U.S. Secretary of Energy Chris Wright on Nov. 25 issued an emergency order directing the PJM Interconnection, in coordination with Constellation Energy, to ensure Units 3 and 4 of the Eddystone Generating Station in Pennsylvania remain available for operation.
“The production of electricity from the units will continue to be critical to maintaining reliability in PJM over the coming winter months,” DOE said.
Wright ordered that the two Eddystone Generating Station units remain online past their planned retirement date in a May 30, 2025 emergency order.
Keeping these units operational over the summer strengthened energy security in the PJM region, as demonstrated when PJM called on the Eddystone Units to generate electricity during heat waves that hit the region in June and July, DOE said. A subsequent order was issued on August 28, 2025.
PJM’s service area will continue to face emergency conditions both in the near and long term. In January 2025, PJM reached a new record peak for winter demand, exceeding the previous winter peak set in 2015, DOE said.
This order is in effect beginning on November 26, 2025, and continues until February 24, 2026.
Eddystone Generating Station is owned and operated by Constellation. It is a six-unit, 820-megawatt power plant, located on the Delaware River in Eddystone, Pennsylvania, just south of Philadelphia.
Eddystone Units 3 and 4, each with 380 MW capacity, are subcritical steam boiler-turbine generator units that can run on either natural gas or oil, depending on market conditions. These units were installed between 1967 and 1970.
Units 10 and 20 and 30 and 40, with a total combined capacity of 60 MW, are pairs of oil fueled peaking units that run during periods of high demand. These units were installed in 1967 and 1970, respectively.
