Data center at former steel mill, 900 Conshohocken Road (Plymouth Township)
Developer Brian O'Neill (MLP Ventures) wants to turn the closed Cleveland-Cliffs steel mill at 900 Conshohocken Road into a data center of about 2 million square feet. His first application was withdrawn in 2025, but he refiled in 2026 and zoning hearings are under way.
Where things stand: First application was withdrawn in Nov. 2025, but the developer refiled in May 2026. Zoning Hearing Board hearings began June 25, 2026 and continued in August; no decision yet.
🕒 Latest update (Aug 6, 2026): Zoning Hearing Board hearing at Colonial Middle School ended without a decision; more sessions planned.
What we know
- 📍 Where900 Conshohocken Road (former Cleveland-Cliffs steel mill site), Plymouth Township, Montgomery County
- 🏢 CompanyMLP Ventures (Brian O'Neill)
❓ Still unanswered
Nobody has answered these in public yet. Can you help find out?
- Could it be refiled? 🙋 I'll find out
- Will the nearby county-owned quarry be sold to a data center developer? 🙋 I'll find out
What happened so far
- Nov 17, 2025First application withdrawn at the zoning board because the developer's sale agreement was not final.
- May 2026Developer resubmitted plans for a data center using 10 existing buildings.
- June 9, 2026Township council released a statement; zoning hearing board hearing set for June 25.
- Aug 6, 2026Zoning Hearing Board hearing at Colonial Middle School ended without a decision; more sessions planned.
Local votes and rules
✅ Approved
A developer is asking the Plymouth Township Zoning Hearing Board for a special exception to turn the closed Cleveland-Cliffs steel mill on Conshohocken Road into a 2 million-square-foot AI data center. An earlier request was withdrawn in November 2025 over a legal standing problem. Hearings on the new request began in summer 2026 with no decision yet.
Drag the slider to compare the land before and now.
Where this comes from
- Plymouth Township's council released a statement on data center application · MoreThanTheCurve · June 11, 2026
- Plymouth Township Data Center (former Cleveland-Cliffs steel mill site) · More Than Just Parks Data Center Tracker
- PA DEP Data Center Permit Tracker · Pennsylvania DEP · Oct 6, 2026
- Rowdy residents at Plymouth Township zoning meeting draw rebukes as they push back on big data center plan · The Philadelphia Inquirer · Aug 7, 2026
- Legal issues force developer to withdraw data center proposal in Plymouth Township, Pennsylvania · DatacenterDynamics · Nov 2025
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