銑鉄
The Chester Rolling Mill was established on the site of an old bridge and steel works at the foot of Wilson and Hayes Sts., Chester, incorporating the area between Townsend to Highland Ave., and from Front St. to the Delaware River. Construction of the main rolling mill, a building with dimensions of 160 x 185 feet, began in 1875. In 1879, the building was doubled in size, from 160 to 320 feet. Initial output was 700 tons of pig iron and 300 tons of iron ship plate. Pig iron, beams, and hull and boiler plates were produced both for Roach's main shipyard in Chester and for his other shipbuilding facility, the Morgan Iron Works in New York City.