Henszey's Wrought Iron Arch Bridge. Early example of a wrought iron bowstring arch truss bridge. Patented in 1869 by Joseph G. Henszey and built that year by the Continental Bridge Co. of Philadelphia, this bridge was part of a proliferation of bridges following the Civil War. In Lehigh County it crossed Trout Creek in Slatington and then was moved in 1900 to span the Ontelaunee Creek at Wanamaker. In 2002, the bridge was moved to Summerdale to carry pedestrian traffic.