A. Olson Construction Co.
of Waterloo, Iowa
(Boone County, Iowa)Contractor, 1928Lost Parker through truss bridge over Des Moines River on Lincoln HighwayReplaced by a new bridge
Cherry Street Bridge
(Butler County, Iowa)Built 1900Arch bridge over a drainage ditch on Cherry Street in Shell RockOpen to traffic
(Winneshiek County, Iowa)Built 1930Lost Bridge over Upper Iowa River on Old alignment of Iowa 139Replaced by a new bridge
(Van Buren County, Iowa)Built 1939Lost through truss bridge over Des Moines River on IA 1 in KeosauquaReplaced by new bridge