March 10, 2025

Western Energy Imbalance Market (WEIM)

CAISO
‘Operational Surprises’ Contributed to CAISO July 2023 Emergencies
CAISO’s own systems may have contributed to a set of “operational surprises” that forced it to declare a series of energy emergency alerts in July 2023, a member of the ISO’s Market Surveillance Committee said.
CAISO
WEIM Yields $365M in Q2 Benefits with Hot Start to Summer
CAISO’s Western Energy Imbalance Market provided its 22 participants with $365.04 million in economic benefits from April to June down 4% from the same period a year ago.
© RTO Insider LLC
New Western ‘Regional Organization’ Could be Folsom-based
The new "RO" envisioned by the West-Wide Governance Pathways Initiative might be based near CAISO’s headquarters in Folsom, Calif., according to a straw proposal.
CAISO
CAISO Advances Pathways Initiative ‘Step 1’ Proposal to Board Vote
CAISO will recommend its board approve a proposal to eventually give the WEM Governing Body increased authority over both the Western EIM and EDAM.
© RTO Insider LLC
BPA Stepping up Participation in Pathways Initiative
The Bonneville Power Administration is ramping up its engagement with the West-Wide Governance Pathways Initiative, an executive with the federal power agency said.
CAISO
WEIM Governing Body Officially Changes Name
The WEIM Governing Body voted to change its name to the “Western Energy Markets” Governing Body to better reflect its full scope of responsibility since it began overseeing CAISO’s EDAM.
© RTO Insider LLC
Pathways Participants See ‘Pivotal’ Chance to Build New Kind of RTO
The West faces a “pivotal” opportunity to develop a fresh approach to managing its electricity markets, one that could update RTO governance to better accommodate the public policy.
Grid United
Study: Significant Benefits for Merchant Tx Line
High-voltage transmission developer Grid United says its proposed North Plains Connector would provide significant reliability capacity benefits to interregional transmission, according to a study.
© RTO Insider LLC
Portland General Electric Formalizes EDAM Commitment
Portland General Electric became the second entity in the Western U.S. after PacifiCorp to sign an implementation agreement for the Extended Day-Ahead Market.
© RTO Insider LLC 
Busy Summer Ahead for Pathways Initiative
Participants in the West-Wide Governance Pathways Initiative face a busy meeting schedule this summer as the group’s leaders look to advance on parallel fronts to develop a Western “regional organization.”

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