Tri-State expects to lower costs and increase renewable energy integration in market with other regional power suppliers.

Tri-State reflects achievements in 2020 and its upcoming efforts for 2021 and beyond at the one-year anniversary of its Responsible Energy Plan (REP).

Tri-State announces contributions of $5 million to four organizations supporting communities affected by the retirement of Escalante Station.

The $30,000 Tri-State donation helps support six fire departments who battled the Mullen Fire in southeast Wyoming which consumed over 176,000 acres.

Tri-State CEO Duane Highley commented on the reopening of the record by Colorado Air Quality Control Commission (AQCC).

In showing the benefits of cooperative membership, Tri-State’s board approved the return of $30 million in patronage capital for 2020 to it's members.

Tri-State files its first Electric Resource Plan with Colorado Public Utilities Commission under new rules with their “preferred scenario.”

On Dec. 1, Tri-State will submit an electric resource plan to Colorado Public Utilities Commission that includes an 80% reduction in greenhouse emissi...

Tri-State’s participation in a Western Interconnect RTO is essential to advance our members’ reliability, affordability and clean energy goals.