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~J <br />Mountain Coal Company Exhibit ?? <br />West Elk Mine Characteristics of West Elk Mine Soil Mapping Units <br />Mappino Unit Number l - Shallow (less than 20 inches to bedrock), light colored. <br />loamy to clayey. undeveloped soils having no soil horizonation other than a sliehtly <br />darkened surface horizon, or inconsistent weak horizons of secondary carbonate <br />accumulation. occurring in parts of the study area where mean summer soil temperature <br />(June, July, and Aueust mean temperature measured at 20 inches or at bedrock. <br />whichever is more shallow) is J9°F or warmer. <br />Classitication of Major Components -The components lis[ed below comprise the major <br />part of the mapping unit: <br />• <br />A. Ustic Torriorthents (Lithosols and Regosols of semi-arid areas). <br />1. Loamy, mixed, (calcareous), mesic, shallow family. <br />(Shingle Series) <br />(Tassel Series) <br />2. Loam, mixed, (calcareous), frigid, shallow family. <br />(Blazon Series) <br />(Shinbara Series) <br />3. Clayey, montmorillonitic, (calcareous), frigid, shallow family. <br />(Samsil Series) <br />4. Clayey, montmorillonitic, (calcareous), frigid, shallow family. <br />(Moyerson Series) <br />B. Lithic Ustic Torriorthents (Lithosols of semi-arid regions). <br />1. Loamy, mixed, (calcareous), mesic family <br />(Lazear Series) <br />(Travessilla Series) <br />Extent and Major Areas of Occurrence - Mapping unit number 1 is an extensive unit <br />in the study area. It occurs at elevations of less than 7,800 feet. Greatest acreages are <br />to be found in the western and northern points of the study area. <br />Characteristic Toooeraohv - Typically the soils of mapping unit number 1 occur on <br />ridge crests and shoulders, adjacent to upland escarpments, on upper footslopes. or on <br />the edges of deeply incised drainage channels. <br />They may occur at times on less steeply sloping mesa or ridge tops or at the margins of <br />young alluvial fans, where the sedimentary bedrocks are close to the surface of the <br />ground. <br />Generally these soils are associated with the points of erosion where normal ••~earing <br />• away of the land surface has prevented soil formation. Slopes range about ~ to 60 <br />percent. <br />Exhibit 27-1 <br />