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February 23, 2026

Midcontinent Independent System Operator (MISO)

TrainManBrodie via YouTube
Vistra Extends Baldwin Coal Plant Operations as MISO RA Risk Climbs
Vistra is extending the life of its coal-fired Baldwin Power Plant in Illinois through 2027 amid MISO delivering warnings over a supply crunch in its footprint.
MISO
Cost Overruns on Project in 1st LRTP Prompt MISO Analysis
MISO will examine one of the long-range transmission projects from its first portfolio following a cost increase of more than two and a half.
© RTO Insider LLC 
FERC Seeks Nearly $1B in Penalties from EE Provider in MISO, PJM
FERC has ordered American Efficient to defend its energy efficiency programs in PJM and MISO or pay a $722 million penalty and return $253 million in profits to ratepayers.
SPP
MISO, SPP to Revise Joint Agreement, Focus on TMEP Process in 2025
MISO and SPP staff told stakeholders that they will not perform a Coordinated System Plan in 2025 but will accept transmission issues for their annual review early in the year.
Shutterstock
MISO Decides Against Revising Guiding Principles
MISO said it will leave the 10-year-old guiding principles for its market design untouched after it conducted a check-in with stakeholders to gauge whether they are still valid in a rapidly changing industry.
© RTO Insider LLC
Voltus Seeks Ability to Replace Customers in MISO DR Aggregations
Voltus filed a complaint at FERC over MISO's interpretation of a recent rule change that led the grid operator to stop accepting replacements for customers who sign up to provide demand response but retire.
© RTO Insider LLC
Exiting MISO President Proud of Tx Trailblazing, Says Load Growth Doable
MISO President Clair Moeller predicted MISO will face a few tough years before securing enough generation to tame load growth and fashioning operational tools that help subdue the volatility of renewable energy.
© RTO Insider LLC 
MISO Tells Board RA Fast Lane in Interconnection Queue is a Must
MISO told its Board of Directors that drafting an interconnection queue express lane for generators that resolves resource adequacy risks and has stamps of approval from regulators is essential.
© RTO Insider LLC
MISO Estimates Solar Fleet will be 12 GW by Winter’s End
MISO expects its in-service solar capacity to grow to 12 GW by the end of winter, a 50% increase over its existing fleet.
© RTO Insider LLC 
MISO Board Endorses $21.8B Long-range Transmission Plan
The MISO Board of Directors approved a landmark, 24-project, mostly 765-kV collection of transmission lines and facilities for the RTO’s Midwest region at a cost of $21.8 billion.

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