Three Mile Island Restart
837 MW AI data center in Middletown, PA, United States — under construction.
- Capacity: 837 MW
- Location: Middletown, PA, United States
- Developer: Constellation
- Tenant: Microsoft
- Status: under construction
- Estimated cost: $1.6B
Three Mile Island Restart is a 837 MW AI data center project located in Middletown, PA, United States, currently under construction. It is being built by Constellation for tenant Microsoft. The estimated build cost is $1.6B. This project is one of thousands of data-center facilities tracked by Data Center Index across PA, United States — covering operational, under-construction, announced, and permitted sites.
Public companies linked to Three Mile Island Restart
Developers, tenants, and suppliers tracked by Data Center Index with exposure to this project:
- Constellation Energy (CEG) — developer · energy · high DC exposure
- Microsoft (MSFT) — tenant · hyperscaler
- Emerson Electric (EMR) — power management · power equipment · mid DC exposure
Related data center projects
- Calvert Cliffs Relicense — 1.8 GW, Lusby, MD, United States · operational
- Nexus Hubbard Campus — 7.2 GW, Hubbard, OH, United States · under construction
- Hyperion AI DC (Louisiana) — 5.0 GW, Richland Parish, LA, United States · under construction
- Microsoft Fairwater Wisconsin — 3.3 GW, Mount Pleasant, WI, United States · operational
- Nebraska Mega-Campus — 2.7 GW, Lincoln, NE, United States · announced
- AWS Project Rainier (New Carlisle, Indiana) — 2.4 GW, New Carlisle, IN, United States · operational
- Meta Hyperion — 2.3 GW, Holly Ridge, LA, United States · operational
- Diablo Canyon AI Integration Project — 2.3 GW, Avila Beach, United States · operational