Mesta 160-Inch Plate Mill, Defense Plant Corporation, Homestead Works, Homestead, Allegheny County, PA

See also HAER PA-200-F for additional documentation. Includes photographs.
See also HAER PA-343 for related documentation. Includes written data.
Significance: Rated with an annual capacity of six hundred thousand tons, the 160" mill could produce plates of many types and sizes. Not limited to light-gauge carbon steel, the mill also produced alloy steels and heavy-gauge steel that required flame-cutting. Standard plate sizes ranged up to 720" in length, between 38 and 144 inches in width, and were typically between 3/16 and 1 1/2" in thickness. Although the 160" plate mill at Homestead contributed to the shipbuilding effort during World War II, its greater utility came during peacetime as a substantial addition to the industrial stock of the Pittsburgh region.
Unprocessed Field note material exists for this structure: N765
Survey number: HAER PA-301
Building/structure dates: 1941 Initial Construction
Building/structure dates: 1993 Demolished