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March 13, 2026

Tucson Electric Power (TEP)

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.
© RTO Insider
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.
U.S. Army Corps of Engineers
BPA Markets+ Phase 2 Bill Could Reach $27M — or More

BPA will be on the hook for nearly $27 million in funding for the next phase of SPP’s Markets+ — and potentially more depending on the market’s final footprint, according to a document SPP filed with FERC.

© RTO Insider LLC
SPP Secures Funding to Begin Markets+ Phase 2
The RTO said it has received signed Phase 2 funding agreements from eight interested participants in its proposed day-ahead service offering — including the Bonneville Power Administration.
© RTO Insider LLC
SPP Sets Deadline for Markets+ Funding Agreements

Financial backers of Phase 2 of SPP’s Markets+ have until Feb. 14 to submit executed funding agreements, the RTO said.

Shutterstock
Arizona Electric Utilities Team Up to Pursue Nuclear
Arizona Public Service, Salt River Project and Tucson Electric Power announced they are jointly exploring the possibility of adding nuclear generation. 

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