Jemez Mountains Electric Cooperative gives notice to withdraw from Tri-State membership (Form 8-K)

Jemez Mountains Electric Cooperative gives notice to withdraw from Tri-State membership

(Westminster, Colo., March 20, 2026) Jemez Mountains Electric Cooperative on March 19, 2026, provided not-for-profit wholesale power supply cooperative Tri-State Generation and Transmission Association a non-conditional notice to withdraw from membership in Tri-State, including an early termination of its Wholesale Electric Service Contract (WESC).

The notice includes an Apr. 1, 2028, withdrawal effective date, in accordance with the terms of Tri-State's Contract Termination Payment (CTP) tariff.

Jemez represents approximately 2.9% of Tri-State's utility member revenue and 1.9% of operating revenue for the year ended Dec. 31, 2025.

The CTP tariff on file with the Federal Energy Regulatory Commission (FERC) provides a process should a utility member elect to withdraw from Tri-State membership and terminate its WESC early. This includes requirements for a two-year notice and the payment of a CTP to Tri-State. Each CTP amount will be determined consistent with the FERC tariff and orders, certain elements of which also remain subject to ongoing appeals.

About Tri-State

Tri-State is a wholesale power supply cooperative, operating on a not-for-profit basis, with electric distribution cooperatives and public power district members in four states, including Colorado, Nebraska, New Mexico and Wyoming. Together with its members, Tri-State delivers reliable, affordable and responsible power and energy services to nearly a million electricity consumers across roughly 200,000 square miles of the West.

Contact

Amy Robertson, 303-254-3743, [email protected]

Mark Stutz, 303-254-3183, [email protected]