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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.
Office of Gov. Gavin Newsom
Newsom Renews Call for Passage of Pathways Bill

California Gov. Gavin Newsom renewed his call for lawmakers to pass a bill to authorize CAISO to relinquish governance of its electricity markets and allow it and the state’s utilities to participate in a new “regional organization” designed to oversee a West-wide market.

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FERC OKs Imperial Irrigation District’s WEIM Agreement

FERC approved CAISO's Western Energy Imbalance Market implementation agreement with Imperial Irrigation District.

CAISO
EDAM Implementation Team Reveals New Intertie Scheduling Approach

CAISO staff showed how the grid operator plans to implement certain parts of its Extended Day-Ahead Market, with stakeholders asking for more time to comment on what they said crossed into potential policy revisions.

Pattern Energy
WRAP Day-Ahead Market Task Force Moves Forward on Concept Paper
The WRAP DAM Task Force is finalizing a concept paper that outlines proposed principles for the program under the new day-ahead market landscape.
Brattle Group
Budget Cuts Threaten Calif. VPP Program
Clean energy advocates are urging California lawmakers to restore funding to a fast-growing distributed energy program that has shown its ability to support the grid during a test run. 
NorthWestern Energy
Black Hills-NorthWestern Merger Could Reshape Western Market Map

The proposed merger between Black Hills Corp. and NorthWestern Energy likely will reshape the map in the competition between CAISO’s Extended Day-Ahead Market and SPP’s Markets+ — but it’s still too early to know where new boundaries will be drawn.

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State Tx Entity, Regional Markets Feature in Ore. Energy Strategy
The Oregon Department of Energy’s new draft energy strategy points to the importance of new transmission development and expanding electricity markets for meeting the state's energy goals.
BLM California
CAISO Monitor Sees ‘Gaming’ Potential in Battery Storage Bid Cost Recovery

CAISO’s Market Monitor is concerned about potential gaming practices and inefficient bidding behavior in the ISO’s bid cost recovery  process for battery storage resources.

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.
CAISO
Calif. Energy Officials Ponder Interconnection Timelines, Load Uncertainty
California energy officials are recognizing the need to work together to prioritize a long list of transmission and distribution interconnection projects as the state’s load growth accelerates due to expected data center development.

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