| Tri-State, Platte River request rehearing of DOE order delaying retirement of Craig Station Unit 1 |
January 30, 2026 |
| Tri-State makes Craig Generating Station Unit 1 available to operate in compliance with DOE emergency order |
January 23, 2026 |
| FERC accepts settlement on Tri-State’s formulary rates |
January 6, 2026 |
| U.S. DOE orders Tri-State to keep Craig Generating Station unit operating for next 90 days |
December 31, 2025 |
| Colorado PUC issues written order approving Tri-State’s Organized Wholesale Market application |
December 17, 2025 |
| Three Nebraska utilities give notice to withdraw from Tri-State membership |
November 26, 2025 |
| Statement from Tri-State CEO Duane Highley on DOE cancellation for GRIP award |
October 3, 2025 |
| Tri-State’s Board of Directors approves 2026 budget and rate change |
September 10, 2025 |
| Tri-State announces Bryan Davis as Chief Financial Officer |
September 2, 2025 |
| Collaborative work results in FERC filing of Tri-State’s High Impact Load Tariff and Agreement |
August 28, 2025 |
| Colorado Public Utilities Commission approves Tri-State’s 2023 Electric Resource Plan |
August 26, 2025 |
| FERC accepts Tri-State’s new Wholesale Electric Service Contracts and amended board policy expanding member flexibility |
August 21, 2025 |
| Colowyo Mine to conclude coal production in 2025, transitioning to full reclamation |
August 7, 2025 |
| Tri-State addresses EPA proposed action on Colorado State Implementation Plan |
July 28, 2025 |
| Fitch Ratings raises Tri-State’s outlook, affirms investment-grade ratings |
July 23, 2025 |
| Benefits of SPP RTO West participation highlighted in filing with Colorado PUC |
June 17, 2025 |
| Tri-State announces interim CFO |
June 12, 2025 |
| Members, Tri-State execute new, more flexible wholesale electric service contracts |
June 9, 2025 |
| Chief Financial Officer to depart Tri-State |
June 3, 2025 |
| San Miguel Power Association, Tri-State announce additional support and investment in Montrose County |
May 28, 2025 |
| Tri-State members, co-op consumers to benefit from reduced costs, increased reliability through demand response program |
May 23, 2025 |
| Reliable power, lowest-cost and reduced emissions focus of preferred portfolio of Tri-State resource plan filing |
April 10, 2025 |
| Focus on Our Path Forward highlights Tri-State’s 73rd Annual Meeting |
April 3, 2025 |
| Statement from Tri-State CEO Duane Highley on USDA’s releasing of New ERA Funding |
March 26, 2025 |
| SPP first RTO to operate in both interconnections with tariff approval |
March 21, 2025 |
| Tri-State reviews 2024 financial performance |
March 19, 2025 |
| Tri-State energizes Burlington-Lamar transmission line |
February 24, 2025 |
| Tri-State, Mountain Parks Electric terminate wholesale electric service contract |
January 31, 2025 |
| Deriva, Tri-State announce start of commercial operations at Spanish Peaks Solar projects |
January 6, 2025 |
| Northwest Rural Public Power District provides second notice to withdraw from Tri-State membership |
January 2, 2025 |
| Tri-State closes financing for construction of two solar projects |
December 16, 2024 |
| Tri-State returning $10 million in patronage capital to members for 2024 |
December 5, 2024 |
| LPEA and Tri-State execute term sheet paving the way for future collaboration |
November 7, 2024 |
| USDA New ERA award to finance $2.5 billion in Tri-State clean energy investments |
October 25, 2024 |
| Tri-State wholesale rate to members unchanged through 2025 |
September 30, 2024 |
| Tri-State begins process for securing new resources for its members, focused on renewables, storage and dispatchable resources |
September 13, 2024 |
| Rural communities to benefit as Tri-State selected in USDA’s New ERA Program |
September 5, 2024 |
| Colorado regulators approve Tri-State’s transformative, unopposed electric resource plan settlement |
August 23, 2024 |
| Tri-State’s innovative Bring Your Own Resource program accepted by federal regulators |
August 5, 2024 |
| S&P Global Ratings raises Tri-State’s outlook to stable, affirms investment grade ratings |
August 1, 2024 |
| New Tri-State wholesale rate design accepted by federal regulators |
July 30, 2024 |
| Northwest Rural Public Power District refuses to pay wholesale power bill to Tri-State |
July 17, 2024 |
| Tri-State advances transformative electric resource plan with unopposed settlement filing |
June 27, 2024 |
| Tri-State evaluating plans for Colowyo Mine |
June 14, 2024 |
| Origis Energy and Tri-State announce commercial operation of Escalante Solar |
June 11, 2024 |
| Tri-State, members announce innovative Bring Your Own Resource program |
June 7, 2024 |
| SPP files expanded regional transmission organization tariff to include western entities |
June 5, 2024 |
| Tri-State purchases two western Colorado solar projects from JUWI |
June 4, 2024 |
| Tri-State files wholesale rates with the Federal Energy Regulatory Commission |
May 31, 2024 |
| Tri-State, CoBank partner in donation to the Cooperative Family Fund in honor of fallen San Isabel Electric Association lineman |
May 9, 2024 |
| New Electrify and Save On-Bill Repayment Program expands access to beneficial electrification and energy efficiency across the West |
