The Fort Madison Toll Bridge (also known as the Santa Fe Swing Span Bridge for the old Santa Fe rail line) is a tolled, swinging truss bridge bridge over the Mississippi River that connects Fort Madison, Iowa and unincorporated Niota, Illinois. Rail traffic occupies the lower deck of the bridge, while two lanes of road traffic occupy the upper deck. It is widely considered the longest double-deck swing-span bridge in the world. Completed in 1927, it replaced an inadequate combination roadway/single-track bridge completed in 1887. The main river crossing consists of four 270-foot (82 m) through truss spans and a swing span made of two equal arms, 266 feet (81 m) long.