Cloud Peak Energy’s Antelope Mine, located near Douglas, Wyoming, received the prestigious 2013 State of Wyoming Reclamation Award from the Wyoming Department of Environmental Quality, Land Quality Division. The award was presented at the Wyoming Mining Association’s Annual Safety and Reclamation Banquet in Sheridan, Wyoming, on June 21, 2013. This reclamation award was received for the sustainable control of cheatgrass. Through innovative husbandry practices and custom seeding techniques, Antelope Mine has effectively restored reclamation areas dominated by cheatgrass to native cool and warm season plant communities. This technology is applicable to both reclaimed and native lands. Antelope Mine has successfully transformed over 400 acres of cheatgrass-dominated lands into sustainable native perennial stands that achieve the post-mining land use goal of providing for livestock grazing and wildlife use. Cheatgrass is an undesirable introduced species that readily invades disturbed landscapes in reclamation and native rangeland. These reclamation efforts demonstrate Cloud Peak Energy’s commitment to environmental stewardship. Colin Marshall, President and CEO of Cloud Peak Energy, noted: “The company is honored to receive this award and appreciates the recognition it receives for innovative reclamation techniques.” About Cloud Peak Energy ® Cloud Peak Energy Inc. (NYSE:CLD) is headquartered in Wyoming and is one of the largest U.S. coal producers and the only pure-play PRB coal company. As one of the safest coal producers in the nation, Cloud Peak Energy specializes in the production of low sulfur, subbituminous coal. The company owns and operates three surface coal mines in the PRB, the lowest cost major coal producing region in the nation. The Antelope and Cordero Rojo mines are located in Wyoming and the Spring Creek mine is located near Decker, Montana. Cloud Peak Energy also owns rights to substantial undeveloped coal and complementary surface assets in the Northern PRB, further building the company’s long-term position to serve Asian export and domestic customers. With approximately 1,700 employees, the company is widely recognized for its exemplary performance in its safety and environmental programs. Cloud Peak Energy is a sustainable fuel supplier for approximately 4% of the nation’s electricity.