Mid Fork Zumbro River Bridge
Concrete arch bridge over Mid Fork Zumbro River on CR 18 in Oronoco
Open to traffic
Built 1918; rehabilitated 1986

North Branch Root River Bridge
Lost truss bridge over North Branch Root River on 125th Avenue (TR 1)
No longer exists
Built 1918; replaced 2005

North Branch Root River Bridge
Lost truss bridge over North Branch Root River on CR 120
No longer exists
Built 1912; replaced 2004

Oronoco Bridge
Open-spandrel arch bridge over Zumbro River on CSAH 18 at Oronoco
Open to traffic
Built 1918; rehabilitated 1987. Originally replaced an iron truss bridge built by Horrace E. Horton

Salem Creek Bridge
Pony truss bridge over Salem Creek on CR 115
Closed to all traffic
Built 1920

South Fork Zumbro River Bridge
Pony truss bridge over South Fork Zumbro River on CR 126
Open to traffic
Built 1918

South Fork Zumbro River Bridge
Through truss bridge over South Fork Zumbro River on CR 121
Closed to all traffic
Built 1895