U.S. Steel Mon Valley Works - Irvin Plant
Large load · West Mifflin, PA
The Irvin Plant in West Mifflin, Pennsylvania is a U. S. Steel secondary steel processing facility that rolls and treats steel slabs produced at the nearby Edgar Thomson Plant. It is supplied by a Mon Valley power grid owned and operated by U. S. Steel.
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Overview
Irvin Plant rolls and treats steel slabs produced at the nearby Edgar Thomson Plant to meet customer specifications. The finishing processes include hot and cold rolling, continuous pickling, annealing, and galvanizing. Major sheet products include hot-rolled, cold-rolled, and coated sheet. The site consists of 650 acres, 51 acres under roof.
Profile
- Electricity and grid
- The Edgar Thomson facility has two generators that together produce about 1,500 MWh daily, and the rest beyond what Edgar Thomson uses is fed to the Mon Valley power grid, owned and operated by U. S. Steel, supplying energy to the Irvin and Clairton facilities. U. S. Steel's coke oven gas pipeline distributes extra gas from Clairton to the Irvin and Edgar Thomson facilities as fuel. Mon Valley was an HVPS customer of Duquesne Light Company before POLR III rates and has more recently purchased electricity from an alternative energy supplier.
- Ownership and permits
- United States Steel Corporation owns and operates the Irvin Plant. Nippon Steel and U. S. Steel finalized their partnership on June 18, 2025. The plant operates under Allegheny County Title V Operating Permit No. 0050-OP24 and NPDES permit PA0004073.
Facility
- Activity
- Secondary steel processing: hot and cold rolling, pickling, annealing and galvanizing
- Industry
- Manufacturing
- Site type
- Facility
- Operating status
- Operating
Permits and agreements
- Permit
- Allegheny County Title V Operating Permit No. 0050-OP24
- Permit
- NPDES permit PA0004073