Tri-State submitted comments about coal leases on federal lands to the Bureau of Land Management during the May 19, 2016 meeting.

Tri-State's 2016 Annual Meeting featured Wyoming Governor Matt Mead, who discussed the regulatory challenges for coal-based electricity.

On Feb. 9, 2016, the U.S. Supreme Court granted the applications of numerous parties, including Tri-State, to stay EPA's Clean Power Plan.

Draft environmental assessment for the Collom Area Development Project at Colowyo Mine available for public comment on Jan. 19.