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Narrative Descriptions of Soil Map Units -South Taylor Mine Area EXHIBIT 9, ITEM 6 Estimates of salvageable soil and a brief description of each map unit within the ST Mine Area that are located on 25 percent slopes or less are provided below. CVB -Castner-Vandamore Variant Complex 5-25 % slopes have approximately 21 inches of salvageable soil. Excessive stoniness and shallow depth to bedrock will limit salvageability in some areas. This complex includes Castner cobbly loam and Vandamore Variant flaggy sandy loam. These are shallow to moderately deep soils which have formed in residuum derived from sandstone and shale on narrow ridges and mountain sideslopes at elevations ranging from 7600 to 8400 feet. They are well- drained soils with moderate to high permeability. Available water holding capacity is low to moderate, runoff is medium, and the erosion hazard is moderate. The vegetation type is sagebrush-grassland. In a typical profile, the topsoil is cobbly loam, sandy loam, flaggy sandy loam, or sand clay loam 2 to 6 inches thick. The subsoil and substratum consist of cobbly to very cobbly or channery loam to sandy loam, cobbly clay or very cobbly loam about 18 inches thick. Depth to bedrock is from less titan 20 inches up to 40 inches. • CVD -Castner-Vandamore Variant Complex 25-55% slopes have approximately 14 inches of salvageable sail. Excessive stoniness and shallow depth to bedrock will limit salvageability m some areas. This complex includes Castner cobbly loam and Vandamore Variant flaggy sandy loam. These are shallow to moderately deep soils which have formed in residuum derived from sandstone and shale on narrow ridges and mountain sideslopes at elevations ranging from 7600 to 8400 feet. They are well- drained soils with moderate to high permeability. Available water holding capacity is low to moderate, runoff is medium, and the erosion hazard is moderate. The vegetation type is sagebrush-grassland. The Castner cobbly loam and Vandamore variant flaggy sandy loam soils are in parallel families (loamy- skeletal, mixed) and both are less than 20 inches deep. This map unit is characterized by sandstone flagstones on the surface and occurs mostly on convex positions on the mountainsides. DL -Disturbed land is characterized by soils with undeveloped profiles and, therefore, has no salvageable soil. This is a miscellaneous land type that occurs in areas of mining disturbance, drill sites, excavations, or landslides. Drainage, permeability, available water holding capacity, and vegetation type are variable. Runoff is rapid while the erosion hazard is high. The soil profile is undeveloped JBB -Jerry-Burnette Loams, 5-15 % slopes have approximately 0 inches of salvageable soil. The major limitation of these soils may be excessive clay content [n some areas, depth to bedrock and excessive gravel in the substratum may also limit salvage depth. • These are deep soils which have developed in colluvium and residuum derived from shale. They are found on broad uplands, ridges, and mountain sideslopes at elevations ranging from 7400 to 8300 feet. They are well-drained soils with slow to moderate permeability. Available water holding capacity is Revision Date: 11/30/06 Revision Number: PR-02