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December 5, 2025

Arizona Public Service (APS)

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.

APS
New APS Gas Plant Will Offer Large-user Subscriptions
Arizona Public Service plans to build an up-to-2-GW natural gas power plant that would be paid for in part by large-load subscribers such as data centers.
© RTO Insider LLC
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.
Shutterstock
West Must Step up Gas-electric Coordination, WECC Panelists Say
Coordination between the gas and electric industries is becoming increasingly crucial to meet demand and to tackle extreme weather events, panelists participating in a WECC webinar argued.
APS
Arizona Renewable Standard on the Chopping Block
Arizona regulators are moving toward a repeal of a renewable energy standard for utilities, saying the mandate has cost ratepayers billions of dollars since it was adopted in 2006.
© RTO Insider
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.
CAISO
WEIM Q2 Benefits Exceed $420M, as Total Tops $7.4B
CAISO’s Western Energy Imbalance Market provided participants with $422.44 million in economic benefits during the second quarter of 2025, up 15% compared with the same period year earlier despite no change in membership. 
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.
WECC
WECC Report Highlights Larger Loads, Longer Emergencies
Peak demand in the Western Interconnection hit a record high of 168.2 GW in 2024, reflecting “early effects” of the growth in large loads such as data centers, according to a new WECC report.

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