent. Permeability is moderate. <br />Available water capacity is low. Runoff is medium to rapid and the danger <br />of erosion is moderate to very high. The potential plant community is <br />mostly grassland. The area is used for rangeland. <br />~ 30 Dumps and Pits. This soil type consists of coal mine tailings piles <br />and other industrial tailings within the area. The fill material consists <br />• mainly of thin stratifications of sandy loam, loam, sand earth, and thin <br />layers of coal chips. The areas are partially revegetated with grasses <br />and shrubs. <br />N 39 Granile verv gravelly sandv loam. This deep, well drained soil <br />consists of a very gravelly sandy loam found on mountainsides. It formed <br />in residuum and colluvium derived dominantly from sandstone. The surface <br />layer is dark grayish brown, very gravelly sandy loam about 2 inches <br />thick. In some areas the soil surface is stony. The subsurface layer is <br />mainly brown, very gravelly sandy loam about 17 inches thick. The subsoil <br />is extremely gravelly sandy clay loam to a depth of 60+ inches. The soil <br />is neutral to a depth of 2 inches, strongly acid to a depth of 32 inches, <br />and slightly acid below that depth. Slope is 25 to 45 percent. <br />Permeability is moderate. Available water capacity is low. Runoff is <br />rapid and erosion hazard is very high. The major plant community on this <br />unit is Douglas fir with a sparse understory of evergreen shrubs and <br />sedges. Major land uses are woodland, wildlife habitat, and recreation. <br />• k 52 Kim Casca.io Complex. This mapping unit, found on breaks where <br />stream terraces cut through fans and fan terraces and on fan terraces, is <br />composed of 50 percent Kim soil and about 35 percent Cascajo soil. The <br />2.04.9-7 <br />