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 Open to traffic Built 1920