Tri-State’s ratings remain classified as investment grade, and Tri-State maintains its strong financial position.

Tri-State board of directors approves community solar program recommended by membership’s Contract Committee.

Members are currently evaluating their wholesale power contracts to increase flexibility, including a proposal from United Power.

Tri-State Generation and Transmission Association CEO Duane Highley's statement on the La Plata Electric Association (LPEA) filing.

“Beneficial Electrification is one of the central commitments of our Responsible Energy Plan at Tri-State.” said Duane Highley, Tri-State’s CEO.

The Nucla Station officially retired from service as a coal plant today, the cooperative announced. The end of generation occurred as the facility exh...

For the third year in a row, Tri-State Generation and Transmission Association announced that wholesale rates for its 43 member systems will not incre...

Basin Electric Power Cooperative, Tri-State Generation and Transmission Association, and the Western Area Power Administration (WAPA) announced Sept. ...

Tri-State Generation and Transmission Association today announced the addition of MIECO Inc., as its first new, non-utility member. The addition of MI...