# U.S. Steel to build $3 billion hot strip mill at Mon Valley Works in Pennsylvania

U.S. Steel announced a nearly $3 billion investment to build a new hot strip mill at its Mon Valley Works – Edgar Thomson Plant in Braddock, Pennsylvania. The project will increase annual production capacity from 2.2 million tons to 3.5 million tons, with production expected to ramp up in late 2029.

- Type: Expansion
- Announced: 2026-11-04
- Where: Braddock, Pennsylvania, United States
- Value: $3.00B
- Starts operating: Q4 2029
- Status: announced
- Capacity: 3.5 million tons per year (up from 2.2 million)
- Products: hot rolled steel
- Sectors: [Steel and Metal Products](https://endata.com/sectors/steel-metal-products.md)

## Companies

- [U.S. Steel](https://endata.com/companies/15752.md)
- [Nippon Steel](https://endata.com/companies/7455.md) (investor)

## Sources

- [civmetrics.com](https://civmetrics.com/industrial-development/u-s-steel-to-build-a-3-billion-hot-strip-mill-in-pennsylvania-generate-58-million-in-tax-revenue/), 2026-11-04: "U.S. Steel will invest nearly $3 billion in a new hot strip mill at its Mon Valley Works – Edgar Thomson Plant in Braddock, Pennsylvania, the company said Thursday."

---
Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.