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1 <br />Revised 11/04- PR11; 01/06- RN05; 09/07- PR12; 03/11 & 10/11- RN06; 08/13- MR398; 09/14- MR407; 03/15- MR408; 01/16- <br />MR416; 03/17- MR421; 07/18- PR15; 02/19- MR432; 05/20- MR445; 12/21- MR458; 1/26-MR492 <br />EXHIBIT 1 <br />OFFICERS & DIRECTORS <br />CORE NATURAL RESOURCES, LLC <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 RESOURCES, INC.