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December 5, 2025

Southwest Power Pool (SPP)

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SPP Board Approves 765-kV Project’s Increased Cost
SPP’s Board of Directors has approved a pair of contentious measures that were put aside during its August quarterly meeting, a tariff change to integrate and operate high-impact large loads and a revised cost estimate for a 765-kV transmission project.
SPP
SPP, Members Developing 765-kV Transmission Overlay Plan
SPP and its members are working together on a draft 765-kV transmission overlay as part of its 2025 Integrated Transmission Planning assessment that will dwarf 2024's record study.
Shutterstock
CAISO’s EDAM Scores Simultaneous Wins at FERC

CAISO’s EDAM clinched a set of wins when FERC approved the market’s revised congestion revenue allocation model and authorized participation for the EDAM’s first two members — PacifiCorp and Portland General Electric.

SPP MMU
SPP MMU: Average WEIS Energy Prices Up in Spring
SPP’s Market Monitoring Unit says in its latest report that the Western Energy Imbalance Service market’s average load energy prices rose “significantly” during the spring quarter of 2025.
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Hepper Replaces Cupparo as SPP Board Chair
Vice Chair Ray Hepper has been serving as the SPP Board of Directors' chair in place of John Cupparo, who is stepping away from the position's time requirements.
SPP
SPP MOPC Passes Revised Large Load Policy
SPP stakeholders have approved a revised version of the grid operator’s fast-track study to integrate high-impact large loads during a special virtual meeting of the Markets and Operations Policy Committee.
SPP
FERC Approves SPP’s Separate Winter, Summer PRMs
FERC has approved SPP’s tariff revision that establishes separate planning reserve margins for the summer and winter seasons, saying it will provide “more granularity” by recognizing the reliability differences between the two seasons.
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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.
Aurora Energy Research
Report Urges 5-GW Battery Storage Buildout in SPP
A new report urges SPP to accelerate its interconnection process and reform market rules to allow greater buildout of energy storage.
DOE
BPA Supported by Trade Orgs in Suit over Day-ahead Market Decision
Trade organizations for utilities and large energy consumers seek to intervene in the lawsuit filed in the 9th Circuit Court of Appeals challenging the Bonneville Power Administration’s decision to join SPP’s Markets+ instead of CAISO’s EDAM.

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