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Exhibit I — Soils Information <br />Paul Banks and Associates, LLC <br />Please refer to Exhibit C -2: Pre - Mining Map (Natural Features) for mapped USDA soils. <br />Overview <br />Four soil types exist within the proposed permit area. These include Limon Silty Clay <br />Loam (LnA), Apishapa Silty Clay (Ap), Bloom Silt Loam (Bm), and Las Animas Fine <br />Sandy Loam (Lm). Additional soil types surrounding the permit area include Cascajo <br />Very Gravelly Sandy Loam, Otero Sandy Loam, and Otero Clay Loam. <br />Limon Silty Clay Loam (LnA) can be found in the northeast corner of the site. This soil is <br />found on 0 to 2 percent slopes and is deep and well- drained. In a representative profile <br />the surface layer is grayish -brown silty clay loam about 4 inches thick. The subsurface <br />layer is light brownish -gray silty clay about 14 inches thick. The underlying material is <br />light brownish -gray silty clay about 17 inches thick over light brownish -gray silty clay <br />loam that extends to a depth of 60 inches or more. Permeability is slow, and the <br />available water capacity is high. The surface and subsurface layers are moderately <br />alkaline and the underlying material is moderately alkaline or strongly alkaline. The root <br />zone extends to a depth of more than 60 inches. These soils are used for grazing and <br />irrigated crops. Runoff is medium. The hazard of erosion is generally moderate, but it is <br />severe in places. Deep gullying and soil piping are hazards where the range is <br />overgrazed. The soil is generally not subject to flooding, but long, narrow, nearly level <br />areas along Dry Creek, Haynes Creek, and Kramer Creek and similar areas are subject <br />to frequent, brief flooding. This soil is difficult to till because it is cloddy when dry and <br />sticky and plastic when wet. The native grasses are mainly galleta, blue grama, and <br />alkali sacaton (USDA, SCS). <br />Apishapa Silty Clay (Ap) is found in the northern section of the permit area and occurs <br />on 0 to 2 percent slopes. This soil is mainly on flood plains of the Arkansas River. In a <br />representative profile the surface layer is grayish -brown silty clay about 8 inches thick. <br />The upper part of the underlying material is grayish -brown silty clay about 5 inches thick, <br />the next 16 inches is grayish -brown clay, and the lower part is light brownish -gray clay <br />that extends to a depth of 60 inches or more. Permeability is slow, and the available <br />water capacity is high. The surface and subsurface layers are moderately alkaline, and <br />the underlying material is strongly alkaline. The root zone extends to a depth of 60 <br />St. Barbara Sand and Gravel Mine 10031 <br />Pete Lien & Sons, Inc. 22 June 15, 2011 <br />