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  • https://tristate.coop/sites/tristategt/files/revslider/image/BullElk3_Hero.jpg
    Supporting our mission through Environmental, Social and Governance practices
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    We’re reducing our carbon emissions 80% in Colorado by 2030.
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    Keeping you connected
    to the ones you love
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    Every transformation starts with a plan. Learn more about our responsible energy plan.
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    By 2024, 50% of your electricity will come from renewable sources.
    How we do it
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    Together, we are part of something bigger…a cooperative.
    Learn why

More clean energy. Fewer emissions.Learn how we’re transforming with our Responsible Energy Plan.

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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.

Our culture

S&P Global Ratings changes Tri-State issuer rating, maintains stable outlook

S&P changes Tri-State issuer rating but maintains a stable outlook. Tri-State is focused on long-term, clean energy transition and member flexibility.
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Tri-State expands participation in CAISO Western Energy Imbalance Market

Market benefits include efficiently using the transmission system, better integrating renewable resources and dispatching the lowest cost resources.
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Winter storm has immaterial financial impact on Tri-State; S&P affirms investment grade rating and raises outlook

S&P changes Tri-State issuer rating but maintains a stable outlook. Tri-State is focused on long-term, clean energy transition and member flexibility....
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Earth Day 2021 Energy Saving Tips

Earth Day 2021 Energy Saving Tips

Earth Day is coming up Thursday, April 22nd! Launched in 1970, Earth Day 2021 will mark the 51st anniversary of this holiday. This year’s theme is “Restore Our Earth.”
Matt Fitzgibbon, Beneficial Electrification Manager
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Lineworker, linemen appreciation day 2021

Lineworker Appreciation Day

Lineworker Appreciation Day, April 12th, 2021 - Celebrating the Teams Behind Electricity Transmission
Ruth Marks, Senior Manager Transmission Maintenance
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Second EV Bus Rolls Out from Colorado's West Grand School District

Second EV Bus Rolls Out from Colorado's West Grand School District

A group of West Grand School District (WGSD) seniors had the honor to be the first official riders on the district’s new electric vehicle (EV) school bus during a dedication on March 18th in Kremmling, Colorado. The 78-passenger all-electric bus has a 120-mile range and three times the torque of the diesel bus it replaced.
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5,665 Miles of Line

More than One Million Consumers

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Tri-State Generation & Transmission Association
Office: 303-452-6111
1100 West 116th Avenue
Westminster, CO 80234

Mailing address:
PO Box 33695
Denver, CO 80233-0695

©2021 Tri-State Generation and Transmission Association, Inc. Power supplier to the rural west.

  • About Us
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