Added as filed
Plymouth Township Data Center (MLP Ventures / Brian O'Neill)
MLP Ventures. Filed
King of Prussia developer Brian O'Neill, through MLP Ventures, is seeking a special exception from Plymouth Township's zoning hearing board to convert the shuttered 66 acre former Cleveland-Cliffs steel mill at 900 Conshohocken Road into a 2 million square foot, 10-building AI data center with its own on-site generators and gas turbines. O'Neill withdrew an earlier version of the application after a November 17, 2025 zoning board meeting, then resubmitted a nearly identical plan in May 2026 and separately filed a validity challenge arguing the township's zoning ordinance fails to provide for data centers. Evidentiary hearings continued through an October 16, 2026 session at which Montgomery County, owner of the adjacent former Ivy Rock Quarry property, won party status in the case, with the next hearing set for November 19, 2026.
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- Status
- Filed
- Operator
- Not disclosed
- Applicant on record
- MLP Ventures
- Location
- 900 Conshohocken Road, Conshohocken, PA 19428, Plymouth Township, Montgomery County, PA
- Size
- MW not reported, 66 acres, 2,000,000 sq ft
- Cooling
- Not reported
- Utility
- Not reported
- Next hearing
- November 19, 2026, Plymouth Township Zoning Hearing Board
- First reported
- 2025-09
- Last updated
- October 19, 2026
What happens next
Still to come: public hearings, a rezoning or permit vote, and a utility interconnection agreement.
Sources
- A Main Line developer is planning an AI data center outside Conshohocken. Within days, neighbors have rallied against it., The Philadelphia Inquirer, 2025-10-03
- Plymouth Township data center proposal sparks contentious zoning hearing, 6abc Philadelphia, 2026-10-16
- Plymouth Twp. Data Center Fight: 43 Conditions Rejected, MontCo.Today
- First Hearing Date Set For Plymouth Twp. Data Center Proposal, Patch
What it would mean nearby
The order is meant to keep new data centers from pushing their power costs onto residential electric bills by requiring developers to pay for all of their own electricity. This does not change anyone's electric rate directly, but it is meant to stop the cost of new substations and power lines built for data centers from being added to everyone else's bill. This is the overall statewide trend behind the individual utility price to compare increases: the average Pennsylvania household's total electric bill grew by roughly a fifth between 2024 and 2026.
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History
Other tracked projects within 25 miles
DaStor: 3400 Horizon Drive Operator not disclosed
Lumen Norristown Lumen Technologies
TierPoint Valley Forge TierPoint
Flexential Philadelphia - Collegeville Flexential
Terminal Commerce Building Operator not disclosed
Common questions
Where is the Plymouth Township data center?
It is in Plymouth Township, Montgomery County, PA.
Has the Plymouth Township data center been approved?
Not yet. An application has been filed and has not been decided.
How big is the Plymouth Township data center?
Reported size: 66 acres, 2,000,000 square feet.
When is the next public hearing?
November 19, 2026, Plymouth Township Zoning Hearing Board.
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