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Wattenberg Lakes Amendment, Exhibit I—Soil Information May 2023 <br /> SOIL INFORMATION <br /> According to the Web Soil Survey online database map pulled on April 6, 2023 for the DRMS permit amendment <br /> area located in Unincorporated Weld County, Colorado[Web Soil Survey (usda.gov)1, there are three major soil <br /> types within the project site: <br /> 1. Altvan loam <br /> 2. Aquolls and Aquents <br /> 3. Dacono clay <br /> The location of these soil types is illustrated on the attached map and Custom Soils Report. <br /> Altvan Loam: <br /> The Altvan loam soil type is present within the proposed project site at 0 to 1 percent slopes and 1 to 3 percent <br /> slopes. They are deep, level and nearly level, well-drained terrace soils formed in alluvium. Permeability and <br /> available water capacity are moderate. For the lower sloping areas, surface runoff is slow, and the erosion hazard <br /> is low. In areas with steeper slopes, surface runoff is medium, but the erosion hazard is still low. <br /> This soil is used almost entirely for irrigated crops. It is suited to all crops commonly grown in the area, but the <br /> high clay content and rapidly permeable substratum slightly restrict some crops. The potential is only fair to good <br /> for urban and recreational development. The main limitations are the shrink swell, potential of the subsoil as it <br /> wets and dries and the rapid permeability of the sand and gravel substratum. The soil can produce habitat <br /> elements that are highly suitable for open-land wildlife including pheasant, cottontail, and mourning dove. <br /> Plantings of trees and shrubs commonly grown in the area are generally well suited to the soil. <br /> Aquolls and Aquents,gravelly substratum: <br /> The Aquolls and Aquents are deep, level and nearly level, poorly drained soils formed in alluvium. Located on <br /> flood plains along major streams throughout the area, the soil type is found in areas that are subject to flooding. It <br /> is also the roost dominant soil type within the proposed project site. The Water table is at or near the surface early <br /> in spring and recedes to as deep as 48 inches late in fall. <br /> Areas containing these soils are used mainly for rangeland and wildlife habitat. The potential is good for <br /> development of wetland wildlife habitat and also as a source of sand and gravel. Wetness and the hazard of <br /> flooding are the main limitations in farming and for most other purposes. <br /> Dacono Clay: <br /> The Dacono clay soil type is present within the proposed project site at 0 to 1 percent slopes and 1 to 3 percent <br /> slopes. They are deep, level and nearly level, well-drained terrace soils formed in alluvium. Permeability is <br /> moderately slow and available water capacity moderate. For the lower sloping areas. Surface runoff is slow, and <br /> the erosion hazard is low. In areas with steeper slopes surface runoff is medium, but the erosion hazard is still <br /> low. <br /> The soil type is used almost entirely for irrigated crops. It is suited to all crops commonly grown in the area, but <br /> the high clay content and rapidly permeable substratum slightly restrict some crops. The soil is only fair to good <br /> for urban and recreational development. The moderate to high shrink-swell potential, low strength, and <br /> moderately slow permeability create problems in dwelling and road construction. The soil can produce habitat <br /> elements that are highly suitable for open-land wildlife including pheasant, cottontail, and mourning dove. <br /> Plantings of trees and shrubs commonly grown in the area are generally well suited to this soil. <br /> OTETRA TECH P a g e 1 1 <br />