2008-05-12_PERMIT FILE - M2008030

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J. .. i a. EXHIBIT I There are three soil types in the proposed area for the gravel pit. These soils are 18- Haxtun Loamy Sand, 29-Manter Loamy Sand, and 43-Valent Sand, 1 to 9 percent slopes. The Haxtun Loamy Sand is a deep, well drained, sandy soil in the south and north central parts of the county. It was developed in eolian sand which covers an older buried soul. Most of this soil is located in depressed areas in and around the sandhills. The areas range to 500 acres in size. Slopes are mainly 0 to 3 percent but range to 5 percent in some small areas. Inclusions in this mapping unit are Daily loam sand, which makes up about 5 percent of the map unit, and Manter loamy sand, which makes up about 10 percent. Typically, the surface layer is grayish brown sandy loam about 10 inches thick. The upper subsoil is a dark grayish brown sandy loam about 10 inches thick. The lower subsoil is a very dark grayish brown sandy clay loam about 21 inches thick. The substratum, to a depth of 60 inches, is very pale brown, calcareous sandy loam. Permeability is moderate. The available water capacity is moderate. The effective rooting depth is 60 inches or more. Surface runoff is slow. Water erosion is a sight hazard, and soil blowing is a severe hazard. The potential native vegetation is dominantly sand bluestem, needelandthread, prairie sandreed, switchgrass, little bluestem, and blue grama. If the range is overgrazed, these grasses decrease in number, and sand sagebrush, sand dropseed, and wild buckwheat increase. Undesirable weeds and annual plants invade and increase as the range condition deteriorates. Badly depleted range can be improved by interseeding with a mixture selected from sand bluestem, sideoats grama, switchgrass, and indiangrass. Sand sagebrush management helps to increase production on overgrazed range. Capability subclass IIIe, nonirrigated and irrigated. The Manter loamv sand is a deep, well drained, nearly level soil on smooth plains. It formed in eolian sand. The areas of this soil are irregular in shape and range to 500 acres in size. Slopes generally are less than 2 percent. Typically, the surface layer is grayish brown loamy sand about 6 inches thick. The subsoil is dark brown sandy loam about 15 inches thick. The substratum, to a depth of 60 inches, is light gray, calcareous loam sand. In the northeastern part of the county, the substratum is light gray loam underlain by light fray fine sandy loam. Permeability is moderately rapid. The available water capacity is moderate. The effective rooting depth is more than 60 inches. Surface runoff is slow. Water erosion is a slight hazard, and soil blowing is a severe hazard.