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<br />i <br /> <br />Exhibit i -Soils Information <br />The atI'ected azea ties at an elevation of about 5,330 feet and has slopes ranging from nearly level <br />to a few percent. The soils are developed in alluvium and are generally deep and foamy to sandy- <br />textured. The area was mapped by the USDA Soil Conservation Service (SCS) in 1985. <br />Descriptions of soil units given below are based on an adaptation of the available SCS data. A <br />soils map showing the general delineation of the soils present in the permit azea follow this <br />section. The Wann soil type is present is most of the disturbed area associated with the Phase I <br />mining area. Kim loam is present in the Phase II mining area. The Torriftuvents soil type is <br />located along the southern boundary of the permit area and in the Phase III mining area. <br />40 -Kim loam <br />This deep, well drained, gently to sloping soil is on aNuvaial fans and benches. Elevation ranges <br />from 5,000 to 6,000 feet. The soils are on slopes of about 3 to 6 percent. This soil is formed in <br />alluvium derived from shale and sandstone. <br />Typically the surface layer is a yellowish brown or light yellowish brown loam about 17 inches <br />thick. The underlying material is light brownish gray loam to a depth of about 60 inches. In <br />places the underlying material is stratified with fine sandy loam. Permeability is moderate, and <br />available water capacity is high. The surface runoff is slow and the erosion potential is moderate. <br />A representative profile of the Kim loam is included herein. Included with this soil in mapping are <br />small areas of Arvada and Olney soils that have slopes of 3 to 6 percent. These areas makeup 5 <br />to 1 S percent of the map unit. <br />This soil is used mainly for crops, hay, and pasture. Alfalfa, small grains, and grass orgrass- <br />legume mixtures are grown. This soil is irrigated by flooding or furrows. Sprinklers are also <br />suitable. Drop structures in ditches control water and prevent excessive ditch erosion. <br />The native vetetation on this soil is mainly wheat grasses, needleandthread, and sagebrush. <br />65-Torrifluvents <br />This broadly defined unit consists of deep, well drained to somewhat poorly drained, nearly level <br />soils on flood plains adjacent to the Colorado and Roaring Fork Rivers and their major tributaries. <br />Slope is 0 to 6 percent. The soils formed in alluvium.These soils are stratified and vary widely in <br />texture and depth. The surface layer ranges from loamy sand and fine sandy loam to silty loam <br />and clay loam. The underlying layers are generally sandy loam or loam stratified with sand, <br />gravel, and cobbles. In some areas gravel and cobbles are on or near the surface. <br />The water table fluctuates between depths of 2 and 4 feet. and in some years is near the surface <br />during spring runoff from snowmelt. These soils are subject to brief, occasional flooding late in <br />spring and earl y in summer. <br />Page I - 1 <br />