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Empowering The Rural West

Democratic Member Control

These founding principals still hold true today, over 70 years later. Our members chose to band together to bring electricity to rural areas where there was no financial incentive for large investor-owned utilities to build. They all pitched in to pay for infrastructure across rugged terrain and share risks that no rural electric utility could bear on its own. There are numerous reasons the cooperative G&T model lives on today.

Colorado
Nebraska
New Mexico
Wyoming
70+ YEARS

Generating reliable energy since 1952

$10 M

Patronage capital returned to members in 2022

+500MW

Solar being added to our system by 2025

Reliable, Affordable, Responsible Energy

That was the thought behind Tri-State Generation and Transmission when we were formed more than 70 years ago, and that remains the idea today. Our members chose to band together to bring electricity to rural areas where there was no financial incentive for large investor-owned utilities to build. They all pitched in to pay for infrastructure across rugged terrain and share risks that no rural electric utility could bear on its own. There are numerous reasons the cooperative G&T model lives on today.

Responsible Energy Plan
Annual Report
ESG Report
Cooperative Difference
Electrify and Save
About Us

Our Members

We are a cooperative of 45 members, including 42 electric distribution cooperatives and public power districts in four states that together provide power to more than a million electricity consumers across nearly 200,000 square miles of the West. Our footprint is 20% larger than the state of California.

U.S. map with Tri-State member territories shaded blue

U.S. Department of Energy selects Tri-State for $26.8 million in federal funding to increase power grid resilience and reliability across four western states

Funding accelerates grid optimization between Tri-State and its members
Read more >

Tri-State submits Letter of Interest to pursue USDA New ERA Program for electric cooperatives

Award would deliver significant greenhouse gas emissions reductions, reliability and affordability benefits to membership.
Read more >

Origis Energy announces construction on 200 MW Escalante Solar

The New Mexico-located project is a major step in implementing Tri-State's Responsible Energy Plan to advance clean energy.
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