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Most of the Boroll portion is native range and used for grazing. Present and potential <br />productivity is poor. <br />105 -Kemmerer-IyloYerson Silty Clay Loams, 20 to 40 Percent Slopes <br />These moderately steep and steep soils are on foothill ridge crests and sideslopes near the <br />center of the permit area. A very small area (less than 1 acre) of this series was disturbed by <br />the access road. No additional activities are planned in areas covered by this soil, therefore <br />detailed chemical and physical data has not been collected for this series. The average annual <br />precipitation is about 13 to l6 inches, the average annual air temperature is about 45°F. <br />Kemmer soil makes up about 4~ percent of the mapping unit and Moyerson soil about 40 <br />percent. Small areas of a soil similar to Kemmerer soil but is deep, and Pinelli soils make up <br />the other 15 percent. <br />Kemmerer soil is a moderately deep, well drained soil. It is formed in weathered residuum <br />from Mancos shale. <br />Typically the surface layer is a light brownish gray silty clay loam about 3 inches thick. The <br />substratum is a light brownish gray silty clay and overlies soft Mancos shale at a depth of 28 <br />inches. <br />Permeability is slow and available water capacity is low. Surface runoff is rapid, and erosion <br />hazard is moderate. <br />Moyerson soil is a shallow, well drained soil. [t is formed in residuum in Mancos shale. <br />Typically the surface layer is a light gray silty clay loam about 1 inch thick. The underlying <br />material is a light brownish gray gravelly, silty clay loam and overlies soft Mancos shale at a <br />depth of 17 inches. <br />105 -Kemmerer-Moyerson Silty CIa~Loams <br />Permeability is slow and available water capacity is low. Surface runoff is rapid and erosion <br />hazard is high. <br />• <br />2.04.9-9 <br />