Arch secured lease rights to approximately 8,300 acres of state-owned minerals in the Otter Creek area in 2010. Since that time, Arch has engaged state regulators through the permitting process in order to obtain the approval to mine.

That process has taken longer than anticipated, and further deterioration in coal markets has led to the decision to suspend the permitting effort, the company said.

“The Powder River Basin remains an important coal supply region for domestic and international power generators,” it said. “However, given current conditions, Arch can no longer devote the time, capital and resources required to develop a coal mine on the Otter Creek reserve block.

“Arch remains committed to navigating a challenging market environment, executing upon its prudent capital allocation strategy and preserving liquidity. This step will allow Arch to further intensify its focus on operating safe, responsible and low-cost mines.”