Tri-State Generation and Transmission Association

Tri-State is a wholesale power supply cooperative, operating on a not-for-profit basis, with 44 members, including 41 utility electric distribution cooperative and public power district members in four states: Colorado, Nebraska, New Mexico and Wyoming. Together with its members, Tri-State delivers reliable, affordable and responsible power and energy services to more than a million electricity consumers across nearly 200,000 square miles of the West. Tri-State was founded in 1952 by its member systems to provide a reliable, cost-based supply of electricity. Headquartered in Westminster, Colo., approximately 1,200 people are employed by Tri-State across five states. Tri-State's electricity is generated from coal, natural gas and hydropower, with a rapidly increasing supply generated from wind and solar. Tri-State delivers power to its members through a transmission system that includes substation facilities, telecommunications sites and over 5,700 miles of high voltage transmission lines. Tri-State's transformative Responsible Energy Plan is reducing emissions, increasing renewable resources, developing new energy services and delivering more flexibility for its members. View More