Our cooperative approach to a clean grid starts now. Learn how we’re transforming with our Responsible Energy Plan.

Tri-State's mission is to provide our member systems a reliable, affordable and responsible supply of electricity in accordance with cooperative principles.

Being a cooperative is more than just our business model. It’s how we approach working together. We share knowledge, listen, collaborate and solve problems together.

Tri-State wholesale rate to remain unchanged for third consecutive year

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...
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Three regional utilities announce decision to join Southwest Power Pool market

Basin Electric Power Cooperative, Tri-State Generation and Transmission Association, and the Western Area Power Administration (WAPA) announced Sept. ...
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Tri-State adds MIECO as new cooperative member

Tri-State Generation and Transmission Association today announced the addition of MIECO Inc., as its first new, non-utility member. The addition of MI...
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1,500 EMPLOYEES

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43 MEMBERS

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5,665 MILES OF LINE

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1.3 MILLION CONSUMERS