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.
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.
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.
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.
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.
March 31, 2026
Tri-State, La Plata Electric Association terminate wholesale electric service contract
LPEA provided an unconditional notice to leave Tri-State in late March 2024.
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