Tri-State Generation and Transmission Association, a wholesale power supply cooperative with 45 members in four states—Colorado, Nebraska, New Mexico, and Wyoming—announced its intentions to retire the Rifle Station, an 85-MW combined cycle facility in Rifle, Colorado.

The announcement was made on April 5 in conjunction with a filing with the Colorado Public Utilities Commission (CPUC). If approved, the plant would be closed “on or about Oct. 6, 2022,” Tri-State said.

The Rifle plant runs infrequently, according to the cooperative, because “sufficient and lower-cost resources” are available to serve member power requirements. The station reportedly would need “significant investments” to continue operating.

“The decision to retire Rifle Station comes as we transition to cleaner resources and reduce our wholesale rates,” Tri-State CEO Duane Highley said in a statement. “We appreciate our Rifle employees’ commitment and service through the years, and will be working with them to ease the impact of this transition.”

In January, Tri-State reached an agreement with more than two dozen parties on Phase I of its 2020 Electric Resource Plan (ERP), which was before the CPUC at the time.…

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