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

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RULE 2 PERMITS RL Rock Ledge The soil series are delineated on the Soils - North Map (Map 5) and the Soils - South Map (Map 6). Soil profile descriptions and Range Site Descriptions from information provided by Soil Conservation Service are found in Exhibit 9, Soils Information. The descriptions of the soils series are as follows: 03B—Havre Fine Sandy Loam,0 to 5 Percent Slopes This is a deep,well drained soil that occurs along drainage ways in and adjacent to the permit area. A very small area (about: 1 acre) of this series was disturbed by the access road, no additional activity is anticipated on areas of this series. Therefore, detailed chemical and physical data has not been collected for this series. It developed in stratified alluvium from sandstone and shale and is on flood plains and terraces. The average annual precipitation ranges from 12 to 16 inches, the average annual soil temperature is 42°to 47°F, and the frost-free season is 75 to 95 days. Included with this soil in mapping are small areas of Homelake, Glendive, and Havre saline phase soils. Typically the surface layer is a dark gray fine sandy loam about 3 inches thick. The substratum is calcareous and stratified with colors of gray, light brownish gray, and pale brown. Textures are fine sandy loam, loam, sandy clay loam, silt loam, and silty clay loam. Mottling may occur below 40 inches. Permeability is moderate. The available water capacity is high.Effective rooting depth of 60 inches or more. Surface runoff is slow, and the erosion hazard is moderate from wind and low from water. Most of this mapping unit is used for non-irrigated and irrigated hay and pasture. Present and potential productivity of the soil is good. 14E—Burnette Loam, 12 to 25 Percent Slopes This is a deep,well drained soil that occurs throughout the area to be mined. This soil provides the best and most abundant source of plant growth medium of the soils in the permit area. The depth of useable soil is extremely variable, depending upon slope and location, and in the bottom of the Streeter drainage the A horizon has been found to be as thick as twenty (20) feet. The soil developed in mixed sandstone and shale and is found on upland valley sideslopes and benches. The average annual precipitation ranges from 16 to 18 inches,the average annual soil temperature is 43°F to 45°F, the mean summer soil temperature is 56 to 56°F., and the frost-free season is 70 to 90 days. Included within this mapping unit are a few small areas of sandstone or shale outcrops and small areas of Work and C'anupspass soils. Rule 2 Permits 2.04-44 Revision Date: 12/20/19 Revision No.: TR-135