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  • https://www.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 Generation and Transmission Association announces strategic reorganization

New structure aligns Tri-State with industry best practices, continues to ensure reliable and affordable power for members.
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Ophir vegetation management set to begin around transmission right of way in June

Vegetation management is a key element of keeping our power reliable. Crews are working on phase one of the project June-July of 2022.
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Three additional Tri-State members to pursue partial requirements membership option

A totals of six utility members now have been allocated an aggregate of 300 megawatts (MW) for self-supply, which could include renewables.
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Our members

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Annual report

How to Electrify Your Outdoor Camping Adventures

How to Electrify Your Outdoor Camping Adventures

If you’re heading off the grid for an outdoor adventure this summer you’re likely hoping to unplug and relax in nature. You may not be looking for ways to stay plugged in, but would you consider a few ways to power up your campsite in an easy, convenient way? If the answer is yes, keep reading.
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Tips for Installing an EV Charging Station at Home

Tips for Installing an EV Charging Station at Home

Electric vehicles (EVs) are the future, there’s no doubt about it. It’s estimated that more than 2.5 million EVs have been sold in the United States and it’s easy to understand why; they cost less to operate, require less maintenance, don’t need gas, they’re better for the environment and they’re fun to drive! If you’ve adopted the EV lifestyle or are considering it, keep reading for tips to help you install your own home charging station.
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Summer Storm Safety Tips for Camping

Summer Storm Safety Tips for Camping

If you’ve spent some time on the plains or in the mountains across the West, where electric cooperatives serve, you know all about spring and summer storms. Especially noteworthy are the intense storms that begin in March and can last into May. For those who enjoy outdoor activities during this season, it is especially important to be aware of the dangers and take precautions while camping.
Kent Mahanna, MPH, CSP Senior Manager Safety & Security
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5,793 Miles of Line

More than One Million Consumers

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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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