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December 23, 2025

RTO Insider

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.
Constellation Energy
Aging, Expensive N.Y. Nuclear Plants a Bargain, Report Finds
A new report estimates keeping New York’s aging commercial nuclear reactors running through 2050 would result in $50 billion in energy savings.
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.
Tri-State Generation and Transmission Association
Tri-State Seeks FERC Approval for Data Center Load Tariff
Tri-State G&T is seeking FERC’s approval for a new tariff designed to manage the heavy volume of data center load expected to materialize in its member utilities’ service territories over the next decade.
Lawrence Berkeley National Laboratory
Large-load Tariffs Touted as Alternative to ‘Side Deals’
As regulators grapple with rate design for large customers such as data centers, some experts are pointing out the transparency benefits of tariffs compared to special contracts between the utility and customer. 
MISO
MISO: Market Platform Replacement will be Overbudget, Stretch into 2028
MISO said its nine-year effort to replace its market platform will exceed original budget contingencies and won’t be completed until 2028, three years later than previously predicted.
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Senators Focus on FERC’s Independence at Swett, LaCerte Confirmation Hearing
FERC nominees Laura Swett and David LaCerte took questions from senators at a confirmation hearing, including many about the future of independent agencies.
Revolution Wind
Revolution Wind Sues to Lift Federal Stop-work Order
Revolution Wind’s developers are seeking an emergency injunction against the federal stop-work order slapped on the offshore wind project.

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