Green Tech Co-op Utility Lighting Way to a Carbon-Free Future – GWC Mag gwcmagFebruary 25, 2024055 views A Western rural electric cooperative is shining a light into the future of the utility industry and how it will tackle climate change. Tri-State Generation and Transmission Association, headquartered in Westminster, Colorado, a wholesale power supplier to 42 member co-ops in four states, has filed a visionary Electric Resource Plan as required by Colorado law. It is a document..