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Operations at the West Elk Mine (WEM) have been conducted under several different names in <br />the past. Before 1991, the WEM itself was known as the Mt. Gunnison No. 1 Mine. Since the <br />mine opened, operations were conducted under the following names: Anaconda Minerals <br />Company, ARCO Coal Company (a Division of Atlantic Richfield Company), and West Elk <br />Coal Company, Inc. The name was changed from West Elk Coal Company, Inc., Mt. Gunnison <br />No. 1 Mine, to Mountain Coal Company, West Elk Mine, and processed by the Division as a <br />Succession of Operator. Both companies are wholly owned subsidiaries of the Atlantic Richfield <br />Company. The Division issued a proposed decision to approve the name change pursuant to <br />Rule 2.08.6(4) on December 20, 1991. The decision was final following the public comment <br />period, on January 20, 1992. The permit was subsequently transferred by succession of operator <br />to Mountain Coal Co. LLC, a subsidiary of Arch Coal, Inc., on Apri123, 1998. <br />78 <br />