March 25, 2025

Western Energy Imbalance Market (WEIM)

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Pathways Initiative Receives Praise, Skepticism at Calif. Hearing
California senators heard arguments for and against the West-Wide Governance Pathways Initiative, with some lawmakers voicing concerns about guardrails against market manipulation and what the effort means for the state's autonomy to set its own policies.
Seattle City Light
Seattle City Light, Others Urge BPA to Pause Day-ahead Decision
The Bonneville Power Administration should remain in CAISO’s WEIM and hold off on joining a day-ahead market, Seattle City Light and other Northwest parties urged in a letter sent to BPA CEO John Hairston.
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Feds Pause $1M Pathways Initiative Funding, Group Leader Says
The federal government has put on hold nearly $1 million in funding toward the development of a new independent Western RO to oversee CAISO’s WEIM and EDAM, the West-Wide Governance Pathways Initiative’s Launch Committee said.
CAISO
WEIM Q4 Benefits Exceed $374M
CAISO's Western Energy Imbalance Market provided participants $374.25 million in benefits during the fourth quarter of 2024, down about 4% from the same period a year earlier, according to an ISO report.
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FERC Approves CAISO Energy Storage Bid Cost Recovery Changes
FERC approved CAISO’s tariff revisions related to real-time bid cost recovery rules for energy storage resources.
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BPA Not Planning Any Major Resource Acquisitions
BPA is not planning to acquire any major energy resources but is taking steps to ensure it’s ready in case those predictions should change, staff said during a presentation of the agency’s 2024 Resource Program.
California Natural Resources Agency
CEC Workshop to Focus on Impact of Pathways Initiative
The California Energy Commission will hold a workshop to discuss the West-Wide Governance Pathways Initiative, signaling the state may consider a proposal to alter CAISO’s governance structure to accommodate broader concerns about the ISO’s lack of independence from politics.
CAISO
WEIM Q3 Prices Down Despite Increased Loads, CAISO DMM Finds
Prices in CAISO’s WEIM fell sharply in the third quarter of 2024 compared with a year earlier as declining gas costs outweighed the impact of increased summer loads, the DMM found.
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Benefits of Fast-start Pricing Questionable, CAISO DMM Says
Establishing a fast-start pricing mechanism in CAISO and the WEIM is complex and brings few benefits compared to other potential market enhancements, the ISO's Department of Market Monitoring said.
Bonneville Power Administration
In Letter to Senators, BPA Tempers Markets+ Leaning
The Bonneville Power Administration tamped down expectations that it is all in on SPP’s Markets+, clarifying in a recent letter to lawmakers representing Oregon and Washington that it’s still weighing the pros and cons of joining a day-ahead market.

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