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December 5, 2025

California Independent System Operator (CAISO)

CAISO
CAISO Approves $4.8B Transmission Plan to Support 76 GW of New Capacity
CAISO's Board of Governors approved the ISO's 2024/25 transmission plan to build out 31 new projects in the region over the next eight to 10 years.
CAISO
CAISO Postpones EDAM Congestion Revenue Decision
CAISO delayed its final decision on how to allocate congestion revenues in its Extended Day-Ahead Market after receiving comments from stakeholders asking for more analysis.
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Turlock Irrigation District to Join EDAM in 2027

California-based Turlock Irrigation District has agreed to join CAISO’s Extended Day-Ahead Market in 2027.

CAISO
CAISO Chooses Viridon to Develop Humboldt OSW Transmission Projects
CAISO selected Viridon, a power infrastructure development firm, to finance, build and operate new transmission lines and infrastructure in Humboldt County for planned offshore wind development.
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CAISO, PacifiCorp, PSCo All Close on Order 2023 Compliance

FERC partially approved three entities' Order 2023 compliance filings, directing them to address mostly minor — but a few substantive — issues in their submissions.

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Debate Lingers After BPA Day-ahead Market Decision
Though BPA removed any uncertainty by selecting SPP’s Markets+ over CAISO’s EDAM, the debate over whether BPA made the right choice likely will heat up as the West confronts a split into two major markets.
CAISO
CAISO Foresees Sufficient Resources for Normal Summer Conditions
California expects to meet its peak demand this summer under most weather conditions due to thousands of megawatts of new energy resources — almost all battery storage.
TransWest Express
Construction Begins on Utah Portion of TransWest Express Line

Construction began on the Utah terminal of the 732-mile TransWest Express transmission line, a project designed to carry Wyoming wind energy to the Southwest.

Shutterstock
Puget Sound Energy Inks Agreement to Join Markets+

Puget Sound Energy said it is joining Markets+, marking another win for SPP shortly after the Bonneville Power Administration issued its final market policy in favor of the day-ahead market.

CPUC
California Will Rely Heavily on Batteries to Meet Summer 2025 Peaks
California's grid is expected to meet peak demand this summer, with officials pointing to the massive growth in solar and storage resources as key.

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