Little Sioux River Bridge (Clay County, Iowa)
Built 1914; rehabilitated 1951Concrete arch bridge over Little Sioux River on US 18/US 71Open to traffic
Milwaukee River Bridge (Milwaukee County, Wisconsin)
Built 1924Bascule bridge over Milwaukee River on State Street (Westbound US 18) in MilwaukeeOpen to traffic
Milwaukee River Bridge (Milwaukee County, Wisconsin)
Built 1985Vertical lift bridge over Milwaukee River on Wells Street (Eastbound US 18) in MilwaukeeOpen to traffic
Mississippi River US 18 Bridge (Clayton County, Iowa)
Built 1974Steel through arch bridge over Mississippi River on US 18 between Marquette and Prairie du ChienOpen to traffic
Spencer Grand Avenue Bridge (Clay County, Iowa)
Built 1915; rehabilitated 1951Lost concrete arch bridge over Little Sioux River on US 18/71 (Grand Avenue) in SpencerReplaced by a new bridge