Cloud Peak Energy announced today that the company’s Cordero Rojo Mine, located in northeastern Wyoming, received the Governor’s Summit Safety Award in the Large Mine Category presented by the Wyoming Department of Workforce Services, Mines Inspection and Safety Division. Through the end of 2013, Cordero Rojo Mine went 477 days without a lost-time injury and more than two-million employee and contractor hours without a lost-time injury.

“I want to congratulate all those at Cordero Rojo Mine on their continued commitment to safety, which this award reflects,” said Colin Marshall, Cloud Peak Energy’s President and CEO. “Cloud Peak Energy’s value of safety is an underlying principle that always guides our operations.”

“I am proud of our Cordero Rojo employees and contractors,” said Joe Vaccari, Cordero Rojo Mine General Manager. “Together we have maintained a safety focus allowing us to qualify for an award like this. We will continue to be focused on performing our jobs safely and going home to our families safely at the end of each and every shift.”

In 2013, Cordero Rojo sold approximately 36.7 million tons of coal, making it the third largest coal mine in the U.S. last year. Coal mined from Cordero Rojo is primarily shipped to electric utilities in the western, midwestern and southeastern United States. The mine has been recognized for its accomplishments for both safety and environmental stewardship.

Cloud Peak Energy has a long-standing record of safe, responsible coal production. Last year, the company had one of the lowest All Injury Frequency Rates of the top-25 U.S. coal producers, according to MSHA.

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 Powder River Basin coal company. As one of the safest coal producers in the nation, Cloud Peak Energy mines low sulfur, subbituminous coal and provides logistics supply services. 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 in Montana. In 2013, Cloud Peak Energy shipped 86.0 million tons from its three mines to customers located throughout the U.S. and around the world. Cloud Peak Energy also owns rights to substantial undeveloped coal and complimentary 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 total 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 percent of the nation’s electricity.