Iron Mountain The Underground

Latest Podcast 1137 Branchton Rd
OperationalPlanned
Operational with future phases planned
Operated by:

Iron Mountain The Underground

Utility Provider: First Energy
Lot Size: 200 acres
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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 Keel Infrastructure: Scrubgrass AI Campus
Keel Infrastructure’s (formerly Bitfarms) flagship long-term development site is located on approximately 650–750 acres in Scrubgrass Township, Venango County, Pennsylvania.
13.55 miles Keel Infrastructure: Scrubgrass Mining
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
The walls still have rock walls
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

Operated by:

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.
43
Facilities
23
Markets
634MW
Megawatts

News See all

Read Iron Mountain Completes Structural Build of Chennai Data Center
Iron Mountain Completes Structural Build of Chennai Data Center

Iron Mountain Completes Structural Build of Chennai Data Center

April 13, 2026 Iron Mountain

Iron Mountain has topped out a new data center in Chennai, India.“We are thrilled to celebrate a recent major milestone in our global expansion: the official topping-out ceremony of our Chennai CHN-1 data center in Ambattur!” the company said on LinkedIn this week. “As the structural framework...

Read more
Read Iron Mountain Plans a Seven-building Data Center Campus Outside Austin, Texas
Iron Mountain Plans a Seven-building Data Center Campus Outside Austin, Texas

Iron Mountain Plans a Seven-building Data Center Campus Outside Austin, Texas

March 18, 2026 Iron Mountain

Iron Mountain is targeting a new data center development outside Austin, Texas. First reported by BizJournal, the company is targeting a campus outside the city of Hutto in Williamson County.The Hutto City Council last week reviewed a presentation from Iron Mountain on its Taylor Meadows data...

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Read Iron Mountain to convert records management facility in Miami to a data center
Iron Mountain to convert records management facility in Miami to a data center

Iron Mountain to convert records management facility in Miami to a data center

November 06, 2023 Iron Mountain

Iron Mountain is to convert one of its former records management facilities in Miami, Florida, into a data center that will offer 16MW. Iron Mountain CEO William L. Meaney said during the company's Q3 2023 earnings call last week, “Miami is a key market where a number of our customers are looking...

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Read Web Werks & Iron Mountain acquire 4 acres in Chennai for DC construction
Web Werks & Iron Mountain acquire 4 acres in Chennai for DC construction

Web Werks & Iron Mountain acquire 4 acres in Chennai for DC construction

October 17, 2023 Web Werks

Web Werks and Iron Mountain recently purchased a four-acre parcel of land in the Ambattur area of Chennai, India for the construction of two data center campuses. These parcel will support two buildings called CHE-1 and CHE-2 which will be built to Tier III standards and will support a total of...

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Read Iron Mountain signs 24/7 PPA for hydropower in US
Iron Mountain signs 24/7 PPA for hydropower in US

Iron Mountain signs 24/7 PPA for hydropower in US

July 04, 2023 Iron Mountain

Iron Mountain has signed a 24/7 PPA agreement with Rye Development, a US hydropower developer, for 150 ME of power over the next ten years from a number of the developer's low-impact hydroelectric projects. Rye Development seeks to integrate power generation capabilities into existing dams with...

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