Modern Steel Structures Co.

of Waukesha, Wisconsin
Cobban Bridge (Chippewa County, Wisconsin)
Built 1908
Pennsylvania through truss bridge over Chippewa River on CTH T
Intact but closed to all traffic

IA175 Eldora Viaduct (Hardin County, Iowa)
Built 1913
Deck plate girder bridge over Iowa River on Road
Replaced by a new bridge

Ottawa Bridge (LaSalle County, Illinois)
Built 1910
Lost Parker through truss bridge over Illinois River on La Salle Street
Replaced by a new bridge