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March 12, 2026

Western Energy Imbalance Market (WEIM)

EIM Governing Body Gains Member, Loses Another
The EIM Governing Body voted unanimously to confirm new member Anita Decker, but Chair Carl Linvill also announced the resignation of member Travis Kavulla.
Rising Solar Boosts EIM Q2 Benefits to $86M
CAISO secured the largest chunk of the EIM’s $86 million in gross benefits during the second quarter as the solar-heavy ISO exported 2.16 million MWh.
Customers Probe BPA on EIM Impact
BPA dispelled lingering doubts about its intent to join the Western EIM, but will take time to address stakeholders about how the move will affect them.
CAISO OKs EIM Governance Review
Leaders of CAISO and its EIM established a panel to update the EIM’s governance as the real-time market grows and likely adds day-ahead bidding.
Patchwork of Carbon Policies Troubles Western EIM
A carbon workshop hosted by the EIM underscored how West Coast and Intermountain states can be uneasy partners in CAISO’s real-time market.
BPA Marches Toward EIM Membership
The Bonneville Power Administration (BPA) took another step toward membership in the Western EIM when it kicked off a monthlong public comment process.
CAISO Defers Day-ahead, SATA Initiatives
CAISO is postponing stakeholder initiatives on day-ahead market enhancements and storage-as-transmission assets, while adding four new initiatives.
Turlock Irrigation District to Join Western EIM
CAISO said that Turlock Irrigation District, California’s oldest irrigation district, signed an agreement to join the Energy Imbalance Market in April 2021.
Tucson Electric Power Signs up for Western EIM
The Western Energy Imbalance Market chalked up another future member after Tucson Electric Power signed an agreement saying it will join in April 2022.
PG&E Departure Leaves EIM Vacancy
The CAISO Energy Imbalance Market's Governing Body will search for a candidate to replace Kristine Schmidt after she resigned earlier this month.

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