2020-03-24_PERMIT FILE - C1981019A (5)

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RULE 2 PERMITS 104-Borolls-Rock Outcrop Complex This moderately steep to very steep complex is on north and west valley sideslopes and ridges. The soil occurs throughout the permit area. In the areas where rock outcrop do not occur,the solids have a good potential for reclamation. The average annual precipitation ranges from 15 to 18 inches, the average annual soil temperature is 42°F to 47°F, and the frost-free season is 75 to 95 days. The Borolls make up about 50 percent of this complex and occupy lesser slopes. The Sandstone Rock outcrop part makes up about 30 percent of this complex and occupies steeper slopes and ridgetops. Included with this complex in mapping are a few small areas of shale outcrops and shallow shale soils which make up the other 20 percent. The Borolls are shallow to deep, medium to fine textured, well drained soils over interbedded sandstone and shale at a depth of 10 to 60 inches. They may be cobble or stone filled. Typically the surface layer is dark grayish brown sandy loam or loam from 8 to 20 inches thick. The subsoil, where present, is grayish brown sandy clay loam, or clay from 10 to 20 inches thick. The substratum is light brownish gray sandy loam or sandy clay loam. Soft interbedded sandstone and shale are at depths ranging from 10 to more than 60 inches. The Boroll portion has moderate to rapid permeability and the available water capacity ranges from low to high. The effective rooting depth is from 10 to 60 inches or more. Surface runoff is medium, and erosion hazard is slight to moderate from wind and high from water. Most of the Boroll portion is native range and used for grazing. Present and potential productivity is poor. 105—Kemmerer-Moyerson Silty Clay Loams,20 to 40 Percent Slopes These moderately steep and steep soils are on foothill ridge crests and sideslopes near the center of the permit area. A very small area (less than 1 acre) of this series was disturbed by the access road.No additional activities are planned in areas covered by this soil,therefore detailed chemical and physical data has not been collected for this series. The average annual precipitation is about 13 to 16 inches,the average annual air temperature is about 45°F. Kemmerer soil makes up about 45 percent of the mapping unit and Moyerson soil about 40 percent. Small areas of a soil similar to Kemmerer soil but is deep, and Pinelli soils make up the other 15 percent. Kemmerer soil is a moderately deep, well drained soil. It is formed in weathered residuum from Mancos shale. Typically the surface layer is a light brownish gray silty clay loam about 3 inches thick. The substratum is a light brownish gray silty clay and overlies soft Mancos shale at a depth of 28 inches. Permeability is slow and available water capacity is low. Surface runoff is rapid, and erosion hazard is moderate. Myerson soil is astrallow, well drained soil. It is formed in iesiduunl in Mallet's shale. Rule 2 Permits 2.04-49 Revision Date: 12/20/19 Revision No.: TR-135