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E X H I B I T I <br /> ' SOILS I IVFC3RMAT I ON <br /> Two soil types occur on site as mapped by the USDA Soil <br /> Conservation Service, Weld County Survey and are described by <br /> ' them as follows: <br /> Aquolls and aquents, gravelly substratum (3) , a nearly level <br /> ' map unit , occurs on bottom lands and floodplains of major <br /> streams. These are deep, poorly drained soils that formed in <br /> recent alluvium. <br /> ' Commonly, the soils have a mottled, mildly to moderately <br /> alkaline loamy or r_layev surface layer and underlying material , <br /> underlain by sand or sand and gravel within 4(3 inches. In <br /> ' places, they have a gleyed layer in the underlying material . The <br /> water table is at or near the surface early in spring and recr=des <br /> to as deep as 48 inches in late fall some years. <br /> ' The aquolls and aquents mapping unit generally has 10 to 24 <br /> inches of plant growth medium, however, localized scouring from <br /> flooding may have exposed the gravelly subsoil . <br /> ' Altvan loam, o to 1 percent slopes, makes up approximately <br /> six acres at the extreme southeast corner of the permit. area. <br /> ' This map unit includes areas of poor drainage with small long and <br /> narrow areas of sand and gravel deposits. <br /> Typically, the surface layer is grayish brown loam about ten <br /> t inches thick:. The substratum is calcareous loamy sand about six <br /> inches thick over gravelly sand. <br /> Permeability and available water capacity are moderate. The <br /> effective rooting depth is Z!) to 40 inches. Surface runoff is <br /> slow with a low erosion hazard. <br /> ' Topsoil on site is of poor quality with a six inch average <br /> depth. Since approximately 14" acres is to be surface water , <br /> there will be enough topsoil to cover the shoreline and non-water <br /> ' surface areas to a 8-10 inch depth. <br /> 9 1 <br /> f <br /> I-1 <br />