Natural pier

Bridge incorporating a natural rock outcropping or other formation as a full or partial pier.

Natural Pier Bridge (Mineral County, Montana)
Built 1917
Through truss bridge over Clark Fork River
Open to traffic

Natural Pier Bridge (Mineral County, Montana)
Built 1916; rehabilitated 1999
Through truss bridge over Clark Fork on CR 089
Open to traffic

Port Wine Little Bridge (Plumas County, California)
Built 1936
A-frame steel stringer bridge over Slate Creek on Port Wine Road
Open to traffic

Port Wine Steel Bridge (Plumas County, California)
Built 1910
Through truss bridge over Slate Creek on Port Wine Road South of La Porte
Open to traffic

Scales Road Bridge - County (Plumas County, California)
Built 1939, bypassed 2016
Warren pony truss bridge over Slate Creek on Scales Road
Preserved in place for pedestrian traffic