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Pennsylvania Extends Its Two Largest Coal Plants Four Years Past Retirement — Shapiro Explicitly Cites Data Center Demand
PA
Energy / Environmental / Data Centers
April 23, 2026
Source: Pennsylvania Capital-Star (States Newsroom)
Pennsylvania's Department of Environmental Protection has proposed a consent decree that would allow the commonwealth's two largest coal-fired power plants — the Keystone Generating Station in Armstrong County and the Conemaugh Generating Station in Indiana County — to continue operating through 2032, four years past their previously planned end-of-2028 retirement. In exchange, the plants' owners agreed to upgrade ash-handling and heavy-metals wastewater controls by 2028.
The plants' consortium owner, Key-Con Operating LLC (Houston-based Talen Energy plus private-equity partners), announced in 2021 it would stop burning coal at the two stations by the end of 2028, citing the long-term outlook for the wholesale electricity market at the time. Since then, PJM Interconnection has forecast peak demand across its 13-state footprint to grow by nearly 17% by 2035, and capacity-auction prices have spiked — outcomes Key-Con and the administration now cite as the economic rationale for keeping the plants online.
Gov. Josh Shapiro (D), in the statement accompanying the proposed decree:
> “This deal ensures reliable and affordable electricity for hundreds of thousands of homes and businesses as the planned development of data centers causes the supply to tighten."
President Trump took credit on Truth Social. Environmental advocacy groups called the proposal a “bailout” issued during Earth Week. The Clean Air Council's executive director, Alex Bomstein: “Key-Con had years to comply with federal wastewater rules, and now the state is extending the lives of aging coal plants while cutting the lives short of people living nearby.” PennEnvironment's David Masur: “These plants were slated to close because it didn't make economic sense to do the upgrades and keep them open."
What makes this a turning point rather than another coal-extension story is the explicit framing. Shapiro did not cite reliability concerns in general, capacity-market dynamics, or a gap in forecast resource adequacy. He cited data center demand — by name — as the justification for keeping two coal plants running past their planned retirement. That is the first time a sitting governor of a major energy-producing state has attached a specific data-center rationale to a specific baseload-retirement reversal in a consent decree.
The plants:
- Keystone Generating Station — straddles Plumcreek Township (Armstrong County) and Armstrong Township (Indiana County). Opened 1967. Two generating units, more than 1.7 gigawatts total. One of the largest coal-fired plants in PJM.
- Conemaugh Generating Station — West Wheatfield Township, Indiana County. Opened 1970. Two generating units, more than 1.7 gigawatts total. Same scale, neighboring county.
Combined nameplate: more than 3.4 gigawatts — enough annual generation, at capacity factors typical for PJM coal, to power roughly 1.5 to 2 million average U.S. homes per year (using the U.S. Energy Information Administration's residential-consumption benchmark of about 10,500 kilowatt-hours per home annually, and assuming a 55–65% capacity factor for the two plants). That is about four times the electricity the undamaged reactor at Three Mile Island produced before going offline in 2019. In the load-profile terms relevant to this story, it is enough baseload to serve three to six hyperscale data centers of the 500–1,000 MW class being proposed across the Mid-Atlantic.
Worth noting on the regional comparison: Microsoft's 2024 agreement with Constellation Energy to restart Three Mile Island was originally slated for 2027 commercial operation. PJM warned Constellation last month the reconnection timeline may slip to 2031. That four-year delay on a single nuclear restart is part of the supply-side gap that is now being closed with coal extension.
The DEP filed its motion seeking judicial approval of the consent decree Tuesday in Indiana County Court of Common Pleas. Because the settlement is structured as a Clean Water Act consent decree rather than a legislative action, the venue is the agency and the court — not Harrisburg — and the upcoming public comment window is the formal opportunity to put views on the record.
What You Can Do
If you live in Pennsylvania:
- Pennsylvania Department of Environmental Protection (DEP) is the lead agency. The public comment period on the Keystone/Conemaugh consent decree will be announced in the Pennsylvania Bulletin once the proposal is formally docketed. The Bulletin is at pabulletin.com; DEP public comment procedures are at dep.pa.gov.
- Environmental Hearing Board — the venue where Clean Water Act permit decisions can be appealed in Pennsylvania. ehb.courtapps.com.
- Indiana County Court of Common Pleas — the DEP filed its motion for judicial approval there. Court schedules are available at the county's website.
- Contact the Governor's office at governor.pa.gov. The justification language ("data centers causes the supply to tighten") is now the administration's stated public position; the Governor's office accepts input from constituents on either side of the decree.
- Your state senator and representative can be contacted about coal-retirement reversals tied to data-center demand, particularly ahead of next year's legislative session. Find your legislators at legis.state.pa.us.
If you live in a state with coal plants approaching retirement:
The Keystone/Conemaugh precedent establishes a transferable structure. Two documents to watch for in your state: (1) the utility's integrated resource plan (filed with your state PUC, typically every 2–3 years) and (2) any consent decree or settlement between the state environmental agency and a coal-plant owner regarding wastewater, ash, or air permits. If either document begins citing data-center-driven demand, the Pennsylvania pattern is being considered.
If you're evaluating a similar proposal in your own state:
The tradeoff being proposed is specific and worth reading closely: environmental upgrade commitments (here, ash-handling and wastewater controls by 2028) in exchange for additional runtime (here, four years past the previously planned retirement). Whether the tradeoff holds depends on the details — what emissions are or are not reduced, what wastewater thresholds are met, and what the extended-operation period contributes to local air quality, water quality, and grid supply. The Pennsylvania decree provides a template for the kind of terms that are on the table; the local assessment of whether the terms are reasonable is separate.
Community Takeaway
This is the first explicit data-center-driven coal-retirement reversal in a major state. Until this week, coal-plant extensions had been justified on generalized reliability grounds — capacity-market tightness, resource-adequacy concerns, summer-peak uncertainty. Shapiro's statement on Keystone and Conemaugh names data centers directly, which is a new element in the public record.
The pattern it establishes is transferable. Any state still operating coal units with planned retirement dates in the late 2020s or early 2030s — including Indiana, Kentucky, Missouri, North Dakota, Ohio, West Virginia, and others — now has a worked example of how an extension can be negotiated: a consent decree built around environmental-compliance upgrades, traded for extended runtime, structured to moot pending litigation, and framed around data-center demand. Utilities, regulators, and advocacy organizations on all sides of the question will be reading it for transferable structure.
For residents near any plant that could be subject to a similar proposal, the process is mostly procedural. Clean Water Act consent decrees carry public comment windows; air-permit revisions tied to extended operation have their own comment processes; and the state-court venue where the decrees are approved (Indiana County Court of Common Pleas, in Pennsylvania's case) is where the record is formally settled. These are the venues where evidence on local air quality, water quality, and community health — whatever the community's position — is preserved for future reference.
The data-center demand argument — that the electricity has to come from somewhere — is factually true. The open question is how much of the answer should be extended combustion versus accelerated replacement, and which venue is best positioned to settle that question for each specific plant. Pennsylvania's decision on Keystone and Conemaugh is now part of the record every other state will reference when the same question arrives on its own desk.
Source: Pennsylvania Capital-Star (States Newsroom), April 23, 2026.