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December 26, 2025

Midcontinent Independent System Operator (MISO)

© RTO Insider
Stakeholders Critical of MISO Resource Availability Filing
Stakeholders are skeptical of MISO's proposed Tariff revisions imposing stricter outage rules and load-modifying resource requirements.
FERC Approves Revised TMEP Cost Allocation
MISO had its revised cost allocation proposal for the RTO’s targeted market efficiency projects with PJM approved by FERC.
MISO
Stakeholders Press MISO on Storage Role
Energy Storage is glaringly absent from MISO’s potential plans to manage a possible 40% renewable penetration on the grid, stakeholders told the RTO.
NextEra Wins Bid to Build MISO’s 2nd Competitive Project
MISO said it has selected NextEra Energy Transmission Midwest to construct the Hartburg-Sabine junction project, wrapping up months of evaluation.
Report: MISO, PJM Must Change Markets for Renewables
A new report released says full market participation for renewables will require revisions to electricity markets, particularly in MISO and PJM.
MISO Gas Study Finds Minuscule Pipeline Risks
MISO’s reliability is unlikely to be hampered by gas supply issues, according to a new study.
MISO September and October dispatched fuel mix
October Poses Little Challenge for MISO
MISO successfully managed an uneventful October that went from unseasonably warm to unusually chilly, the RTO reported at an Informational Forum.
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MISO to File Queue Changes Before Year-end
MISO will file a proposal to revise its interconnection queue process by implementing stringent site control requirements and increasing milestone payments.
MISO
Study: MISO Grid Needs Work at 40% Renewables
MISO will need to take significant steps to reinforce its grid to handle 40% renewable penetration.
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MISO Elects Lange to Board; Keeps 2 Incumbents
MISO membership re-elected Directors Phyllis Currie and Mark Johnson while also electing sitting Minnesota Public Utilities Commission Chair Nancy Lange.

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