Central Engineering Co. Inc.

of Seattle, Washington
Heron Street Bridge (Grays Harbor County, Washington)
Built 1949
Swing bridge over Wishkah River on US 12 in Aberdeen
Open to traffic

IL92 Silvis Yard Viaduct (Rock Island County, Illinois)
Built 1951
Steel stringer bridge over Iowa Interstate Railroad on IL 92/IL 5
Replaced by a new bridge