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March 10, 2026

Western Energy Imbalance Market (WEIM)

West-Wide Governance Pathways Initiative
Revised Pathways Proposal Focuses on Sector Issues
The West-Wide Governance Pathways Initiative has revised its “regional organization” stakeholder process proposal to expand the size of a key stakeholder committee and boost representation for some groups.
NOAA
Batteries, Energy Transfers Support ‘Uneventful’ Summer in West
The growth of battery storage resources in the West largely contributed to an "uneventful" summer on the grid, despite record-breaking peak loads and temperatures.
The Brattle Group
Brattle Study Finds EDAM Gains, Markets+ Losses for BPA, Pacific NW
BPA would earn $65 million in annual benefits from joining CAISO’s EDAM but face $83 million in increased yearly costs from participating in SPP’s Markets+, according to a new Brattle study.
© RTO Insider LLC
Regulators Who Launched Pathways Praise Western ‘RO’ Plan
State utility commissioners who launched the West-Wide Governance Pathways Initiative in July 2023 have praised the initiative’s “Step 2” proposal to create a “regional organization.”
PacifiCorp
Brattle Study Likely to Fuel Debate over EDAM, Markets+

The white paper by The Brattle Group offers a point-by-point comparison of CAISO’s Extended Day-Ahead Market and SPP’s Markets+ that leans in favor of EDAM but stops short of endorsing either market.

Yes Energy
Regulators Worry Data Centers Consume Too Much Clean Energy
Pairing power-hungry data centers with clean energy resources is sparking mixed feelings among regulators, who say the grid already is straining with increased electrification and connecting new energy sources.
CAISO
CAISO Launches Phase 2 of Pricing Issues Initiative
The next phase of the Price Formation Enhancements Initiative will look to address issues around market power mitigation, scarcity pricing and fast-start pricing.
CAISO
CAISO Seeks to Dispel CRR ‘Myths’ Around January Cold Snap
CAISO focused on CRRs when it served up the latest volley in the ongoing dispute over what played out on the Western grid during the January cold snap that forced Northwest utilities to import high volumes of energy to avoid blackouts.
Shutterstock
CAISO Passes Initiatives to Address Meter Data Reporting, Expand Trading
The CAISO Board of Governors and Western Energy Markets Governing Body passed two proposals that address different issues within Western markets.
West-Wide Governance Pathways Initiative
Pathways Initiative Releases ‘Step 2’ Proposal for Western ‘RO’
Pathways released its Step 2 draft proposal for dividing up functions between CAISO and the new “regional organization” that initiative backers are seeking to create to oversee the ISO’s Western real-time and day-ahead markets.

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