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December 19, 2025

EDAM

The Bonneville Power Administration
BPA Market Decision on Track Despite Calls for Delay
BPA remains on track to issue a decision on which day-ahead market to join by May 2025 despite calls to delay it until fall 2025 to give the agency more time to reconsider its leaning toward SPP’s Markets+.
NOAA
CAISO Leaders Look Ahead to 2025 with Confidence
CAISO, California and other parts of the West head into 2025 with a heavy load of priorities: implementing EDAM, developing the infrastructure needed to meet ambitious climate goals, and moving forward with new and continuing initiatives to address some of the ISO’s biggest challenges.
© RTO Insider LLC
EDAM Won’t Eliminate WEIM-only Option, CAISO CEO Says

CAISO’s launch of the Extended Day-Ahead Market will not spell the end of a Western real-time-only offering from the ISO, according to CEO Elliot Mainzer.

Kevin Dooley, CC BY-SA-2.0, via Wikimedia Commons
Western Market Developers Compare Approaches to GHGs
On the surface, CAISO’s Extended Day-Ahead Market and SPP’s Markets+ will take similar approaches to accounting for greenhouse gas emissions — but important differences remain.
Bonneville Power Administration
BPA Touts Markets+ in Response to Seattle City Light Opposition
The Bonneville Power Administration continued to argue that SPP’s Markets+ is preferable to CAISO’s EDAM, stating in a letter to Seattle City Light that potential benefits of a single West-wide market footprint must be viewed with “significant skepticism."
LADWP
LADWP Gets Board’s OK to Join CAISO’s EDAM
The Los Angeles Board of Water and Power Commissioners gave the go-ahead for LADWP to join CAISO’s EDAM, in a move expected to increase the utility’s annual net revenue by almost $40 million.
Tacoma Public Utilities
Pathways Step 2 Not Good Enough, Markets+ Backers Say
The West-Wide Governance Pathways Initiative still grapples with political uncertainties and governance concerns despite efforts to fix those issues, proponents of SPP’s Markets+ contended.
© RTO Insider LLC
CAISO Considering Fast-start Pricing for Extended Day-Ahead Market
CAISO is considering how to apply fast-start pricing to the Extended-Day Ahead Market — a topic that has been a sticking point for some as entities across the West decide which day-ahead market to join.
© RTO Insider LLC 
BANC Signs Agreement to Join EDAM
The Balancing Authority of Northern California became the third entity to formally join CAISO’s Extended Day-Ahead Market, following PacifiCorp and Portland General Electric.
Salt River Project
4 Arizona Utilities Commit to Joining Markets+
The joint announcement by APS, SRP, TEP and UniSource Energy marks a significant win for SPP after a string of victories for CAISO’s competing Extended Day-Ahead Market.

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