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Whatever the future holds
we'll power it

 

More clean energy, fewer emissions

Tri-State Generation and Transmission is a wholesale power supplier based in Westminster, Colorado. We provide electricity for 40 utilities across the rural west. Together, with our members, we keep the lights on for one million energy consumers in Colorado, Nebraska, New Mexico and Wyoming.

As a not-for-profit, we carefully consider how we spend each dollar to operate and maintain a resilient system, keeping dependable energy just a switch away.

Learn how we do it

Our principles guide our work

Responsibility has always been a part of how we approach our business—we’re responsible for more than just providing electricity. We do it with respect for the natural environment and resources we share, the communities we serve, and the employees we support.

Learn more about our Environmental, Social and Governance

 

 

Where we serve

 

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Find your co-op

 

 

By the numbers

70+
years of providing reliable energy
1M+
homes and businesses powered daily
50%
renewable energy by 2025
 

Member-driven,
not profit-driven

At Tri-State, we’re not just an electric utility, we’re a network. As a cooperative, we don’t answer to shareholders, we answer to our neighbors. We work together. From supporting each other in times of need to access to low-cost utility-scale renewables, membership in Tri-State delivers more value today than ever before—and that’s the cooperative difference.

Learn more about the cooperative difference

Electrify and Save

Clean energy can save you money and benefit the environment. Learn how going electric can lower your monthly energy bills, reduce emissions, and improve quality of life.

Electrify your life

 
Hero image: two lineworkers walking on trail, back facing, yellow tractor on left side. Mountains in distance

Four Feet Below: Digging Deep to Mitigate Wildfire Risk

Rather than waiting for disaster to strike, High Plains Power took decisive action—backed by years of wildfire mitigation planning in the Horse Creek area of the Wind River Ranger District. This forward-thinking initiative was made possible through close collaboration with the U.S. Forest Service and local stakeholders, combining expertise, resources, and insight. The result? A project that not only fortifies the region’s electric infrastructure but also protects the livelihoods of those who live, work, and depend on reliable power.
Read more >
Hero image: orange background with white fire pattern in back. Text says: protecting your home from wildfire

Protecting Your Home Year-Round from Wildfires

Wildfires are no longer seasonal—they're a constant concern. While prevention remains critical, homeowners also have the power to safeguard their properties and communities. This blog explores practical steps anyone can take, from grasping the concept of the wildland-urban interface to creating defensible space and reinforcing homes through hardening and retrofitting. With the right knowledge and action, wildfire mitigation becomes a shared responsibility.
Read more >
Hero image: close up of someone with boots on a trail walking away

Summer Backpacking: Solar Power, Energy Efficiency, and the Best States to Visit

Discover how to make your summer backpacking adventures better with solar-powered gear and energy-efficient planning. Explore seven scenic trails across Colorado, Nebraska, New Mexico, and Wyoming, and learn how to pack light and stay safe. From solar chargers to GPS trackers, this guide helps you harness the sun’s energy while enjoying the great outdoors.
Read more >
 

Tri-State’s Board of Directors approves 2026 budget and rate change

Tri-State to make investments in generation and transmission, meet heightened reliability metrics and stringent environmental requirements.
Read more >

Tri-State announces Bryan Davis as Chief Financial Officer

Davis brings 20 years of finance experience, with expertise in accounting, financial planning and utility strategies.
Read more >

Collaborative work results in FERC filing of Tri-State’s High Impact Load Tariff and Agreement

Filing reflects months of effort and collaboration with members and stakeholders.
Read more >

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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

©2025 Tri-State Generation and Transmission Association, Inc. Power supplier to the rural west.

  • About Us
    • Annual Report
  • Powering the Future
    • Our Energy Mix
  • Electrify and Save®
    • On-Bill Repayment
    • Programs
    • Quality Install
  • Media
    • Resources
    • Blog
    • Features
    • News
    • Newsletter
    • Podcast
  • Cooperative Benefits
  • Operations
  • Search