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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

NMSU Center of Excellence, Tri-State, EPRI bring container farm to Grants campus

Partnering with NM State University to join the Electric Power Research Institute’s National Demonstration & Monitoring of Indoor Food Production.
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Southwest Power Pool expands offerings to western utilities with launch of new electricity market

Tri-State expects to lower costs and increase renewable energy integration in market with other regional power suppliers.
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Tri-State notes year anniversary, achievements of Responsible Energy Plan

Tri-State reflects achievements in 2020 and its upcoming efforts for 2021 and beyond at the one-year anniversary of its Responsible Energy Plan (REP).
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Our members

Working here

Annual report

Electric Trucks for The Rocky Mountains

Electric Trucks May Be the Future for The Rockies

As electric vehicles (EV) are expanding into the mainstream, so too are the choices for new electric models including electric trucks.  And while there aren’t any on the road right now, several manufacturers expect to be selling these as early as 2021. 
Mike Frailey, Relationship Manager 
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Winter Storm Readiness Ensure Reliable Power

Winter Storm Readiness to Ensure Reliable Power

Keeping energy flowing to your home and business is a 24/7 job. Tri-State works closely with its 42 member electric co-ops and public power districts to deliver electricity to more than one million consumers across four states.
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MCREA Employees Rally Community Support for Teen with Brain Tumor

MCREA Employees Rally Community Support for Teen with Brain Tumor

The medical and emotional support at Children’s Hospital Colorado gives hope to 13-year-old Ben Mettlen and his family
Read more >

45 Members

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
  • Responsible Energy Plan
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    • News
  • Renewable Energy
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