Data center campus · 1137 Branchton Road, Boyers (former limestone mine), Butler County, Pennsylvania
Iron Mountain WPA-1 underground data center
Operating
as of Oct. 31, 2026
Iron Mountain runs a 330,000-square-foot data center 220 feet underground in a former limestone mine at Boyers in northern Butler County. Also known as: Iron Mountain WPA-1.
Power15.5MW reported · stated
Floor area330,000sq ft
Site315acres
Who is behind it
ProjectIron Mountain WPA-1 underground data centerAlso: Iron Mountain WPA-1
Developer and teamIron Mountain
End userNot found in the recordsNot yet named in any record or credited report we have found.
The record, newest first
Iron Mountain's page lists WPA-1 at 330,000 square feet and 15.5 MW, 220 feet underground on a 315-acre campus. (Iron Mountain, Oct. 31, 2026)
Iron Mountain's signing of a 10-year, 2.4 MW lease with an unnamed hyperscale enterprise software company at the Boyers site was reported. (Data Center Frontier, Aug. 9, 2021)
Conflicts and open questions
- Coordinates are approximate, for the village of Boyers (Marion Township, per OpenStreetMap); the street address did not geocode.
- Acreage differs: Iron Mountain says 315 acres; Data Center Frontier (2021) said 200 acres.
The full record
- Status note
- Listed by Iron Mountain as an operating underground data center.
- Power note
- 15.5 MW total capacity per Iron Mountain's page.
- Evidence
- Primary public records
- Size class
- Under 50 MW (outside main scope; kept for completeness)