Rockwell City, Iowa

CN - County D36 Overpass (Calhoun County, Iowa)
Built 1934
Pony/through plate girder bridge over County D36 (former US-20) on Canadian National Railway
Open to traffic

CN - Lake Creek Bridge (Calhoun County, Iowa)
Timber stringer bridge over Lake Creek on CN Lake Creek
Open to traffic

Rockwell City Bridge (Calhoun County, Iowa)
Built 1915, abandoned in the 1980s
Abandoned marsh arch bridge over Lake Creek
Abandoned