2007-08-10_REVISION - M2001107 - Laserfiche WebLink

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EXHIBIT I Soils Information According to the Soil Survey of Weld County, Colorado, Southern Part (United States Department of Agriculture, Natural Resource Conservation Service, Web Soil Survey 1.1 National Cooperative Soil Survey), there are two major soil types within the proposed amendment area: 1. Aquolls and Aquents, gravelly substratum 2. Bankard Sandy Loam, 0 to 3 percent slopes The location of these soil types is illustrated on the attached Natural Resources Conservation Service map and legend. A boring location map and boring logs by Terracon showing the soil strata on the amendment area tract have also been attached. Aquolls and Aquents, gravelly substratum This map unit is typically on bottom lands and flood plains of major streams. Aquolls make up about 60% of the unit and are dark colored at the surface. Aquents have a lighter color surface layer and makeup 35% of the unit. The other 5% is Aquents and Bankard sandy loam. The soils of this land type are deep, poorly drained soils that formed in recent alluvium. The water table is at or near the surface early in spring and recedes to as deep as 48 inches in the fall in certain years. These soils are used for rangeland and wildlife habitat. Some areas have been reclaimed by major drainage and leveling and are used for irrigated crops. These soils have good potential as a source of sand and gravel. The potential native vegetation is alkali sacaton, switchgrass, and western wheatgrass. Saltgrass, sedge, rush, and alkali bluegrass are also prominent. As range condition deteriorates the saltgrass, sedge, and rush increase. Bankard Sandy Loam. 0 to 3 Dercent This is a deep and excessively drained soil on floodplains at elevations of 4,450 to 5,000 feet. The soil formed in stratified recent alluvium along streams and rivers. The surface layer of this soil is brown sandy loam about four inches thick. The underlying material is pale brown calcareous sand stratified with thin lenses of sandy loam, loam and fine gravel to a depth of 60 inches. The permeability of this soil type is moderately rapid and available water capacity is low. Surface runoff is low and the erosion hazard is low. The potential native vegetation is switchgrass, indiangrass, sand bluestem, sand reedgrass, sideoats gramma, needleandthread, and blue grams. As range conditions deteriorate the tall and mid grasses decrease and blue grams, sand dropseed, and (orbs increase. Undesirable weeds and annuals invade when conditions become poorer. This soil is generally not suited for the growing and growth of trees and shrubs. M-2001-107 NCCI Pft #7 DRMS 112 Permit Amendment 74