Proposed revision will enforce stringent emissions limits in 2020 and retire the 427-megawatt Craig Station Unit 1 by Dec. 31, 2025.

Nucla Station to retire by 2022 as part of agreement on proposed revisions to Colorado regional haze plan.

The Wyoming Integrated Test Center (ITC) took another step in efforts to facilitate the next generation of clean carbon technology.

Western Fuels-Colorado has changed its name to Elk Ridge Mining and Reclamation.

Tri-State and Kit Carson Electric Cooperative enter a separation that will serve both cooperatives well.

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.