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December 20, 2025

Sacramento Municipal Utility District (SMUD)

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NV Energy Filing Reveals Extensive Talks Around EDAM RA Program
Future participants in CAISO’s EDAM have already held extensive talks about developing an alternative to the Western Power Pool’s WRAP for non-CAISO EDAM members, NV Energy confirmed in a filing with Nevada utility regulators.
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.
SMUD
Calif. Utilities Move Cautiously on Dynamic Pricing
Two of California’s publicly owned utilities told state regulators they’re not ready to make the leap to rates that change hourly or more often.
The Brattle Group
Brattle Study Shows Big Benefits for California in ‘Expanded’ EDAM
California ratepayers would save millions more in a CAISO Extended Day-Ahead Market encompassing nearly all the West than in one that includes only those utilities likely to join the market, according to a new Brattle Group study.
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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.
WAPA
WAPA Sierra Nevada Region to Advance with EDAM
The Western Area Power Administration said its Sierra Nevada region will pursue “final negotiations” to join CAISO’s Extended Day-Ahead Market, notching another — if expected — victory for the ISO in its competition with SPP’s Markets+.  
The Brattle Group
Brattle Study Finds EDAM Gains, Markets+ Losses for BPA, Pacific NW
BPA would earn $65 million in annual benefits from joining CAISO’s EDAM but face $83 million in increased yearly costs from participating in SPP’s Markets+, according to a new Brattle study.
LADWP
LADWP Poised to Join CAISO Day-ahead Market After Board OK

CAISO notched another victory in the competition to bring organized markets to the West when the Los Angeles Department of Water and Power’s oversight board authorized the utility to prepare to join EDAM.

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West Entered Pivotal Period for RTO Development in 2023

Future historians of the U.S. electricity sector one day might conclude the development of an RTO in the West hinged on two separate but interrelated events occurring on one day in July 2023.

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Forum Turnout, Tone Could Signal Growing Support for EDAM
The stars may not yet have aligned for CAISO in the contest to bring an organized electricity market to the West, but key industry players appeared to be doing just that at an ISO event to celebrate the progress of its Extended Day-Ahead Market.

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