Iron Mountain The Underground

Latest Podcast

1137 Branchton Rd

OperationalPlanned

Operational with future phases planned

Pittsburgh

Metro
Pennsylvania

State
Northeast US

Region
United States

Country
North America

Region
Americas

Region

Iron Mountain The Underground

Utility Provider: First Energy

Lot Size: 200 acres

Total Power

SqFt

Gross Colocation Size

The Iron Mountain Data Center is located 220 feet underground this is a 145 acre former limestone mine.

200-Acre Iron Mountain-Owned Underground Campus
220-Feet Below the Surface
Consistent Delivery of Turnkey Data Center Space
N+1 Electrical Systems (A/B paths - cabinet through generator)
N+1 Mechanical and Cooling
Limestone Slab Nearly Unlimited Floor-Load Weight Limit
High-Density Ready (up to 20 kW per cabinet/rack)
100% Usable Computer Room Space - No Infrastructure in Room
Custom Hot/Cold Aisle Containment Solutions Available
Powered by 100% Renewable Energy
Natural, Geothermal Cooling Reduced Energy Consumption

Operational and expansion costs are much lower than most above-ground facilities. The data center pumps 53-degree water from an underground aquifer to cool its systems.

The mine has two major substations underground that draw power from West Penn Power's grid network. At full capacity, the Iron Mountain data center could span 500,000 square feet of space and could consume roughly 40 megawatts of power.

Map and Nearby Locations:

1137 Branchton Rd

Iron Mountain Sites

Nearby Facilities

Sites within 15 miles of Iron Mountain The Underground

Distance	Site	About
13.43 miles	Crypto Mining Data Center Request Dataset	The Scrubgrass site was acquired from Stronghold Digital Mining in 2025.
15.91 miles	DQE Communications Buttler

Iron Mountain The Underground Data Center Photos (See all)

Entrance to the Underground Data Center

Source: IRM

NOC at WPA-1

Source: Baxtel

The walls still have rock walls

In this photo taken Dec. 14, 2016, overhead pipes carry water from an underground reservoir to help cool the data center systems at Iron Mountain's underground data center in Butler County, Pennsyl...

Overhead pipes carry water to cool the data center

Source: DARRELL SAPP, Pittsburgh Post-Gazette

In this photo taken Dec. 14, 2016, overhead pipes carry water from an underground reservoir to help cool the data center systems at Iron Mountain's underground data center in Butler County, Pennsylvania.

Operating Company

Iron Mountain Data Centers is the data center business of Iron Mountain Incorporated and operates sites in the United States and Europe, with an India platform built through its partnership with Web Werks. In January 2018 it closed the acquisition of IO Data Centers, adding facilities in Phoenix and Scottsdale, Arizona, Edison, New Jersey, and Columbus, Ohio. In May 2018 it acquired EvoSwitch Netherlands, expanding into the Amsterdam market, and in 2019 it added capacity in Amsterdam and London. In India, Iron Mountain formed a joint venture with Web Werks in 2021 and in April 2025 it announced full ownership and a rebrand to Iron Mountain Data Centers India. Iron Mountain Incorporated was founded in 1951.

Iron Mountain Data Centers History:

In April 2025, acquired the remaining stake in Web Werks and rebranded the India business to Iron Mountain Data Centers.
2021: Formed a joint venture with Web Werks to develop and operate data centers in India.
May 2018: Acquired EvoSwitch Netherlands, expanding into the Amsterdam market.
January 2018: Closed the acquisition of IO Data Centers’ U.S. operations.
1951: Iron Mountain Incorporated was founded.