The Mount Savage Iron Works operated from 1837 to 1868 in Mount Savage, Maryland. The ironworks were the largest in the United States in the late 1840s, and the first in the nation to produce heavy rails for construction of railroads. The works were established in an area adjacent to mines for coal, iron ore and fire clay. Facilities included blast furnaces, puddling furnaces, a rolling mill, iron refineries, coke production and brick production.