The Kahn arch bridge category is to designate those extremely rare concrete arch bridges which use the type of reinforcing patented by Julius Kahn of the Trussed Concrete Steel Company of Detroit, Michigan.
Fairmount Avenue Bridge
(Chautauqua County, New York)Built 1910Kahn reinforced concrete arch bridge over Chadakoin River on Fairmount AvenueOpen to traffic
Lake Park Footbridge
(Milwaukee County, Wisconsin)Built 1906Concrete arch bridge over Ravine Road on Lake Park in MilwaukeeOpen to traffic