Known by several names, among them the Colossus Bridge, the Fairmount Bridge, the Colossus of Fairmount, the Upper Ferry Bridge, and its official name, the Lancaster-Schuylkill bridge, this 340+ foot single-arch timber bridge had the longest single-span wooden truss ever erected in the United States. The bridge was destroyed in a fire in 1838. The site is now occupied by the Spring Garden Street Bridge.

From an 1823 engraving: "Over the River Schuylkill near Morris street in the County of Philadelphia, chord of arch 340 feet, whole extent of Bridge 400 feet, rise of Arch 20 feet, elevation above water 30 feet, the span is greater by 98 feet than that of any other Bridge known, the Construction is in general new, the principle invented by Lewis Wernwag, who was afsisted in the execution by Jos.h Johnson, general design by Rob.t Mills, Architect."