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December 22, 2025

Resource Adequacy

Resource adequacy is the ability of electric grid operators to supply enough electricity at the right locations, using current capacity and reserves, to meet demand. It is expressed as the probability of an outage due to insufficient capacity.
MISO, IMM Reach Compromise on Capacity Auction Design
MISO and its Independent Market Monitor have reconciled their differences and reached a compromise on the RTO's capacity market design.
OMS-MISO Survey: Generation Shortfall Possible
The MISO-OMS 2016 Survey found that plant retirements could cause a generation shortfall as early as 2018 in MISO, 2 years earlier than previously expected.
SPP Task Force Prepares to Hand off its Work
The SPP Capacity Margin Task Force conducted its penultimate meeting  as it continues to set up the stakeholder group that will replace it.
UPDATED: PJM Capacity Prices Fall Sharply
PJM Capacity prices fell sharply as new generation flooded the market, leaving 18 GW of existing resources without any capacity revenue.
ERCOT Briefs: Ample Capacity; Outage Procedures
ERCOT said continued growth in natural gas and renewable energy capacity will help it meet its projected summer peak this year.
SPP to Cut Planning Reserve to 12%, Reduce Capacity Needs by 900 MW
SPP members voted last week to reduce the RTO’s planning reserve margin to 12% from the current 13.6%.
MISO Delays Seasonal, Locational Capacity Constructs
MISO acknowledged that it missed its original goal of making a FERC filing in December, and now hopes for a May filing.
ERCOT: Ample Capacity to Meet Spring, Summer Peaks
ERCOT said it continues to expect to have sufficient resources to meet projected peak-demand during the spring and summer.
PJM-Type Capacity Auction for MISO Zone 4 Proposed
Dynegy and Exelon proposed that MISO Zone 4 procure capacity in three-year forward auctions separate from the rest of the RTO.
Reduced Reserve Margin Could Cut SPP Capacity Costs
Reducing SPP’s current 13.6% reserve margin to 12% could cut required capacity by about 1,000 MW, saving $86 million annually and $1.3 billion over 40 years.

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