U.S. Steel plans to invest up to $2.5 billion into upgrades at its Mon Valley Works complex near Pittsburgh, the steelmaking giant announced Monday, more than doubling its original cost estimate for the project.
The investment, backed by new owner Nippon Steel, will preserve roughly 3,000 jobs and replace an 87-year-old hot strip mill near Pittsburgh
Drew Angerer / Getty Images
U.S. Steel plans to invest up to $2.5 billion into upgrades at its Mon Valley Works complex near Pittsburgh, the steelmaking giant announced Monday, more than doubling its original cost estimate for the project.
The investment is part of U.S. Steel's broader commitment to spend $11 billion across its domestic operations by 2028, following its acquisition by Tokyo-based Nippon Steel last year. The company had originally pledged $1 billion toward Mon Valley Works.
At the heart of the plan is a new hot strip mill to be built at the Edgar Thomson plant in Braddock, Pennsylvania. It will replace an 87-year-old mill at the nearby Irvin plant in West Mifflin and will allow the facility to produce steel for the automotive industry and other high-strength products that Mon Valley "cannot competitively produce," according to materials the company shared with community leaders. The new mill will be capable of producing up to 3.5 million tons of sheet steel annually, up from the current 2.2 million tons, according to The Wall Street Journal. Construction is expected to begin later in 2026 and last about three years.
Parker Strategy Group, a consulting firm based in Philadelphia, released an economic impact report Monday estimating that the project would pump $1.7 billion into Pennsylvania's economy and yield as much as $58 million in state and local tax receipts across a three-year span. According to the report, about 3,000 existing jobs at Mon Valley Works would be retained, while an additional 3,200 indirect and induced positions would be added over that same window.
"The Mon Valley Works is where the American steel industry was first forged, and this investment is proof that its best days are still ahead," U.S. Steel President and CEO David Burritt said in a statement.
Burritt debuted the plan at a press conference Monday alongside Secretary of Commerce Howard Lutnick, whom Burritt credited with facilitating Nippon's acquisition. The roughly $15 billion transaction was ultimately finalized under President Trump, after Biden had used an executive order near the end of his term to halt it on national security grounds. Under the terms negotiated with Washington, the arrangement gives the White House the power to block decisions such as shuttering facilities or shifting production abroad, with a mechanism known as a "golden share" extending that authority to future presidents as well. Lutnick said at the conference that he does not expect the government will need to exercise those rights.
The spending plan does not appear to direct any funds toward either the Irvin works or the Clairton Coke Works. Clairton was the scene of a deadly blast last year that claimed two lives and sent 10 other workers to the hospital.
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