Zitterell-Mills Co.

of Webster City, Iowa
CN - Old US-20 Bridge (Delaware County, Iowa)
Substructure, 1921
Deck plate girder bridge over 210th Street (Old US-20) on Candian National Railway
Open to traffic

UP - US65 Overpass (Story County, Iowa)
Substructure, 1934
Steel stringer bridge over US 65
Open to traffic