The Main Street Bridge is a historic structure located in Charles City, Iowa, United States. It spans the Cedar River for 248 feet (76 m). Before a bridge was built at this location local citizens would cross the river by way of a ferry, at a ford in summer, and across the ice in winter. The first bridge at this location was washed away in a flood while it was under construction in 1858. The second bridge was completed in 1864, and it was destroyed in a flood two years later. A temporary bridge was completed in 1867, and it was replaced by a truss bridge in 1870. It was used for 40 years despite an engineer's study in 1892 that suggested it be condemned. The Floyd County Board of Supervisors approved a replacement bridge in 1908. The old bridge was moved to a new spot five blocks downstrea