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• EXHIBIT 27 - Continued <br />R60 = Cryorthents steep, 15 to 30 percent slopes. <br />This unit includes a variety of shallow soils that differ in <br />depth, color, texture, reaction, and mineralogy. They are on steep <br />terrace breaks and upland ridges at elevations of 7,800 to 9,200 feet. <br />These soils are generally less than 20 inches deep over soft <br />shale or sandstone and have little or no horizon development. <br />Included are areas that are deep and cobble-filled or have <br />various depths of cobbly material over shale. In some areas on terraces, <br />aide slopes, and breaks, the cobbly overburden is deeper at the upper <br />part of the elope. <br />Available water capacity is generally low. Surface runoff is <br />rapid. Erosion hazard is severe from wind and water. <br />• <br />Most of this unit is native rangeland used for Limited live- <br />stock grazing and wildlife habitat. <br />Disturbed, 12 to 20 percent slopes. <br />This is a deep, well-drained soil on a strongly sloping to <br />moderately steep sides lope at elevations of 8,100 to g,250 feet. It <br />formed in material redistributed after mining was completed at the old <br />Sudduth Mine. Due to the disturbance in this area, the soil found at the <br />site does not fit the national soil classification system. Standard <br />procedures were followed in sampling this site to provide useful data in <br />describing the area. The average annual precipitation, temperature and <br />frost-free season would be similar to contiguous soils such as Fluetsch <br />sandy loam. <br />Typically the surface layer is very dark grayish brown loam or <br />• sandy clay loam about six to 20 inches thick. The subsoil is dark brown <br />sandy clay loam extending to 60 inches or more. <br />