Pitt researchers propose using abandoned PA mines for data centers

A new proposal suggests using abandoned mines in Pennsylvania as homes for data centers. The idea was first floated by researchers at the University of Pittsburgh, who argue that the cool, stable temperatures underground could reduce cooling costs and the need for water. The plan would repurpose thousands of acres of derelict mine sites that have long been a blight on the local landscape.

Data centers are a growing source of global energy use, accounting for about 1% of worldwide electricity consumption. In the United States, the industry has added more than 100 new facilities in the last decade, with Pennsylvania emerging as a hotspot because of its cheap power and existing grid capacity. However, local residents often oppose new centers, citing noise, air pollution, and the loss of open land. The abandoned mine proposal seeks to address those concerns by relocating the bulk of the energy-intensive cooling systems underground, where the ambient temperature stays around 55 °F year‑round.

The mines themselves offer several advantages. They already have extensive underground networks and are built to withstand seismic events. Engineers estimate that a data center in a mine could cut cooling energy use by up to 70% compared to a surface‑level facility. The project would also tap into Pennsylvania’s abundant hydroelectric and solar resources, potentially powering the centers with renewable energy and reducing the carbon footprint. Critics worry about groundwater contamination and the cost of retrofitting old infrastructure, but preliminary studies suggest that the environmental risks can be managed with modern sealing techniques.

The next step for the proposal is a feasibility study funded by a joint venture between the state government and a private technology firm. The study will map suitable mine sites, estimate construction costs, and model energy savings. If successful, a pilot data center could open by 2028, offering a blueprint for other states with abandoned mines. The project could transform a long‑standing environmental liability into a climate‑friendly technology hub, demonstrating how old infrastructure can be repurposed for a greener future.