IA3 Branch Maquoketa River Bridge (Dubuque County, Iowa) Built 1931 Concrete arch bridge over a branch of Maquoketa River on US 52/IA 3 Open to traffic
IA3 Branch Steeles Creek Bridge (Delaware County, Iowa) Built 1933; rehabilitated 1940 Concrete arch bridge over a branch of Steeles Creek on IA 3 Open to traffic
IA3 Little Turkey River Bridge (Delaware County, Iowa) Built 1932 Concrete arch bridge over Little Turkey River on IA 3 Open to traffic
IA3 West Fork Des Moines River Bridge (Humboldt County, Iowa) Built 1939, replaced 2007 Plate girder bridge over West Fork Des Moines River on Iowa Highway 3 Replaced by a modern bridge