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December 5, 2025

Midcontinent Independent System Operator (MISO)

Entergy
MISO South Regulators Ready to Strike Out on Their Own for Tx Cost Allocation
MISO South states have signaled their intent to strike out on their own on a cost allocation design for long-range transmission projects located exclusively in the South subregion.
MISO
MISO Draft Tx Planning Futures Envision 400-GW Supply or More by 2045
MISO predicts it will have anywhere from 383 GW to 454 GW of installed capacity its footprint by 2045, according to a preliminary version of its 20-year planning futures.
Invenergy
Enviros Challenge MISO, SPP Queue Express Lanes
Environmental groups are further pressing their opposition to MISO's and SPP’s fast-track studies for primarily fossil fuel projects, challenging both at the D.C. Circuit in a pair of lawsuits.
MISO
$12B MISO 2025 Tx Portfolio Close to Final Approval
A MISO board committee advanced 432 projects from transmission owners at a cost of almost $12.3 billion under the RTO’s 2025 Transmission Expansion Plan.
Alcoa
FERC Gives Go-ahead on Tougher MISO DR Testing Rules
FERC greenlit MISO’s plan to require its demand response to make real-world demand reductions to fulfill the RTO’s testing requirements.
Consumers Energy
DOE Issues 3rd Emergency Order to Keep Michigan Coal Plant Open
The U.S. Department of Energy has reupped a coal-fired power plant in Michigan for another 90-day operations period, preventing its planned retirement for a third time.
MISO
MISO Agrees with All 4 IMM State of the Market Recs
MISO said all four recommendations in the Independent Market Monitor’s 2024 State of the Market Report are likely viable.
Entergy Texas
MISO to Include Southeastern Texas in South Long-range Tx Planning
MISO announced it will honor a request from Texas regulators and include southeastern Texas in its first long-range transmission study for MISO South.
Entergy
IMM Advises Better Constraint Management After MISO Tx Emergency
MISO’s Independent Market Monitor said a MISO South September transmission emergency shows the RTO needs a better handle on constraint management within its markets.
Shutterstock
MISO Re-examining Monthlong Outage Limit for Capacity Resources
MISO signaled an openness to alter its 31-day planned outage rule for units that signed up to be capacity resources.

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