Cairo Ohio River Bridge (Alexander County, Illinois)
Built 1937; rehabilitated 1979Continuous through truss over the Ohio River on US 51/60 between Cairo, Illinois and Wickliffe, KentuckyOpen to two-lane traffic
Cobden Bridge (Union County, Illinois)
Lost through truss bridge over the Illinois Central Railroad on Old US 51 in CobdenReplaced in 1997
Illinois River I-39 Bridge (La Salle County, Illinois)
Built 1987Steel through arch bridge over the Illinois River on I-39/US 51 near La Salle in OglesbyOpen to four lanes of traffic
Rock River Bridge (Rock County, Wisconsin)
Built 1938; rehabilitated 1969Deck truss bridge over Rock River on US 51Open to traffic
Wisconsin River Bridge (Marathon County, Wisconsin)
Built 1915Concrete arch bridge over Wisconsin River on Eastbound US 51/WI 52 in WausauOpen to traffic