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Mountain Coal Company Exhibit 27 <br />• West Elk Mine Characteristics of West Elk Mine Soil Mapping Units <br />A. Argic Cryoboroll (Chernozem). <br />1. Fine, montmorillonitic family. <br />(Gothic Series) <br />(Jerry Series) <br />B. Argic Pachic Cryoboroll (Chernozem). <br />1. Fine, montmorillonitic family. <br />(Cochetopa Series) <br />(Fulcher Series) <br />Extent and Major Areas of Occurrence - Mapping unit number X31 has a lar_e total <br />acreage and occurs throughout the mine area at elevations greater than 7,800 teet. <br />Largest areas occur in the eastern, central. and southern parts of the mine area. <br />Characteristic Toooeraohv -These soils occur on moderately to steeply sloping hill and <br />valley type of topography. Typically they occupy side hi{I locations, but unless bedrock <br />occurs too close to the surface they occur on hill and ridge crests as well. Slopes range <br />from about 3 percent to 60 percent. <br />• Physical Properties -The soils of mapping unit number X3l have for the most pan the <br />same physical properties as the soils of mapping unit number 31. <br />Chemical Properties and Natural Fertility -The soils of mapping unit number X3l have <br />the same chemical properties and natural fertility as the soils of mapping unit number 3l, <br />with the exception of phosphorus deficiency and different laboratory analysis. <br />Mapping Unit Number X32 - Moderately deep (20 to 40 inches to bedrock) and deep <br />(more than 40 inches to bedrock), dark colored, fine to very find textured (35 percent <br />to more than 60 percent clay), immaturely to maturely developed soils usually having <br />continuous horizons of silicate clay accumulation (B2t horizons) but having only darkened <br />surface horizons (A horizons) over clay textured C horizons in places and occurring in <br />parts of the study area where the mean summer soil temperature (June. July. and August <br />mean temperature measured at 20 inches) is less than 59°F. <br />Classification of Major Components -The components listed below comprise the major <br />part of the mapping unit: <br />A. Argic Vertic Cryoborolls (Chemozem). <br />1. Fine, montmorillonitic family. <br />(Cimarron Series) <br />. 2. Very fine. mon[morillonitic family. <br />(Series unidentified) <br />Exhibit ~~-~7 <br />