May 3, 2024 |
| Tri-State advances energy transition as it withdraws United Power from membership |
April 30, 2024 |
| Tri-State announces two new senior vice president positions |
April 8, 2024 |
| Momentum of energy transition highlights Tri-State’s 72nd Annual Meeting |
April 5, 2024 |
| Tri-State moving forward with $186.5 million in transmission system upgrades |
April 5, 2024 |
| Regulatory uncertainty drives ratings changes from Moody’s Ratings, Fitch Ratings |
April 3, 2024 |
| Tri-State’s member-led clean energy transition will continue without La Plata Electric Association |
March 25, 2024 |
| Tri-State achieves 2023 energy efficiency targets in Colorado; increases noted in other states |
February 8, 2024 |
| Tri-State announces Todd Telesz as Chief Financial Officer |
January 12, 2024 |
| Tri-State returning $10.37 million in patronage capital to members for 2023 |
December 22, 2023 |
| Federal regulators request additional information on non-networked transmission cost allocation |
December 22, 2023 |
| Tri-State reviewing FERC order on Contract Termination Payment tariff |
December 19, 2023 |
| Tri-State accelerates clean energy transition and bolsters electric system reliability |
November 30, 2023 |
| Tri-State member cooperatives celebrate halfway point of construction for Escalante Solar |
November 10, 2023 |
| Tri-State and United Power execute settlement Term Sheet |
November 8, 2023 |
| Tri-State receives USDA Rural Energy for America’s Technical Assistance Grant |
November 2, 2023 |
| U.S. Department of Energy selects Tri-State for $26.8 million in federal funding to increase power grid resilience and reliability across four western states |
October 18, 2023 |
| SPP RTO will expand with commitments from western utilities |
September 14, 2023 |
| Tri-State submits Letter of Interest to pursue USDA New ERA Program for electric cooperatives |
September 13, 2023 |
| Tri-State issues request for offers from third parties to purchase power |
September 5, 2023 |
| Origis Energy announces construction on 200 MW Escalante Solar |
August 30, 2023 |
| Chief Financial Officer Pat Bridges to retire in March 2024 |
August 29, 2023 |
| FERC issues order providing direction and clarity on Tri-State’s wholesale rates and a long-standing issue regarding battery storage |
August 18, 2023 |
| Tri-State responds to United Power’s critique of judge’s order |
June 13, 2023 |
| Tri-State Board of Directors approves 2024 budget, wholesale rate design |
June 6, 2023 |
| Fitch Ratings action reaffirms Tri-State’s investment-grade financial ratings with a Stable outlook |
May 18, 2023 |
| Tri-State CEO lauds cooperative provisions in Inflation Reduction Act at White House announcement |
May 16, 2023 |
| S&P Global Ratings issues report on Tri-State investment-grade ratings |
April 25, 2023 |
| Tri-State seeks certainty for member contract termination procedures |
April 14, 2023 |
| Resiliency of Tri-State highlighted at 71st Annual Meeting of its membership |
April 7, 2023 |
| Tri-State files revisions to its Contact Termination Payment methodology tariff |
February 14, 2023 |
| Tri-State submits Phase II Electric Resource Plan Implementation Report to CoPUC |
February 13, 2023 |
| Moody’s Investors Service reaffirms Tri-State’s senior secured debt rating, lowers outlook |
January 31, 2023 |
| Members, Tri-State file joint request for rehearing of settlement advancing flexible power contracts |
January 23, 2023 |
| Mountain Parks Electric provides notice to withdraw from Tri-State membership |
January 18, 2023 |
| Tri-State reflects on third anniversary of its transformative Responsible Energy Plan |
January 17, 2023 |
| Tri-State, members will continue to pursue flexible memberships options in FERC hearing process |
December 27, 2022 |
| Tri-State returning $10 million in patronage capital to members for 2022 |
December 15, 2022 |
| Judge issues initial decision in Tri-State Contract Termination Payment Tariff filing |
September 29, 2022 |
| Study on possible Southwest Power Pool RTO expansion shows promise, informs next steps |
September 21, 2022 |
| D.C. Circuit Court of Appeals affirms FERC’s exclusive jurisdiction over Tri-State exit charges |
September 16, 2022 |
| Highline Electric Association adds potential game changer to the EV charging world |
August 30, 2022 |
| Co-op provisions in Inflation Reduction Act of 2022 advance Tri-State Responsible Energy Plan |
August 16, 2022 |
| Tri-State Announces Early Results of Its Cash Tender Offers |
July 27, 2022 |
| Tri-State Announces Pricing Terms of Its Cash Tender Offers for Certain Outstanding Debt Securities |
July 27, 2022 |
| Tri-State reaches unanimous settlement to retire Rifle Station |
July 26, 2022 |
| Tri-State Announces Cash Tender Offers for certain outstanding debt securities |
July 13, 2022 |
| Tri-State Generation and Transmission Association announces strategic reorganization |
June 3, 2022 |
| Ophir vegetation management set to begin around transmission right of way in June |
May 26, 2022 |
| Three additional Tri-State members to pursue partial requirements membership option |
May 23, 2022 |