Supple Ford Bridge, Spanning South Fork of Maquoketa River, Clay Mills, Jones County, IA

Significance: The Jones County bowstring arch-truss bridge is a virtually intact example of a once-common technology in bridge design in Iowa, the bowstring bridge designed by the King Bridge Company of Cleveland, Ohio. In 1980, this bridge was described as one of only approximately 28 remaining bowstring bridges in Iowa and one of four remaining bowstring bridges in Jones County. It was erected in 1875 and is the second oldest surviving iron truss bridge in Jones County and the oldest remaining bridge built by the King Iron Bridge Company in the county today.
Survey number: HAER IA-32
Building/structure dates: 1875 Initial Construction