The South Carolina State Museum, located in Columbia, South Carolina, is the largest museum in the Southeastern United States. Positioned on an old shipping canal on the Congaree River that dates back to pre-Civil War times, the museum is widely recognized as a resource for South Carolina history and lifestyle. The museum opened October 29, 1988 and is housed in what it calls its largest artifact, the former Columbia Mills Building, listed on the National Register of Historic Places in 1982. When the mill opened in 1894, manufacturing cotton duck cloth (a canvas-like material), it was the first totally-electric textile mill in the world. It was also the first major industrial installation for the General Electric corporation. It is listed on the National Register of Historic Places. On certain levels of the museum, the original flooring has been kept intact, distinguishable by hundreds of textile brads and rings (that carried the threads during the spinning process) that became embedded in the floor while it was still being used as a mill.