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December 18, 2025

Transmission

© RTO Insider 
PJM Selects 51 Projects for Expedited Interconnection Studies
PJM selected 51 projects to receive expedited interconnection studies through its Reliability Resource Initiative, adding 11,793 MW of nameplate capacity to the next study cycle.
© RTO Insider
State Officials in the Northeast Discuss Interregional Transmission Plan
Officials from members of the Northeast States Collaborative on Interregional Transmission expounded the group’s strategic action plan.
KSLA News 12
SPP Addresses 3rd Load Shed Since March 31
SPP told its state regulators and board members that it will do better after three local load sheds since March 31, affecting a combined 54,000 customers.
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 
FERC Accepts ISO-NE Compliance Filing on Interconnection O&M Costs
FERC has accepted a compliance filing by ISO-NE and the New England transmission owners eliminating interconnection customers’ responsibility to pay for operations and maintenance costs on interconnection network upgrades.
IESO
IESO Tweaks Modeling for Outage Management

IESO is changing how it projects renewable generation output and its accounting for imports and planned loads in the forecasts it uses to manage generator and transmission outages.

© 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.
Shutterstock
NRECA Legislative Fly-in Focuses on Permitting, Meeting Demand

The National Rural Electric Cooperative Association has flown 2,000 member representatives into D.C. to lobby congressional leaders on key priorities for the nation’s co-ops, which this year include passage of permitting legislation and meeting rising demand.

The Brattle Group
Plan Lays out Steps for State-led Interregional Transmission in Northeast
The Northeast States Collaborative on Interregional Transmission released a strategic action plan for creating an interstate planning process for transmission projects that span the seams of their grid operators.
CAISO
CPUC, Others Question Details of EDAM Congestion Revenue Proposal
Stakeholders and state energy officials continue to raise concerns about a draft proposal that would adjust how congestion revenues are allocated in CAISO's EDAM, with the ISO aiming for a vote on the final plan in the coming weeks.

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