Des Moines River Bridge (Swea City, Iowa)

The Des Moines River Bridge is a historic bridge located southwest of Swea City, Iowa, United States. It spans the Des Moines River for 102 feet (31 m). In February 1916, the Kossuth County Board of Supervisors approved the contract for the Des Moines Marsh Engineering Company to build the bridges. It was designed by the company's engineer James B. Marsh. The 9-panel Marsh fixed arch bridge, also known as a "rainbow arch", was completed in 1916 for $7,150. It features two tapered concrete arches that carry the roadway in between them from hangers. It was listed on the National Register of Historic Places in 1998.