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 42 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.
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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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.
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.
Colorado Ranch Restores their Land Through Regenerative Ranching
In 1961, Dave and Kay James left California to live in Colorado and raise their children. They never could have guessed the impact James Ranch would have more than 60 years later.
LPEA Expands Equitable Access to Electrification Programs
As the beneficial electrification (BE) movement grows, no one should be left behind. La Plata Electric Association (LPEA) is taking action to ensure its consumers have the support they need to make the switch to BE. Their latest project involves Animas View Mobile Home Park, a member-owned residential community in Durango, Colorado.
The Benefits of Heat Pumps in Cold Climates
Many people are still learning about the benefits of heat pumps and what they can do. Heat pumps are especially beneficial in cold weather climates. A heat pump is part of a home heating and cooling system and is installed outside the home. Here are five main types of heat pumps