John E. Quackenbush
of Webster City, Iowa
Douglas Avenue Bridge (Yankton County, South Dakota)
Built 1908Lost Closed-spandrel arch bridge over Marne Creek on Douglas AvenueReplaced by a new bridge
Oak Street Bridge (1898) (Hardin County, Iowa)
Built 1898Lost Pratt through truss bridge over Iowa River on Oak StreetReplaced by a new bridge