Cloud Peak Energy has single fatality at Spring Creek Mine

— June 24, 2014

(Press Release) — Wyoming-based Cloud Peak Energy confirms a fatality at its Spring Creek Mine in Montana at approximately 7:00 p.m. local time on June 23, 2014 in a single haul truck incident. There are no other injuries to report. Next of kin has been notified.

“Our thoughts and prayers are with the family, co-workers and friends,” said Colin Marshall, Cloud Peak Energy President and CEO.

The Mine Safety and Health Administration (MSHA) and Big Horn County Sheriff have been notified and are on site. The cause of the incident is being investigated.

Cloud Peak Energy will provide updated information via press releases on its website at www.cloudpeakenergy.com as it becomes available.

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 (PRB) 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.