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March 10, 2026

CAISO/WEIM

The California Independent System Operator serves about 80% of California's electricity demand, including the service areas of the state's three investor-owned utilities. It also operates the Western Energy Imbalance Market, an interstate real-time market covering territory that accounts for 80% of the load in the Western Interconnection.
CAISO
Western EIM Nears $2B in Total Benefits
CAISO's Western Energy Imbalance Market hit a record $739 million in member benefits in 2021, putting its total close to $2 billion since it launched in 2014.
Jaywm, CC BY-SA 4.0, via Wikimedia Commons
Avista, Tacoma Power Stick with March Entry into WEIM
Washington utilities Avista and Tacoma Power will not delay their entry into the Western EIM, despite BPA’s decision to postpone joining by two months.
CAISO
CAISO Sees $30B Need for Transmission Development
CAISO's new 20-year transmission outlook projects a need for $30.5 billion in new lines to carry renewable and stored power across California and the West.
WECC
New Tech Needed for 100% Clean Energy, WECC Says
A WECC study found that the West needs emerging technologies capable of replicating the performance of gas plants to reach 100% clean energy by 2040.
DOE
BPA Postpones Western EIM Entry by 2 Months
The Bonneville Power Administration said it will delay its entry into the Western EIM by two months to work out technical and training issues.
Palm Springs Nissan
Calif. EV Incentive Comes with Tax Bill, Some Residents Find
Low-income residents in certain parts of California are finding their EV incentives are accompanied by a tax liability.
National Forest Service
PG&E Ends Probation as a ‘Menace to California,’ Judge Says
PG&E ended five years of probation, but the judge in charge of the case said the utility remains a danger to Californians in high fire-threat areas.
Wines of Washington State
Dueling Bills Have Different Takes on Wash. Siting Council
Two Washington bills seek opposite outcomes for the state’s Energy Facility Site Evaluation Council.
Shutterstock
San Francisco Wins Against FERC, PG&E in DC Circuit
The D.C. Circuit overruled FERC in cases brought by San Francisco against the commission and PG&E, which the city said refused to provide required service.
©RTO Insider LLC
CAISO Extends Wheel-through Rules
CAISO's Board of Governors extended controversial wheel-through restrictions for two more years as the ISO works on a long-term fix to transmission constraints.

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