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Typically the surface layer is a dark gray fine sandy loam about 3 <br />inches thick. The substratum is calcareous and stratified with <br />colors of gray, light brownish gray, and pale brown. Textures are <br />fine sandy loam, loam, sandy clay loam, silt loam, and silty clay <br />loam. Mottling may occur below 40 inches. <br />Permeability is moderate. The available water capacity is high. <br />Effective rooting depth of 60 inches or more. Surface runoff is <br />slow, and the erosion hazard is moderate from wind and low from <br />water. <br />Most of this mapping unit is used for non-irrigated and irrigated <br />hay and pasture. Present and potential productivity of the soil is <br />good. <br />14E-Burnette Loam. 12 to 25 Percent Slopes <br />This is a deep, well drained soil that occurs throughout the area <br />to be mined. This soil provides the best and most abundant source <br />of plant growth medium of the soils in the permit area. The depth <br />of useable soil is extremely variable, depending upon slope and <br />location, and in the bottom of the Streeter drainage the A horizon <br />has been found to be as thick as twenty (20) feet. The soil <br />developed in mixed sandstone and shale and is found on upland <br />valley sideslopes and benches. The average annual precipitation <br />ranges from 16 to 18 inches, the average annual soil temperature is <br />43°F to 45°F, the mean summer soil temperature is 56 to 56°F., and <br />the frost-free season is 70 to 90 days. <br />Included within this mapping unit are a few small areas of <br />sandstone or shale outcrops and small areas of Work and Campspass <br />soils. <br />The duff layer consists of decomposed and undecomposed leaves, <br />twigs, and grass. Typically the surface layer is a dark grayish <br />brown loam about 20 inches thick. The subsoil is a light yellowish <br />brown clay loam about 25 inches thick. The substratum is a light <br />yellowish brown clay loam to a depth of 60 inches. <br />Permeability is moderate. The available water capacity is high. <br />Effective rooting depth is 60 inches or more. Surface runoff is <br />slow, and the erosion hazard is moderate from wind and high from <br />water. <br />Most of this mapping unit is native range and used for grazing. <br />Present and potential productivity of this soil is good. <br />14F-Burnette Loam. 25 to 65 Percent Slopes <br />This soil has the same characteristic as the previous soil, except <br />it is found on steeper slopes. It developed in mixed sandstone and <br />. shale and is on upland valley sideslopes. The average annual <br />2.04.9-3 <br />