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December 6, 2025

Midcontinent Independent System Operator (MISO)

KFYR-TV
MISO Petitions 8th Circuit in Dispute with SPP over Data Center-strained Flowgate

MISO is seeking judicial review of two FERC decisions preventing the RTO from recouping costs or revising a joint procedure with SPP over a shared North Dakota transmission line that has become congested by a new cryptocurrency mining facility.

© RTO Insider 
State Regulators Weigh Drafting Alternative to MISO Tx Cost Allocation
Regulators of MISO states are mulling whether they should work together to offer up an entirely new cost allocation for the RTO’s long-range transmission projects.
MISO
MISO Summer Capacity Prices Shoot to $666.50 in 2025/26 Auction
MISO’s 2025/26 capacity auction returned $666.50/MW-day prices across all zones in the summer, reinforcing the need for members to build new generation fast, the grid operator said.
Xcel Energy
MISO Debuting Flag System to Curb Deviations from Dispatch
MISO said it will debut a new flag system within weeks to give stronger signals to generation owners when their units deviate from their dispatch instructions.
ITC Midwest
Consumer Groups Invoke DOJ Stance in Stalled Complaint on ROFRs in MISO Planning
A collective of consumer groups has invoked a recent letter from the U.S. Department of Justice in an attempt to get FERC to act on its three-year-old complaint against MISO deferring to state right of first refusal laws in regional planning.
MISO
MISO: New Software Effective, Faster than Previous Queue Study Process
MISO concluded that Pearl Street’s SUGAR automation software is an effective alternative to the power flow simulations it used to conduct to identify network upgrades for generation projects in the queue.
MISO and PJM
MISO, PJM Forgo Typical Interregional Studies for Novel Transfer Work
MISO and PJM will not take on customary interregional planning studies this year, deciding they have enough on their plates with a new and in-progress joint transfer study.
© RTO Insider
End Users Push MISO for More Intensive Cost Overrun Evals on Tx Projects
MISO’s end-use customers called for more “insight and transparency into” the variance analysis as well as a lower, 10% threshold on cost overruns to trigger the analysis.
MISO
MISO Forming 4th Tx Planning Scenario Based on Supply Chain Barriers
MISO is on its way to installing a fourth, 20-year future to inform transmission planning in case supply chains remain unsteady.
McDermott International
DC Circuit Rejects Entergy Attempt to Save MISO Capacity Obligation Rule
An appeals court has denied Entergy’s repeat attempt to revive a 50% minimum capacity obligation rule for MISO’s load-serving entities, concluding Entergy lacked standing.

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