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December 22, 2025

Transmission Planning

© RTO Insider LLC
Plan Seeks to Boost Prospects for New Transmission in the West

The Western Power Pool floated a plan to revamp transmission planning in the West to spur development of the kind of large-scale transmission projects FERC’s Order 1000 has failed to produce.

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Northeast Stakeholders Push Transmission Planning, Siting Reform

Speakers at Raab Associates’ New England Electricity Restructuring Roundtable emphasized the importance of transmission planning to ensure the grid can handle increased amounts of variable clean energy and higher demand from electrification.

CAISO
CAISO Proposal Seeks to Address Interconnection Backlog

As CAISO grapples with an “unprecedented” surge in interconnection requests, it has proposed prioritizing requests in zones where transmission capacity now exists or is under development.

MISO
MISO PAC Considers Lower, $9B MTEP 23 Transmission Package
The revised MTEP 23 plan dropped from $9.4 billion to $8.96 billion with the deferral of phase 3 of Entergy Louisiana’s Amite South reliability project.
Ameren Missouri
MISO May Use Inaugural Near-term Congestion Study to Plan Smaller Tx Upgrades
MISO’s exploratory study on alleviating near-term transmission congestion has led the RTO to consider adding near-term economic benefits to its existing long-term economic planning.
EDP Renewables
MISO Somewhat Open to COD Allowances in Interconnection Queue Rules
MISO signaled it's somewhat receptive to stakeholder ideas on loosening its commercial operation date deadlines in its generation interconnection queue.
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FERC OKs MISO Removal of Annual Reviews for Long-term Tx Projects
MISO is off the hook as far as having to conduct annual cost-benefit analyses for its major transmission projects, FERC has ruled.
Soltage
MISO Relaxes Proposal on Stricter Queue Ruleset
MISO has compromised with stakeholders on a few details in its proposal to downsize the number of projects allowed in its generator interconnection queue.
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New England TOs Propose Asset Condition Project Database

The New England Transmission Owners outlined a proposal for a new asset condition project database at ISO-NE’s Planning Advisory Committee.

NYDPS
NY Policy Council Holds Inaugural Meeting to Discuss CGPP
New York’s Energy Policy Planning Advisory Council met to discuss the Joint Utilities' Coordinated Grid Planning Process and review its current modeling assumptions with stakeholders.

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