Homestead Steel Works was a large steel mill located on the Monongahela River at Homestead, Pennsylvania in the United States. Originally built for the Pittsburgh Bessemer Steel Company, the plant expanded rapidly following its purchase by Andrew Carnegie in 1883. Like the neighboring Edgar Thompson Works, it was supplied by tributary coal and iron fields, the Union Railroad 425 miles (684 km) long, and a line of lake steamships. The works also saw one of the most notable labor disputes in U.S. history, the Homestead strike of 1892. "Homestead 1889-1895".