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December 6, 2025

Transmission

Office of Sen. Jeff Merkley
West Coast Senators Urge Passage of Calif. Pathways Bill
Six Western U.S. senators came out in support of the California legislation needed to transform CAISO’s market into an independent regional energy market, saying in a letter to Gov. Gavin Newsom the bill promises "improved grid reliability and significant energy cost savings.”
© RTO Insider 
SPP Board Approves 765-kV Project’s Increased Cost
SPP’s Board of Directors has approved a pair of contentious measures that were put aside during its August quarterly meeting, a tariff change to integrate and operate high-impact large loads and a revised cost estimate for a 765-kV transmission project.
MISO
MISO 2025 Tx Expansion Estimate Drops Slightly to $12.4B
The cost estimate for MISO’s 2025 Transmission Expansion Plan has fallen slightly from previous estimates to $12.36 billion.
Meta
MISO Selects 10 Gen Proposals at 5.3 GW in 1st Expedited Queue Class
MISO has assembled the 10 generation finalists to enter its first interconnection queue fast track. The list includes five natural gas proposals, three solar farms, one wind farm and a battery storage facility.
U.S. Army Corps of Engineers
BPA Transmission Pause Questioned During Workshop
The Bonneville Power Administration estimates it would take up to seven years and billions of dollars in upgrades for the agency to handle the 65 GW of transmission service requests in the queue. 
ISO-NE
ISO-NE Monitor Discusses Market Trends, Energy Transition
The New England wholesale electricity markets performed competitively in 2024, while decreased imports and higher emissions compliance rates increased overall market costs, the ISO-NE Internal Market Monitor told the NEPOOL Participants Committee.
SPP
SPP, Members Developing 765-kV Transmission Overlay Plan
SPP and its members are working together on a draft 765-kV transmission overlay as part of its 2025 Integrated Transmission Planning assessment that will dwarf 2024's record study.
Ontario Energy Board
Ontario Energy Board Plans 22% Spending Increase
The Ontario Energy Board plans a 22% increase in its 2025/26 budget with the addition of 32 employees, its biggest hiring surge in at least five years.
Shutterstock
Parties Argue for Appeal of Order 1920’s Tx Reforms in First Set of Briefs
Parties filed their first briefs in the appeal of FERC Order 1920, which mandated changes to regional transmission planning and cost-allocation rules.
PG&E
Western Utilities Set Sights on RTO After DAM Choice
Four Western utility executives participating in an Energy Bar Association webinar presented their reasoning for why they ultimately chose either SPP’s Markets+ or CAISO’s EDAM, with some eyeing the creation of a full regional transmission organization in the future.

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