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EXHIBIT 1 <br />OFFICERS & DIRECTORS <br />MOUNTAIN COAL COMPANY, LLC <br />ARCH WESTERN BITUMINOUS GROUP, LLC <br />ARCH WESTERN RESOURCES, LLC <br />ARCH WESTERN ACQUISITION, LLC <br />ARK LAND LLC <br />ARCH WESTERN ACQUISITION CORPORATION <br />ARCH COAL, INC. <br />Revised 3/17- MR421 <br />