Tri-State Generation and Transmission Association, Inc. | 12,415 followers on LinkedIn. More Clean Energy & Fewer Emissions | Cooperative Power⚡Transformed | We are Tri-State, a not-for-profit, wholesale power supplier to electric cooperatives and public power districts across the Western U.S. Together, we power the potential of more than one million energy consumers in Colorado, Nebraska, New Mexico and Wyoming. Reliable power is the lifeblood of the rural West, and critical to the future of our communities.