Whatever the future holds, we’ll power it.

Tri-State Generation and Transmission Assoc. is a wholesale power supplier providing for 39 utilities across the rural west.

Discover Our Impact

A not-for-profit electric cooperative

At Tri-State, we’re not just an electric utility, we’re a network. From supporting each other in times of need, to accessing low-cost utility-scale renewables, membership in Tri-State delivers more value today than ever before—and that’s the cooperative difference.

substation on wheels
transmission & substations

Power on standby: The quiet asset protecting co-op members

Most people who pass a mobile substation on the road have no idea what they’re looking at.

Diver Deeper
PODCAST

High voltage, high stakes

Travis breaks down how Tri-State’s transmission line, substation, and telecommunication departments work together across our four states.

Listen
veg management
WILDFIRE MITIGATION

Vegetation management in the Carson National Forest

In the rugged terrain of northern New Mexico, keeping trees away from power lines is a critical part of protecting electric reliability and reducing wildfire risk.

LEARN MORE

Every one of our members has a voice and it’s our job to deliver on their priorities.

The Cooperative Difference
  • 70+

    years in operation. Together with our members, we’ve been serving the rural West since 1952.

  • 1M

    serving nearly one million consumers across four states

  • 6,000

    maintaining nearly 6,000 miles of transmission line to move power

  • 1,000MW

    of new wind and solar resources from 2021 to 2026.

Who we serve

Serving nearly 200,000 square miles of the U.S.

As a wholesale power supplier to our members, of electric utilities across rural Colorado, Nebraska, New Mexico and Wyoming, we have a fleet of electric resources. They include natural gas, wind and solar facilities. We also own and operate nearly 6,000 miles of transmission line to move that power.

Find your local cooperative

Supplying the West with the power they deserve.

  • Reliable

    Backed by 20 years of data, we’ve developed our own set of industry-leading reliability metrics to make sure we can serve members’ power into the future. Tornadoes, heat waves or blizzards, we’re planning for it all.

  • Affordable

    As a not-for-profit, we work hard to keep rates affordable by investing in low-cost renewable power, participating in regional power markets to buy and sell power at the best rates.

  • Responsible

    We are stewards of nearly 200,000 square miles, and we take that seriously. We strive to meet standards set by both the government and our members to protect ecosystems and communities.

  • Flexible

    Tri-State is democratically governed and that’s reflected in our bylaws. Members have the ability to self-supply a portion of their power by developing electric resources.

Learn what it takes to power the West

Our podcast Western Watts dives into the heart of energy issues. From reliability to wildfire mitigation, we’re sharing firsthand insights relevant to rural, agricultural and mountain communities across our service territory.

Listen to episodes

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