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December 5, 2025

Tucson Electric Power (TEP)

ACC
TEP Wins Approval for Data Center Energy Supply Agreement
Arizona regulators approved a 286-MW energy supply agreement between Tucson Electric Power and the developer of an embattled data center project near Tucson.
Seattle City Light
WRAP Wins Commitments from 16 Entities

Sixteen entities have committed to participating in the Western Resource Adequacy Program’s first financially “binding” season covering winter 2027/28, the Western Power Pool said.

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WRAP ‘Binding’ Phase Set for Winter 2027/28 After Utilities Affirm Commitment
The Western Power Pool’s WRAP secured enough participants for the program to enter the first binding phase after 11 utilities reaffirmed their commitment.
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SPP, Stakeholders Kick off Markets+ Phase 2 Development
The development of SPP's Markets+ has picked up the pace with stakeholders agreeing on an interim governance structure and representation on the working groups that will handle much of the effort ahead.
WRA
WRA Data Center Report Proposes Mandatory Clean Transition Tariffs
With data centers contributing to surging load growth, a new report suggests that more Western utilities should adopt clean transition tariffs or even make the tariffs mandatory for certain large customers.
SPP
SPP Launches Markets+ Phase 2 With $150M Secured
SPP secured $150 million in financing and entered the second phase of development for its day-ahead market Markets+, the grid operator announced.
Arizona Public Service
Arizona Utilities Explore Expanded Use of Nuclear

Arizona utilities are seeking U.S. Department of Energy funding to help plan for additional nuclear power facilities in the state.

Center for Land Use Interpretation
APS to Keep Cholla Plant Closed Despite Trump Order Backing Coal
APS officials said they are looking to a non-coal future for the recently closed Cholla coal-fired power plant, despite President Donald Trump’s calls to keep the facility running.
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SPP MPEC Members Celebrate Markets+ Funding Order
FERC’s approval of SPP’s Markets+ funding agreement and its recovery mechanism came as backers of the Western centralized day-ahead market were meeting with the snow-capped Rockies as a backdrop.
Pattern Energy
SunZia Gets Mixed Decision on Tariff
FERC approved the non-rate terms of SunZia Transmission’s proposed transmission owner tariff but sent the tariff’s non-subscriber usage rate to a settlement process and potential hearing.

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