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December 19, 2025

EDAM

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FERC OKs Imperial Irrigation District’s WEIM Agreement

FERC approved CAISO's Western Energy Imbalance Market implementation agreement with Imperial Irrigation District.

CAISO
EDAM Implementation Team Reveals New Intertie Scheduling Approach

CAISO staff showed how the grid operator plans to implement certain parts of its Extended Day-Ahead Market, with stakeholders asking for more time to comment on what they said crossed into potential policy revisions.

DOE
BPA Supported by Trade Orgs in Suit over Day-ahead Market Decision
Trade organizations for utilities and large energy consumers seek to intervene in the lawsuit filed in the 9th Circuit Court of Appeals challenging the Bonneville Power Administration’s decision to join SPP’s Markets+ instead of CAISO’s EDAM.
West-Wide Governance Pathways Initiative
Pathways Initiative Clarifies Near-term Division of Labor with CAISO
The West-Wide Governance Pathways Initiative will run its stakeholder processes separately from CAISO’s until the effort's regional organization is formally launched in 2028, even in areas of overlapping interest.
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WRAP Task Force Explores Optimization Under Day-ahead Markets
A new task force will examine how the WPP’s WRAP can continue to operate efficiently under the new multimarket environment emerging in the West.
Andre m, CC BY-SA 3.0, via Wikimedia Commons
Calif. Pathways Bill Delayed After Orgs Withdraw Support, While Newsom Signals Backing for Effort
The author behind the bill that would allow CAISO to relinquish market governance to an independent RO has delayed a hearing after several organizations withdrew support for the proposed legislation.
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‘Islanded’ BAs Face Tough Choices in Western Market Future, Experts Say
Although one of the aims of day-ahead markets in the West is to fix a fragmented transmission landscape, some islanded entities will have a tough time navigating seams issues likely to arise as markets take shape, analysts at Aurora Energy Research said during a webinar.
PNM
PNM Signs Agreement to Join CAISO’s EDAM

Public Service Company of New Mexico made it official: The utility signed an implementation agreement to begin participating in CAISO’s Extended Day-Ahead Market in fall 2027.

Quanta Infrastructure Solutions Group
New CAISO-Powerex Dispute Centers on ‘Voluntary’ Nature of EDAM
CAISO dismissed Powerex’s contention that the ISO only recently has “revealed” that participation in its EDAM is voluntary at the balancing authority level but not voluntary for “individual customers” operating within the BA participating in the market.
CAISO
Panel Ponders Impacts, Priorities Around Western Market Seams

The formation of two competing day-ahead markets will create seams across the West, but at least one utility representative is more worried about seams resulting from the fracture of CAISO’s real-time Western Energy Imbalance Market.


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