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  • https://tristate.coop/sites/default/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

Tri-State Announces Pricing Terms of Its Cash Tender Offers for Certain Outstanding Debt Securities

Pricing terms noted on previously announced cash tender offers.
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Tri-State Announces Early Results of Its Cash Tender Offers

Cooperative wholesale energy provider notes early results from its July 13 cash tender offer for certain outstanding debt securities.
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Tri-State reaches unanimous settlement to retire Rifle Station

Parties to the settlement agree to plan that, if approved by the Colorado PUC, would close the facility on or about Oct. 6, 2022.
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The Future of Electric vehicles EVs Air, Water, and Land

The Future of EVs: Air, Water, and Land

When it comes to the future of electric vehicles, the sky’s the limit – quite literally. In addition to continued innovation in land-based electric vehicles, we are also seeing an increase in interest and investment in air and water-based options. Here’s a look at some of the most exciting developments in each EV category.
Mike Frailey, Relationship Manager 
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Benefits of Installing an Attic Fan for Summer

Benefits of Installing an Attic Fan for Summer

If you're considering installing an attic fan but aren't sure if it would be a good fit for your house, here are a few points to consider about attic fans, how they function, and how installing one can improve the energy efficiency of your home.
Matt Fitzgibbon, Beneficial Electrification Manager
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How to Prepare Your Home for a Summer Heat Wave

How to Prepare Your Home for a Summer Heat Wave

During summer heat waves, air conditioning can be a real lifesaver.  Many homes in cooler climate states aren’t always equipped with air conditioning, so when an unexpected heat wave hits, many residents rely on other ways to stay cool without AC. No matter where you live, it’s important to be prepared for hot summer days with efficient cooling and a plan in place to stay comfortable.
Matt Fitzgibbon, Beneficial Electrification Manager
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Tri-State Generation and Transmission Association
Office: 303-452-6111
1100 West 116th Avenue
Westminster, CO 80234

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

©2022 Tri-State Generation and Transmission Association, Inc. Power supplier to the rural west.

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