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