Built in 1813, the Casselman River Bridge was the largest single-span stone bridge in America. Its high arch was designed to facilitate riverboat traffic on the proposed C&O Canal, but because of the emerging railroad industry in the nineteenth century, the canal was never extended beyond Cumberland, MD. Restored in 1911, the bridge is listed on the National Register of Historic Sites. It is the oldest of the three bridges that span the Casselman River at Little Crossings, and together those bridges tell the region's story of transportation, settlement, and development.