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December 5, 2025

CAISO Extended Day-Ahead Market (EDAM)

© RTO Insider LLC
Pathways’ ROWE Could Offer Western RA Program, PGE Says
The West-Wide Governance Pathways Initiative could lead the charge on developing an alternative to the Western Resource Adequacy Program that would integrate with CAISO’s Extended Day-Ahead Market, according to co-Chair Pam Sporborg.
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FERC Report Urges West to Address Looming Market Seams Issues
A new FERC report adds to the growing body of work showing the complexity of confronting the seams issues likely to arise between the West’s two day-ahead markets when compared with challenges at the borders between RTOs and ISOs in the Eastern U.S.
PacifiCorp
PacifiCorp Staffs Up Ahead of EDAM Launch
PacifiCorp is hiring additional employees to prepare for CAISO’s Extended Day-Ahead Market next year, with staff expecting the launch will bring a few “scratches and bruises.”
CAISO
Market Monitor Urges CAISO to Reconsider EDAM Intertie Proposal
CAISO's Department of Market Monitoring has asked the ISO to re-evaluate its intertie scheduling proposal for the Extended Day-Ahead Market due to potential impacts on market participants.
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Updated: SPP Markets+ Cruising Through Early Development
SPP says the development of its Markets+ day-ahead market in the West is proceeding on time and under budget, with the hard part yet to come.
Brattle Group
Brattle Study Finds Similar PRMs Under Alternative Western RA Footprint
A new Brattle Group study examined the impact on planning reserve margins of an alternative Western resource adequacy program that includes expected participants in CAISO’s Extended Day-Ahead Market.
CAISO
EDAM Intertie Scheduling Processes Raise Stakeholder Concerns
At one of the most well attended workshops of the year, CAISO staff described new processes for scheduling intertie resources and resource adequacy imports in EDAM.
New Mexico Renewable Energy Transmission Authority
WRAP Day-Ahead Market Task Force Looks to Future After Commitments, Withdrawals
The Western Resource Adequacy Program Day-Ahead Market Task Force held its first meeting after the program’s binding decision deadline, with members exploring how the new participant footprint will impact transmission connectivity and other issues.
Shutterstock
Nonprofits Ask 9th Circ. to Vacate BPA’s ‘Shocking’ Day-ahead Market Decision
A group of nonprofits suing BPA said its decision to join SPP’s Markets+ instead of CAISO’s EDAM “violated clear mandates from Congress.”
Seattle City Light
WRAP Wins Commitments from 16 Entities

Sixteen entities have committed to participating in the Western Resource Adequacy Program’s first financially “binding” season covering winter 2027/28, the Western Power Pool said.


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