“This achievement took vigilance and dedication by each employee during every shift,” said Cloud Peak CEO Colin Marshall. “Safety is a core value at Cloud Peak, and we believe there is no reason for anyone to be harmed mining coal.”

Marc Ostrem, director of health, safety and training, echoed the sentiment by noting his company instills the “belief all injuries are preventable; this drives a proactive approach to incidents from the beginning of any task.”

Overall, Cloud Peak Energy has enjoyed a long-standing record of safe production, said the company, having received one of the lowest All Injury Frequency Rates of the top 25 U.S. coal producers in 2012, according to MSHA officials.

In 2012, Spring Creek produced 17.2 million tons of coal, making it Montana’s largest coal mine and the country’s No. 8 coal producer, according to company statistics. Spring Creek coal is shipped primarily to electric utilities and industrial customers in the northwest, midwest, northeast and southwest United States and parts of Canada. The coal is also exported to Asian utility customers via British Columbia.

The Wyoming-based Cloud Peak Energy Inc. is a top U.S. coal producer and the only pure-play Powder River Basin coal company; it also specializes in low sulfur, subbituminous coal production. Cloud Peak owns and operates three surface mines in what is deemed the nation’s lowest cost major coal producing region. With some 1,700 employees, Cloud Peak supplies fuel for 4% of the nation’s electricity, said the company.