U.S. Steel Clairton Plant (Mon Valley Works)
U.S. Steel, Clairton, Pennsylvania
U.S. Steel's Clairton Plant on the Monongahela River south of Pittsburgh is the largest coke plant in the United States, making about 3.6 million tons of coke a year in six batteries. Its coke feeds the Edgar Thomson blast furnaces, Gary Works and outside buyers. It is part of the four-plant Mon Valley Works.
- Company
- U.S. Steel
- Status
- Operating
- Opened
- Not stated
- Employees
- Not stated
- Industry
- Steel and metals
- Revised
- November 12, 2026
What is made here
Metallurgical coke for steelmaking, supplied to U.S. Steel mills and the commercial coke market.
Facts
| Scale | Largest coke manufacturing facility in the U.S., with six coke oven batteries producing about 3.6 million tons of coke a year (company: monvalley.uss.com) |
|---|---|
| Customers | Supplies the commercial coke market, the Edgar Thomson Plant and U.S. Steel's Gary, Indiana facilities (company: monvalley.uss.com) |
| Location | About 20 miles south of Pittsburgh on the west bank of the Monongahela River (company: monvalley.uss.com) |
| Mon Valley Works | One of four Mon Valley Works plants with Edgar Thomson (steelmaking), Irvin (sheet rolling) and Fairless (galvanizing); coke oven gas is recycled to power Mon Valley operations (company: monvalley.uss.com) |
Figures are as stated by the source named next to each one. Company figures are the company's own claims.
Can you visit?
We haven't found a public tour of this factory. See factory tours in Pennsylvania.
Sources
- U.S. Steel: Mon Valley Works (company, checked November 12, 2026)
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