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Contested

York 2 Energy Center Data Center

Peach Bottom Township, York County

Energy Capital Partners said in July 2025 it would build a $5 billion data center at Calpine's 828 megawatt York 2 gas plant in Peach Bottom Township, York County, but the township says no application has been submitted, and the plant's new owner is required to sell it.

ContestedCo-located GasGreenfieldS Central
At a glance

The project by the numbers

StatusProposed
Capacity828 MW
Capex$ 5 B
First announced2025-07-15
Target onlineTBD

A $5 billion data center was announced at the York 2 power plant, but nothing has been filed and the plant is being sold

The number that mattersYork 2 produced about 5.48 million megawatt-hours of electricity in 2025, according to Calpine's annual report.
Developer
Energy Capital Partners announced the project through Calpine, which owned York 2. Constellation Energy bought Calpine on January 7, 2026, and must sell York 2 under the Justice Department's merger terms. Constellation announced on March 18, 2026 that it agreed to sell five PJM plants, Bethlehem, York 1, York 2, Hay Road and Edge Moor, to LS Power for $5 billion, with closing expected later in 2026 subject to regulatory approvals. It hasn't said what that means for the data center plan.
Tenant
Not disclosed. No end user has been named publicly.
Current stage
Announced in July 2025, with no application filed. Peach Bottom Township confirmed at its August 5, 2026 hearing that no formal data center proposal or application had been submitted, and it adopted data center zoning rules that night.
Decision body
Peach Bottom Township Zoning Hearing Board, which would decide any special exception under Ordinance No. 2026-02, and the Board of Supervisors for any rezoning. The township says water withdrawals from the Susquehanna River and electric rates are regulated by state agencies.
Top issues
Water use and groundwater, noise, diesel backup generators and air quality, electric rates, farmland preservation, traffic, setbacks from homes and schools, and how little has been disclosed about the project or its end user.
Key opponents
No organized opposition group has been reported. At the township's August 5, 2026 hearing, residents raised concerns about water use and groundwater, noise, electric rates, diesel generators, farmland, traffic and proximity to homes and schools.
Key supporters
York County President Commissioner Julie Wheeler called the announcement 'huge news for York County,' and York County Economic Alliance President and CEO Kevin Schreiber called it 'a massive investment in York County's economy.'

How we got here

Energy Capital Partners announced the $5 billion data center at Calpine's York 2 Energy Center on July 15, 2025, at the Pennsylvania Energy and Innovation Summit, and the York County Economic Alliance put construction employment at about 2,500 jobs. The 828 megawatt dual-fuel combined-cycle plant sits in the same township as the Peach Bottom nuclear station. Township supervisors said on November 5, 2025 and January 5, 2026 that no one had contacted or filed anything with the township. Constellation completed its purchase of Calpine on January 7, 2026, under federal terms that require selling York 2, and reported agreeing in March 2026 to sell five PJM plants to LS Power. Meanwhile the township wrote data center rules: the planning commission forwarded a draft on March 17, 2026, York County planners reviewed it in April and May, and supervisors adopted Ordinance No. 2026-02 on August 5, 2026.

What is at stake

Impacts raised and open questions

Water

Medium

Under the township's 2026 ordinance, a data center here couldn't use well water for cooling; cooling water would have to come directly from the Susquehanna River, with a water feasibility study, baseline testing of nearby private wells, and Susquehanna River Basin Commission approval above set thresholds. Residents raised groundwater depletion at the August 5, 2026 hearing.

Peach Bottom Township

Noise and vibration

Medium

The ordinance caps the 24-hour average sound level (with evening and night penalties) at 58 dBA at the boundary of any property with a home, school or similar sensitive use, and 70 dBA at other developed property.

Peach Bottom Township

Visual and light

Medium

The ordinance limits buildings to 60 feet, requires 200-foot setbacks from all property lines and 1,000 feet from sensitive uses, and calls for earthen berms at least 30 feet high next to sensitive uses.

Peach Bottom Township

Jobs and tax claims

Medium

The York County Economic Alliance put construction employment at about 2,500 jobs; no permanent job count has been published.

Central Penn Business Journal
Timeline

How it has unfolded

  • 2025-07-15Energy Capital Partners announced a $5 billion data center at Calpine's York 2 Energy Center during the Pennsylvania Energy and Innovation Summit. Central Penn Business Journal
  • 2025-11-05Supervisors said they hadn't been contacted about the data center and had no data center ordinance. Peach Bottom Township
  • 2026-01-05Supervisors said no information about a data center had been submitted to the township. Peach Bottom Township
  • 2026-01-07Constellation completed its roughly $22 billion acquisition of Calpine, under federal terms requiring it to sell York 2. U.S. Securities and Exchange Commission (EDGAR)
  • 2026-03-17The planning commission voted 7-0 to forward a draft data center ordinance to the supervisors. Peach Bottom Township
  • 2026-04-01Supervisors sent the draft data center ordinance to the York County Planning Commission for review. Peach Bottom Township
  • 2026-05-11Constellation's quarterly report said it agreed in March 2026 to sell five PJM plants it must divest to LS Power for $5.0 billion. U.S. Securities and Exchange Commission (EDGAR)
  • 2026-06-03Supervisors voted to advertise the data center ordinance for a public hearing in August. Peach Bottom Township
  • 2026-08-05After a public hearing, supervisors adopted Ordinance No. 2026-02 regulating data centers by a 3-0 vote. Peach Bottom Township
  • 2026-08-06Constellation said it expects the LS Power plant sales to close by the end of 2026, subject to regulatory approvals. U.S. Securities and Exchange Commission (EDGAR)
News

Coverage of this project

Sources

Know your rights

In 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 →

Take action

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 →