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2.04.9 - SOIL RESOURCE INFORMATION <br />• Soil Resource Inventory <br />The U.S. Department of Agriculture Soil Survey of La Plata County, <br />Colorado (1988) identifies four soil series within three map units in the <br />area of the project to experience surface disturbance. The distribution <br />of the soil map units is depicted on map King II -006. Data sheets for <br />soil sample locations and analysis summaries are contained in Appendix <br />6. <br />Umbarg soils are found within the level colluvial deposits between the <br />bordering sideslopes of the drainage basins. These are fine - loamy, mixed <br />mesic Cumulic Haplustolls. These soils typically form in alluvium on <br />fans and upland valley bottoms. They are deep and moderately well <br />drained. <br />The presence of this soil series was confirmed by sampling at three <br />locations within the area of disturbance (sample points U1, U2, and U3). <br />Soil suitable for plant growth and revegetation was identified to an <br />average depth of 25.3 inches. <br />The Lazear -Rock Outcrop Complex was mapped and confirmed on the <br />northeast, south, and southwest facing drainage sideslopes within the <br />project area. This map unit comprises the Lazear series and exposed <br />rock outcrops (in this area, sandstone and shales). The Lazear series is <br />described as a loamy, mixed (calcareous), mesic Lithic Ustic Torriorthent. <br />This series is shallow and well - drained, formed in residuum and <br />alluvium derived from sandstone. <br />This soil map unit (and the Lazear series) was confirmed at two sample <br />sites on either side of the drainage basin in the location of the portals <br />and surface facilities (sample points LRO1 and LR02). Soil test pits <br />revealed variable depths of plant growth medium ranging from five to 28 <br />inches. Salvage within this soil type will be dependent on the near <br />surface proximity of sandstone outcrops. <br />The third soil map unit identified within the potential surface <br />disturbance area is the Archuleta- Sanchez Complex located on the <br />northwest facing sideslope along the east drainage basin arm. The <br />complex is comprised of 45 percent Archuleta loam and 30 percent <br />Sanchez very stony sandy clay loam. Remaining constituents are clays, <br />loams, and rock. <br />The single sample point (AS 1) within this complex revealed the presence <br />of the Sanchez series. This soil is a loamy - skeletal, mixed Lithic <br />Eutroboralf. These soils are shallow, well - drained and formed in <br />GCC Energy, LLC King II Mine <br />Section 2.04.9 <br />Page 1 October, 2008 <br />7/R -/S <br />