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March 17, 2026

SPP Markets+

U.S. Army Corps of Engineers
BPA Releases Draft Decision Solidifying Markets+ Choice
BPA released its draft proposed decision to join SPP’s Markets+, saying that preparations have advanced to a point where it can “move forward with implementation and propose joining Markets+ in October 2028.”
© RTO Insider 
EDAM Governance Questioned During NV Energy Hearing
As Nevada regulators consider NV Energy's request to join CAISO's Extended Day-Ahead Market, the debate over the independence of EDAM's governance is intensifying.
© RTO Insider 
California’s Anxiety is not About Seams; It’s About Control
For the first time in years, California’s grip on Western market design is genuinely at risk, writes Nick Myers of the Arizona Corporation Commission.
© RTO Insider 
Top CAISO, SPP Executives Talk Competition and Collaboration
Conversations remained cordial despite the ongoing competition between CAISO and SPP in the west as the RTOs’ top executives took the stage at Yes Energy’s annual EMPOWER conference.
Grant County PUD
SPP Secures 2 More Commitments for Markets+ in Washington

SPP has secured two new commitments for its day-ahead Markets+, as Grant County Public Utility District and Tacoma Power in Washington state announced their intent to join.

Aurora Energy Research
APS Would See Greater Savings in EDAM, Analysis Finds
Arizona Public Service would save $110 million/year by joining CAISO's Extended Day-Ahead Market rather than SPP's Markets+, a new analysis found.
Bonneville Power Administration
Nonprofits Tell 9th Circuit BPA’s Day-Ahead Market Decision Poses ‘Imminent’ Harm
The consequences of the Bonneville Power Administration’s decision to join SPP’s Markets+ could hit the Northwest sooner rather than later even though the agency has yet to formally join the market, a group of nonprofits suing it over the choice told the 9th U.S. Circuit Court of Appeals.
© RTO Insider
CAISO Unveils Principles for Western Seams Coordination
CAISO released a set of guiding principles for upcoming discussions about seams between the ISO, SPP and other entities as the Extended Day-Ahead Market nears its opening in May.
Western Energy Markets
Caution Urged as Regulators Consider NV Energy’s Request to Join EDAM
Some parties are urging Nevada regulators to wait until initial results are in for CAISO's Extended Day-Ahead Market before deciding whether to allow NV Energy to join.
© RTO Insider 
EDAM Town Hall Highlights ‘Pivotal Moment for the West’
CAISO leaders staged a virtual “town hall” to stress the importance of a smooth rollout to the ISO’s Extended Day-Ahead Market in May and promise to address market seams issues.

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