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December 16, 2025

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.
Western Power Pool
WPP Board Approves WRAP Transition Plan Changes
The Western Power Pool’s Board of Directors has approved changes to the Western Resource Adequacy Program’s transition plan that include postponing the program’s “binding” phase by one year and reducing penalties for participants who come up short on RA.
CAISO
CAISO, Stakeholders Consider GHG Attribution for Non-priced States
CAISO is recommending it implement a Western Power Trading Forum proposal that could help the EDAM track and account for GHG emissions in a way that considers the variety of carbon pricing programs across the West.
PacifiCorp
WestTEC Seeks to Close $2.1M Funding Gap Despite DOE Boost
The Western Transmission Expansion Coalition’s transmission planning study is getting a boost from a $1.75 million Department of Energy grant, even as the cost of the project has grown to $6.1 million.
Idaho Power
4 Utilities Nearly Compliant on Order 2023 Rule Changes
FERC largely approved Order 2023 compliance filings for four utilities in the West and Texas, directing them to submit further compliance filings within 60 days.
CAISO
July Sees New Western Peak Despite Moderate CAISO Demand
The Western Interconnection reached a record-breaking peak load July 10 despite relatively moderate demand in CAISO, the ISO said during a meeting of its Market Performance and Planning Forum.
© RTO Insider LLC
WECC, Members Grapple with Strategic Vision
A proposed update to WECC’s long-term strategy has sparked a debate over whether the organization should describe itself as “The Voice of Reliability in the West.”
The Brattle Group
Markets+ ‘Equitable’ Solution to Seams Issues, Backers Say
Proponents of SPP’s Markets+ contend in their latest “issue alert” that the framework provides a much more equitable solution to tackling market seams than under CAISO’s EDAM.
© RTO Insider LLC
New Western Tx Could Bring Big CO2 Benefits, Study Shows
CO2 emissions from the Western U.S. power sector could drop by 73% from 2005 levels if 12 transmission projects in the development pipeline are finished by 2030, according to a new PNNL study.
CAISO
CAISO Backtracks on Proposal to Refine Battery BCR
CAISO is reconsidering its proposal to address unwarranted bid cost recovery payments for storage resources following internal analysis that suggested the proposed solution wouldn’t sufficiently address the problem.
Electricity Canada
Consumer Response Saved Alberta Grid During Jan. 2024 Cold Snap
An emergency alert urging the public to conserve energy helped the Alberta Electric System Operator narrowly avert rolling blackouts during January’s extreme cold snap.

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