Press Releases

November 6, 2026

Tri-State CEO Duane Highley to Retire in April 2027 

WESTMINSTER, Colo. (Nov. 6, 2026) – Tri-State Generation and Transmission Association announced today that Chief Executive Officer Duane Highley intends to retire in April 2027 following the association’s 75th Annual Meeting. Highley’s retirement will conclude a career spanning 45 years of service to electric cooperatives, including eight years as CEO of Tri-State. The board will […]

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August 31, 2026

S&P Global Ratings, Fitch and Moody’s affirm Tri-State’s investment grade ratings, stable outlook

Strong results reflect confidence in Tri-State’s formulary rate, last year’s member contract extensions and strong liquidity.

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August 14, 2026

FERC approves Tri-State High-Impact Load Tariff

FERC approves Tri-State’s High-Impact Load Tariff and Agreement (HILT), subject to Tri-State making a compliance filing within 30 days.

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July 13, 2026

Fitch Ratings affirms Tri-State’s outlook, strong investment grade ratings

Review highlights revenue defensibility, contract termination payment certainty and formulary rate benefits.

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May 28, 2026

The Midwest Electric Cooperative Corporation gives notice to withdraw from Tri-State membership

The notice includes a June 1, 2028, withdrawal effective date, in accordance with the terms of Contract Termination Payment (CTP) tariff.

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April 13, 2026

By Design highlights Tri-State’s 74th Annual Meeting

Theme showcased Tri-State’s pursuit of a designed, long-term strategy and corresponding milestones in 2025.

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April 1, 2026

Tri-State highlights benefits of participation in SPP RTO’s western expansion

SPP RTO to provide more efficient planning, more reliable service and lower overall costs.

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