MISO
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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.
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MISO’s preliminary 2025 Transmission Expansion Plan is set to become another record-breaking collection, at 434 transmission projects at an estimated cost of $11 billion.
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MISO emerged from winter 2024/25 without turning to emergency procedures despite wide-ranging winter storms Jan. 6-9 and again Jan. 20-22.
Entergy Mississippi, Sargent & Lundy
MISO hopes to become the next RTO with a limited express lane in its interconnection queue to help get badly needed generation online faster.
Minnesota Public Utilities Commission
Minnesota regulators voted unanimously to require that Amazon demonstrate a need for a 250-unit fleet of backup diesel generators at its proposed data center in the state.
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MISO estimates its savings and efficiencies benefited its members to the tune of just over $5 billion over 2024.
Entergy
FERC has given the Palisades Nuclear Plant special permission to exceed MISO’s 36-month limit on generator suspensions as owner Holtec International works through the plant’s reopening.
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MISO is nearing an overhaul of its capacity accreditation methods for load-modifying resources and demand response that would be based on whether they can assist during periods of high system risk.
American Transmission Co.
MISO expects the revamp of its transmission planning futures will be done by November and will yield an extra scenario dedicated to slow-moving generation construction.
ITC Midwest
MISO said it doesn’t think it needs to step up cost monitoring on its ever-larger transmission projects as some stakeholders call for tighter measures.
Entergy
The MISO South region relied on transfers from the Midwest to handle a record, 33-GW winter peak during a late January winter storm.
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