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.
Project description
Constellation is restarting Three Mile Island Unit 1 in Middletown, Pennsylvania — an 837 MW, $1.6 billion project under construction, with the output contracted to Microsoft. Emerson is linked on the instrumentation side.
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
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