Limerick Township, Montgomery County
Constellation plans to add about 348 megawatts at the Limerick Generating Station, sold to Google under a 20-year power purchase agreement announced October 6, 2026.
Earlier uprates: the Nuclear Regulatory Commission approved 5 percent stretch uprates at Unit 2 in February 1995 and Unit 1 in January 1996, and 1.6 percent measurement uncertainty recapture uprates at both units in April 2011. July 15, 2025: at the Pennsylvania Energy and Innovation Summit, Constellation said it was working to secure customer commitments to add 340 megawatts at Limerick and planned to run the plant well into the 2040s. The project has been described as a $2.4 billion investment supporting about 3,000 jobs a year, contingent on customer commitments. January 6, 2026: the commission approved Limerick's $167 million digital modernization project, part of what Constellation calls a $5.1 billion Pennsylvania investment to preserve nearly 5,100 megawatts and add 1,200 more. October 6, 2026: Constellation and Google announced the 20-year agreement covering Limerick (about 348 megawatts) and Salem (about 97 megawatts) among 890 megawatts of uprates, plus a separate 15-year supply deal for 2,700 megawatts from the existing fleet. Adjacent to P019 'Project Laurel.'
Across the six plants in the Google program, Constellation says the agreement sustains about 4,400 existing jobs and creates about 7,200 temporary construction jobs; it hasn't broken out Limerick's share. The plant already employs 742 people, according to Constellation's fact sheet.
Constellation EnergyLimerick draws its cooling water from the Schuylkill River, according to Constellation. The uprate announcements we reviewed don't say whether more output would change river withdrawals or heat discharge.
Constellation EnergyConstellation and Google say Google is paying for the 890-megawatt uprate program under a 20-year agreement, which they describe as a response to PJM's Bring Your Own Power proposal that avoids passing costs to residential customers. The added Limerick output goes onto the PJM grid, which serves 67 million people.
Constellation EnergyRunning at a higher power level requires a license amendment and safety review by the Nuclear Regulatory Commission. As of September 15, 2026 the commission listed no uprate applications under review anywhere in the country.
U.S. Nuclear Regulatory CommissionIn Pennsylvania, the local zoning ordinance sets the route. A conditional use is decided by the elected governing body (supervisors, commissioners or council). A special exception or variance, and an appeal of a zoning officer’s decision, go to the Zoning Hearing Board. Each is a public hearing on a record: affected neighbors can ask for party status, cross-examine witnesses, and appeal. Municipalities can also adopt data center ordinances with enforceable standards.
Know your rights →Organized community opposition is the single most effective check on these projects in Pennsylvania. Show up to hearings, submit comment when it is taken, support legal and expert-witness costs, and press your municipality for a real ordinance. Pennsylvania municipalities cannot simply freeze applications, but a curative amendment under the Planning Code gives them a defined window to fix a defective ordinance.
How communities push back →