Thompson River 3rd Street Bridge (Grundy County, Missouri)
Built 1921
Two-span through truss bridge over Thompson River on 3rd Street (Old MO 6) west of Trenton
Open to traffic

Thompson River Overflow 3rd Street Bridge (Grundy County, Missouri)
Built 1921
Three-span Baltimore through truss bridge over Thompson River Overflow on 3rd Street (Old MO 6) west of Trenton
Open to traffic

Trenton Viaduct (Grundy County, Missouri)
Built 1931; replaced 2003
Lost through truss bridge over the Union Pacific Railroad on MO 6 in Trenton
Replaced by a new bridge