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Exhibit B <br />Site Description <br />SR -13A Mine Permit Amendment <br />M -1977 -311 <br />A: Soils and Vegetation Description <br />Soils <br />The major soil types found in the region of the SR -13A Mine as defined by the United <br />States Department of Agriculture Web Soil Survey (USDA WSS) are: <br />1. 40- Farb -Rock outcrop complex, 1 to 30 percent slopes <br />2. 43- Fluvaquents, 1 to 6 percent slopes, frequently flooded <br />3. 45- Gladel- Bond -Rock outcrop complex <br />4. 52- Killpack- Deaver loams, 2 to 15 percent slopes <br />5. 57- Minchey fine sandy loam, 1 to 10 percent slopes <br />6. 87 -Rock outcrop <br />7. 88 -Rock outcrop - Orthents complex <br />A complete description of each soil type as well as general locations of each type within <br />the SR -13A permit area are included in the WSS report and map below. <br />The main surface disturbance will be located in Rock outcrop (Soil map unit 87) and in <br />Rock outcrop - Orthents complex (Soil map unit 88). The dominant parent material for <br />these soils is sandstone with some shale and colluvium. <br />The Rock outcrop and Rock outcrop - Orthents complex are relatively unproductive and <br />thin with bedrock outcrops. These soils can be described as warm, shallow, well - drained, <br />sloping soils found on rock outcrops on breaks and canyons. <br />This mapping unit can be divided into three general components. Rock outcrops account <br />for about 45 percent of the unit. These are largely of sandstone, with some small shale <br />outcrops. About half the unit is in shallow (20 inches or less) and stony soils, generally <br />with a light - colored, loamy surface layer. Mixed alluvial soils of the Dolores and San <br />Miguel River bottoms account for about six percent of the mapping unit. <br />The dominant ground cover associated with these units is pinon-juniper. At higher <br />elevations, oakbrush, serviceberry, and grasses are more prevalent, while willows and <br />cottonwoods may be found along the narrow valleys. <br />There is no appreciable topsoil surrounding the portal area because it is located in a <br />sandstone outcrop. However, the area beneath the portal, to the west of the waste dump, <br />exhibits a sandy to sandy loam soil of a 6 to 10 inch depth. <br />B -1 <br />