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December 5, 2025

Midcontinent Independent System Operator (MISO)

Entergy Corp.
Texas PUC Approves Entergy Gas Plants, Caps Costs
Texas regulators have approved Entergy Texas’ request to build two natural gas-powered units in MISO’s portion of the state, but they have limited the construction costs eligible for recovery to a combined $2.4 billion.
Poettker Construction
Ameren Resolute in 1st Dibs on Long-range Transmission Projects in Illinois
Ameren Illinois remains adamant that it should have exclusive access to construct nearly $2 billion of MISO regional transmission projects in the state without competition.
MISO
MISO, Stakeholders Appeal to FERC to Leave Long-range Tx Plan Intact
MISO and several stakeholders came to the defense of the RTO’s $21.8 billion, 24-project long-range transmission plan portfolio for the Midwest as five Republican states seek to repeal the projects’ approval.
© RTO Insider LLC
MISO Discloses $280M Error, Over-procurement in 2025/26 Capacity Auction
MISO said a yearslong software error caused it to clear more capacity than intended in past capacity auctions and which has resulted in an approximate $280 million impact to market participants in this year’s auction.
© RTO Insider 
FERC Commissioners Debate 60/40 Capital Structure for Transmission
An apparently routine rate incentive request from a MISO transmission developer who has yet to be assigned a project turned into a debate between FERC commissioners over capital structures in ratemaking.
Consumers Energy
Consumers Energy to Offload 13 Michigan Hydro Dams to Investment Firm for $1 Each
After years of looking for a buyer, Consumers Energy announced it struck a $13 deal to sell its fleet of 13 hydroelectric dams in Michigan to a Bethesda, Md., private equity firm.
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.
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.
© RTO Insider 
MISO Seeking Realistic Gen Buildout for Tx Planning Futures
MISO said its set of 20-year transmission planning futures must be further fine-tuned after the Trump administration’s repeal of tax credits for renewable generation.

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