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December 28, 2025

California Independent System Operator (CAISO)

© RTO Insider
Western Stakeholders Support Continuing EIM Regional Forum
Stakeholders and EIM Governing Body members gathered in Las Vegas to express their support for the CAISO-created Regional Issues Forum.
SMUD Balancing Area Inks Agreement for EIM Membership
The balancing area for the Sacramento Municipal Utilities District signed an agreement allowing SMUD to join the Western EIM in 2019.
Stakeholders See Shortcomings in Western Interregional Tx Planning
Stakeholders expressed concerns over how the Western Interconnection’s four transmission planning organizations can align their separate regional processes.
CAISO Stakeholders Seek Clarity on Black Start Procurement Plan
CAISO market participants continue to seek more details about an “expedited” ISO proposal to procure black start resources.
Local Officials Appeal to FERC as Oroville Water Levels Recede
Butte County urged FERC to order the California Department of Water Resources to establish its own public safety program to help manage the Oroville Dam.
High Hydro, Increased Solar Point to Spring Curtailments for CAISO
CAISO may curtail a massive amount of renewable energy this spring when increased solar output is expected to coincide with increased hydropower.
CAISO Proposes TO-focused Black Start Procurement
CAISO’s straw proposal for procuring black start resources would entail significant collaboration with affected transmission owners.
Questions Linger over CAISO Small TO Interconnection Proposal
Stakeholders have lingering questions about the CAISO interconnection proposal to protect small transmission owners from bearing the costs of upgrades.
CAISO Takes First Stab at Defining Frequency Response Market
CAISO officials and stakeholders discussed the ISO's primary frequency response product initiative.
CAISO Issues Final Plan for Small TO Interconnection Costs
The CAISO proposal would prevent small transmission owners from bearing high interconnection costs, a circumstance faced by Valley Electric.

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