The Colossus Bridge – also known as Fairmount Bridge, Colossus of Fairmount or Upper Ferry Bridge (and formally as the Lancaster Schuylkill Bridge) – was a record-setting timber bridge across the Schuylkill River near Philadelphia. It was built in 1812 by Louis Wernwag, and was considered his finest bridge design. It had a clear span of 340 feet (103.6 m) and the longest single-span wooden truss to be erected in the United States as well as the first long span bridge to use iron rods.
The bridge was destroyed September 1, 1838, by fire. The bridge was succeeded by Charles Ellet, Jr.'s wire suspension bridge and then the Callowhill Street truss bridge. The modern bridge at this site is the Spring Garden Street Bridge.
The bridge was located near Coordinates: .
- Griggs, Jr., F. E. (October 2004). "Colossus Bridge Designer Lewis Wernwag" (PDF). STRUCTURE magazine: 34–36. Archived from the original (PDF) on July 19, 2011. Retrieved November 26, 2009.
- Kapsch, Robert James. Over the Alleghenies: early canals and railroads of Pennsylvania. W. Va. University Press, 2013.
- Ryall, M. J.; G. A. R. Parke; J. E. Harding (2000). The Manual of Bridge Engineering. Thomas Telford. p. 15. ISBN 0-7277-2774-5. Retrieved April 6, 2008.
- Burr Arthur Robinson (1961). "Wernwag, Lewis". Dictionary of American Biography. New York: Charles Scribner's Sons.
- Tyrrell, Henry Grattan (1911). History of Bridge Engineering. Chicago: Published by the author. p. 135. Retrieved November 26, 2009.
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