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December 5, 2025

MISO

The Midcontinent Independent System Operator is a regional transmission organization that plans transmission projects, administers wholesale markets for its membership and manages the flow of electricity in Arkansas, Illinois, Indiana, Iowa, Kentucky, Louisiana, Michigan, Minnesota, Mississippi, Missouri, Montana, North Dakota, South Dakota, Texas and Wisconsin. 
Ameren Missouri
MISO Declines Stakeholder Ask for Pause on 2025 Queue to Clear Backlog
MISO said it will not postpone the kickoff of a study on its 2025 cycle of interconnection requests, rebuffing stakeholders’ requests for a slowdown to clear some of the queue’s four-year backlog.
MISO
MISO Floats ‘Zero Injection’ Agreements to Bring Co-located Gen Online
MISO is considering a new type of interconnection agreement for generation built on site and strictly for new large loads.
Entergy
MISO Accepts 6 GW of Mostly Gas Gen in 2nd Queue Fast Lane Class
MISO will study 6 GW of mostly natural gas-fired generation projects in the second group of entrants under its interconnection queue fast track.
Ameren Missouri
Mo. PSC Adds Consumer Protections to Ameren Large Load Rate Plan
The Missouri PSC unanimously approved a settlement agreement on rates for Ameren’s large load customers that insulates ratepayers from most costs associated with supplying data centers’ electricity needs.
Shutterstock
FERC Allows MISO to Increase Project Count in Queue Fast Lane
FERC approved MISO’s proposal to increase the number of generation projects it may study under its expedited interconnection queue lane from 10 to 15 per quarter.
© RTO Insider LLC
MISO to Debut Tx Warning System in 2026
MISO is to roll out a new transmission warning declaration to give its members advanced notice when scarce transmission capacity is raising the risk of load shed.
© RTO Insider 
MISO TOs Oppose Tx Cost Containment Suggestions
Multiple transmission owners have questioned the need behind a suggestion that MISO work more checks into its process for reviewing troubled transmission projects.
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.

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