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.
Rethinking the American Dream in Colorado’s Mountain Towns
Located about five hours away in Buena Vista, Colorado, served by Tri-State member Sangre de Cristo Electric Association, real estate developer Fading West is finding solutions to meet the needs of affordable housing for essential workers in the community.
Learning Together Throughout the Years: 2023 Communications and Energy Services Conference
Last week, cooperative colleagues joined Tri-State Generation and Transmission Association at the annual 2023 Communications and Energy Services Conference in Westminster, Colorado. Tri-State has hosted the event for over two decades, bringing together 42 members and key partners from across 200,000 square miles of the West. The theme of “Co-op Campus” this year provides opportunities for members to learn from each other.
Communities Win with Rebates: Two Business Owners Make Rebates Work for Them
Cooperatives like Big Horn are always looking for ways to better serve their member-owners. One way of doing that is by offering rebates for energy-efficient home and business upgrades.