Historic Bridges of the U.S.

Arkansas River Bridge (Pawnee County, Oklahoma)
Built 1935
Through truss bridge over Arkansas River on OK 18 in Ralston
Open to traffic

Deep Fork River OK 18 Bridge (Lincoln County, Oklahoma)
Built 1933
Through truss bridge over Deep Fork River on OK 18
Open to traffic

Quapaw Creek OK 18 Bridge (Lincoln County, Oklahoma)
Built 1933; replaced 2006
Lost pony truss bridge over Quapaw Creek on OK 18
No longer exists

Salt Creek Bridge (Osage County, Oklahoma)
Built ca. 1940
Through truss bridge over Salt Creek on OK 18
Open to traffic