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SOILS INFORMATION <br />EXHIBIT I <br />A survey of the site soils was prepared by the United States Department of Agriculture, <br />Soil Conservation Service, in Durango, Colorado for the (`ugnini's in the fall of 1992 fortlfe <br />purpose of this report. The soils types aze delineated on the accompanying report. The soils types <br />aze delineated on Map C-1. 'The soil and vegetationboundaries are identical. 'The irrigated <br />pastures exist on the flat mesa top azeas. The dominant soil type is the Faifa Clay Loam. The dry <br />rangeland slopes have very little soil cover with a dominant soil type of Ustic'1'orriorthents- <br />Ustollic Haplargids. The valley floor soil and vegetation community has a dominant soil type of <br />Mikim Loam. <br />U1' The soil mapping units that occur on the area to be disturbed are classified as the U stic <br />Torriorthents- Ustollic Haplargids complex with 12-16 percent slopes. This map unit is on <br />terraced edges, mesa edges and hillsides. Elevation is 6,000 to 8,500 feet in elevation. The <br />unit is 50 percent Ustic Torriorthents and 30 percent Ustollic Haplargids. The Ustollic <br />Haplazgids aze in the less sloping areas. <br />Ustic Torriorthents are deep and somewhat excessively drained. These soils form in <br />outwash. No single profile of Ustic'1'omorthents is typical, but one commonly observed in <br />the survey area has a surface layer of gravellly or cobbly loam or fine sandy loam. The <br />subsoil is very cobbly or very gravelly loam, very gravelly or very cobbly sandy clay loam, <br />or very gravelly or very cobbly fine sandy loam The substratum is very gravelly or very <br />cobbly outwash. <br />Permeability of these Usitc Tomorthents and Ustollic Haplargids varies depending on the <br />texture of the parent material. 1~:Y3ective rooting depth is 40 inches or more. Available <br />water capacity is low. Runoff is rapid, and the hazazd or erosion is high. <br />FCL Another type of soil found in the area is the Falfa Clay Loam which is awell-drained soil <br />on the mesa tops. It formed is calcareous loess. <br />Cugnini 12/03 31 <br />