Central Engineering Co. Inc.
of Seattle, Washington
Heron Street Bridge
(Grays Harbor County, Washington)Built 1949Swing bridge over Wishkah River on US 12 in AberdeenOpen to traffic
IL92 Silvis Yard Viaduct
(Rock Island County, Illinois)Built 1951Steel stringer bridge over Iowa Interstate Railroad on IL 92/IL 5Replaced by a new bridge