Special Bridge Conditions Legend:R - Former location of relocated bridge. ! - At risk for demolition or destruction.
X - Confirmed demolished or
collapsed. S
- Dismantled and/or in storage. L -
Severe loss of historic integrity due to alteration.
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I-676 (US-30) and PATCO Over Delaware River and Streets in Philadelphia: Philadelphia County, Pennsylvania and Camden County, New Jersey, United States
Metal Pony Truss Stiffening Wire Cable Suspension, Fixed and Approach Spans: Metal Rivet-Connected Warren Deck Truss, Fixed
Length: 8,170 ft.
Main Span: 1,750 ft.
Roadway: 77.8 ft.
Main Spans: 3
Built 1926
By: American Bridge Company of New York, New York
and Modjeski and Masters (Ralph Modjeski)
US-30 (8th Avenue and Clinton Road) Over Mississippi River and Railroad in Clinton and Fulton: Clinton County, Iowa and Whiteside County, Illinois, United States
Metal Pony Truss Stiffening Wire Cable Suspension, Fixed and Approach Spans: Metal Deck Girder, Fixed
Length: 4,165 ft.
Main Span: 644 ft.
Roadway: 26 ft.
Main Spans: 1
Built 1956
By: Allied Structural Steel Company of Chicago, Illinois and Clinton Bridge and Iron Works of Clinton, Iowa
and Modjeski and Masters
FL-51 (Irvin Avenue) Over Suwannee River in Rural (Near Mayo): Lafayette County, Florida and Suwannee County, Florida, United States
Metal Pony Truss Stiffening Wire Cable Suspension, Fixed and Approach Spans: Concrete T-Beam, Fixed
Length: 687 ft.
Main Span: 420 ft.
Roadway: 26 ft.
Main Spans: 1
Built 1947
By: L.J. and W.J. Cobb Construction Company of Tampa, Florida and Nashville Bridge Company of Nashville, Tennessee
and Florida State Road Department
Menai Bridge
Menai Suspension Bridge (Pont Grog y Borth)
A5 (London to Holyhead Road) Over Menai Strait (Afon Menai) in Menai Bridge (Porthaethwy) (Y Borth) and Bangor: Isle of Anglesey (Ynys Môn), Wales (Cymru) and Gwynedd, Wales (Cymru), United Kingdom
Metal Pony Truss Stiffening Eyebar Chain Suspension, Fixed and Approach Spans: Stone Semicircular Deck Arch, Fixed
Length: 1,368 ft.
Main Span: 577 ft.
Roadway: 24 ft.
Main Spans: 1
US-44 and NY-55 Over Hudson River and Various Streets and Railroads in Poughkeepsie and Highland: Dutchess County, New York and Ulster County, New York, United States
Metal Pony Truss Stiffening Wire Cable Suspension, Fixed and Approach Spans: Metal Solid Ribbed Spandrel Braced Deck Arch,
Length: 4,201 ft.
Main Span: 1,495 ft.
Roadway: 30.8 ft.
Main Spans: 3
Built 1930
By: American Bridge Company of New York, New York
and Ralph Modjeski and Daniel E. Moran
NY-812 Over St. Lawrence River (Fleuve Saint-Laurent) in Prescott and Ogdensburg: Leeds and Grenville United Counties, Ontario and St. Lawrence County, New York, Canada
Metal Pony Truss Stiffening Wire Cable Suspension, Fixed and Approach Spans: Metal 10 Panel Rivet-Connected Warren Deck Truss, Fixed
Length: 7,385 ft.
Main Span: 1,143 ft.
Roadway: 26 ft.
Main Spans: 3
Built 1960
By: American Bridge Company of New York, New York
and Modjeski and Masters
QC-153 Over Rivière Saint-Maurice in Grand-Mère (Shawinigan): Mauricie, Québec, Canada
Metal Pony Truss Stiffening Wire Cable Suspension, Fixed and Approach Spans: Metal Girder, Fixed
Length: 1,102 ft.
Main Span: 950 ft.
Roadway: 26 ft.
Main Spans: 1
Built 1929
By: Canadian Bridge Company of Walkerville, Ontario and Fraser, Brace and Company, Limited
and Robinson and Steinman of New York, New York, and Philip Louis Pratley
QC-368 Over St. Lawrence River (Fleuve Saint-Laurent) (North Channel) in Quebec City (Ville de Québec) and Saint-Pierre-de-l'Île-d'Orléans: Capitale-Nationale, Québec, Canada
Metal Pony Truss Stiffening Wire Cable Suspension, Fixed and Approach Spans: Metal Rivet-Connected Warren Deck Truss, Fixed
Length: 5,700 ft.
Main Span: 1,059 ft.
Main Spans: 3
Built 1935
By: Dominion Bridge Company of Montréal, Québec
and Monsarrat and Pratley of Montréal, Québec (Charles Nicholas Monsarrat and Philip Louis Pratley)
Seaway International Bridge Road Over St. Lawrence River (Fleuve Saint-Laurent) South Channel in Cornwall: St. Lawrence County, New York and Stormont Dundas and Glengarry United Counties, Ontario, Canada and United States
Metal Pony Truss Stiffening Wire Cable Suspension, Fixed and Approach Spans: Metal Deck Girder, Fixed
Length: 3,480 ft.
Main Span: 895 ft.
Roadway: 27 ft.
Main Spans: 3
Built 1958
By: American Bridge Company of New York, New York
I-278 Over East River, Harlem River, Bronx Kills, and Various Streets in New York: The Bronx, New York and Queens, New York and Manhattan, New York, United States
Metal Pony Truss Stiffening Wire Cable Suspension, Fixed and Approach Spans: Metal 12 Panel Rivet-Connected Polygonal Warren Through Truss, Movable: Vertical Lift (Tower Drive)
Length: 13,111 ft.
Main Span: 1,380 ft.
Roadway: 90.6 ft.
Main Spans: 3
Built 1936
By: American Bridge Company of New York, New York
and Othmar Ammann