February 23, 2025

Western Energy Imbalance Market (WEIM)

Stanford Woods Institute for the Environment
Single Western Market Best for Reliability Needs, Panelists Say
A single Western market is one of the safest bets to address the region’s reliability and cost issues in the face of extreme weather events, proponents of the West-Wide Governance Pathways Initiative said during a panel discussion.
CAISO
CAISO Kicks Off New Initiative to Streamline Bilateral Trading

A new initiative to streamline and expand bilateral trading in the Western Energy Imbalance Market and Extended Day-Ahead Market has been launched, marking another step toward EDAM implementation.

Arizona Public Service
Markets+ Backers Highlight Reliability in 2nd ‘Issue Alert’
The integration of Markets+ with the Western Resource Adequacy Program would be among a handful of key reliability benefits of SPP’s Western day-ahead offering, according to an “issue alert” published by 10 entities that backed development of the market.
California Senate
California Energy Officials Pitch Pathways Plan to State Senators
California energy agency heads appeared before state lawmakers to pitch the proposed CAISO governance changes being developed by the West-Wide Governance Pathways Initiative.
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.
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.
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 
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.”
Moonwater Capital
PUCN Sets Framework for NV Energy’s EDAM Participation
As NV Energy moves forward with plans to join CAISO’s Extended Day-Ahead Market, Nevada regulators have laid out a framework for how the company can seek approval for EDAM participation.
West-Wide Governance Pathways Initiative
Pathways Backers Advance WEIM/EDAM Governance Proposal
Backers of the West-Wide Governance Pathways Initiative will move quickly on a proposal to alter the governance of CAISO’s Western EIM and EDAM after voting to approve the plan.

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