U.S. Steel previously said it could not afford to keep operating its oldest mill near Pittsburgh, citing financial pressures and the cost of ongoing operations. According to reports, that plant had been considered on the brink of closure roughly two years ago. Since then, the ownership of U.S. Steel has shifted to Nippon Steel, which is now moving forward with a major renovation of the historic facility. The renovation is described as a significant investment aimed at modernizing and sustaining production at the site. While the earlier period focused on financial constraints and the possibility of ending operations at the mill, the current news centers on renewed plans to keep the plant running through upgrades rather than closure. The reporting frames the renovation as part of Nippon Steel’s broader approach to bringing the mill back into viability, though specific details on timelines, costs, or production targets are not included in the provided excerpts. Overall, sources agree on the key arc: the mill faced potential shutdown under U.S. Steel, and a new owner now undertakes a large renovation effort.