September 14, 2015
Signal Peak Energy LLC has asked a federal court to drop a challenge to the underground expansion of a Montana coal mine, saying that a more extensive environmental review of the project isn't necessary.
May 15, 2014
A Montana ranching group upset at Signal Peak Energy LLC's plans to expand an underground coal mine sued the U.S. Department of the Interior on Wednesday, saying its decision to green-light the project failed to account for the large fissures that will open up on surface land.