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Banks and Gesso, LLC <br />inches or more. These soils are used for irrigated crops and hay and for irrigated or <br />non-irrigated pasture. Runoff is slow, and the hazard of erosion is slight. In places the <br />soil is subject to occasional, brief flooding. A seasonal high water table is at a depth of 2 <br />to 3 feet. Aeration is poor below a depth of 2 or 3 feet because of the high water table. <br />A low to moderate concentration of salts tends to accumulate from irrigation water or <br />from evaporation of upward-moving capillary water from the seasonal high water table. <br />This soil is better suited to irrigated pasture than to other uses. The surface layer is <br />difficult to cultivate because of the silty clay texture. The native grasses are alkali <br />sacaton and inland saltgrass (USDA, SCS). <br />Bloom Silt Loam (Bm) can be found in the central portion of the permit area. This soil, <br />found along major drainageways, consists of deep, somewhat poorly drained soils and <br />has 0 to 2 percent slopes. In a representative profile the surface layer is light brownish- <br />gray silt loam about 8 inches thick and light-gray silty clay loam about 6 inches thick. <br />The underlying material is light-gray silty clay loam about 21 inches thick. Below that it <br />is light-gray and gray stratified silty clay loam and loamy very fine sand that extend to a <br />depth of 60 inches or more. Permeability is moderate and the available water capacity is <br />high. These soils are moderately alkaline. Their root zone extends to a depth of 60 <br />inches or more. They are used for pasture and farming. Runoff is slow, and the hazard <br />of erosion is moderate. The soil is subject to occasional, brief flooding. The seasonal <br />high water table is at a depth of 1.5 to 3 feet. There is a moderate to high concentration <br />of salts, and salts tend to accumulate on the surface in areas where the capillary <br />moisture from the ground water reaches the soil surface. This soil has a high potential <br />for pasture. The native grasses are mainly alkali sacaton and inland saltgrass, while <br />willow and tamarisk grow in places (USDA, SCS). <br />Las Animas Fine Sandy Loam (Lm) is found along the southern boundary of mining <br />limits. This soil, found on bottomlands of rivers and creeks, consists of deep, somewhat <br />poorly drained soils, with a slope of 0 to 2 percent. In a representative profile the <br />surface layer, about 6 inches thick, is very pale brown fine sandy loam that has <br />yellowish-brown mottles. The subsurface layer, about 12 inches thick, is very pale <br />brown stratified fine sand and fine sandy loam that has dark yellowish-brown and gray <br />mottles. The underlying material is about 23 inches of light brownish-gray fine sandy <br />loam that has dark-gray mottles over dark-gray stratified silty clay loam and fine sandy <br />St. Barbara Sand and Gravel Mine 03028 <br />Trans Colorado Concrete 23 February 19, 2004 <br />