The Des Moines River Bridge in Humboldt, Iowa was a plate girder bridge built in 1939 located in Humboldt County, Iowa. It carried Iowa Highway 3 over the West Fork of the Des Moines River for . It was listed on the National Register of Historic Places (NRHP) in 1998. The bridge was rated functionally obsolete in 2008 and was replaced in 2010. It was removed from the NRHP in 2019. References Transportation buildings and structures in Humboldt County, Iowa Road bridges on the National Register of Historic Places in Iowa Humboldt, Iowa Bridges completed in 1939 National Register of Historic Places in Humboldt County, Iowa Plate girder bridges in the United States Former National Register of Historic Places in Iowa