Western Energy Imbalance Market (WEIM)
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The West-Wide Governance Pathways Initiative’s Launch Committee estimates it will cost about $7.1 million to launch the independent regional organization that eventually will oversee energy markets in the West.
The Imperial Irrigation District
CAISO said the Imperial Irrigation District has signed implementation agreements and will begin participating in the WEIM and EDAM in 2028.
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California-based Turlock Irrigation District has agreed to join CAISO’s Extended Day-Ahead Market in 2027.
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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.
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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.
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New amendments to the proposed Pathways bill would include protections against possible attempts by President Donald Trump to influence California energy markets, such as pushing the state to buy coal-fired generation.
CAISO
CAISO's Department of Market Monitoring found lower natural gas prices helped drive down energy prices in the WEIM in the fourth quarter of 2024.
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For the Balancing Authority of Northern California, a positive experience with CAISO’s Western Energy Imbalance Market was a key factor in the decision to also join the ISO’s Extended Day-Ahead Market.
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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
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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