Sparks Shot Tower
The Sparks Shot Tower is a historic shot tower located at 129-131 Carpenter Street in Philadelphia, Pennsylvania. Opened on July 4, 1808, it was one of the first shot towers in the United States, with the Jackson Ferry Shot Tower in Wythe County, Virginia possibly predating it by a year or so. It was built near the Delaware River waterfront at Front and Carpenter Streets, just west of Gloria Dei (Old Swedes') Church. History. Supplies of lead shot were imported from Europe before the Embargo Act of 1807. Plumbers Thomas Sparks, John Bishop, and James Clement  built the tower to take advantage of the limited available supply. At the start of the War of 1812, the federal government became their major customer, buying war munitions, and Quaker John Bishop sold his part of the company to Thomas Sparks. Before the use of shot towers, shot was made in wooden molds, which resulted in unevenly formed, low quality shot. Shot towers work on the principle that molten lead forms perfectly round balls when poured from a high place. Molten lead at the top of the tower was poured through a sieve or mesh, forming uniform spherical shot  before falling into a large vat of water at the bottom of the tower. The tall brick tower is in diameter at its base, tapering to at the top. Originally used to produce shot for hunters, the tower produced ammunition during the War of 1812 and the Civil War. The tower operated for over a century, closing in 1913. Four generations of the Sparks family owned the tower until 1903, when they sold it to the United Lead Company of Pennsylvania. The City of Philadelphia bought the site in 1913. The tower is now managed by the Philadelphia Department of  Parks and Recreation and is surrounded by a public recreation center and playground. It can be seen looking west from I-95.