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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20 Mile Road Over I-94 in Rural: Calhoun County, Michigan, United States
Concrete Continuous Curved T-Beam, Fixed
Length: 227 ft.
Main Span: 71 ft.
Roadway: 24 ft.
Main Spans: 4
Built 1960
By: Holloway Construction Company of Livonia and Wixom, Michigan and Raff and Dexter of Lansing, Michigan
and Michigan State Highway Department
23 Mile Road Over I-94 in Rural: Calhoun County, Michigan, United States
Concrete Continuous Curved T-Beam, Fixed
Length: 227 ft.
Main Span: 71 ft.
Roadway: 26.2 ft.
Main Spans: 4
Built 1960
By: Holloway Construction Company of Livonia and Wixom, Michigan and Argersinger - Morse Construction Company
and Michigan State Highway Department
27 Mile Road Over I-94 in Rural: Calhoun County, Michigan, United States
Concrete Continuous Curved T-Beam, Fixed
Length: 360 ft.
Main Span: 113 ft.
Roadway: 26 ft.
Main Spans: 4
Built 1960
By: Holloway Construction Company of Livonia and Wixom, Michigan and E. C. Nolan and Son of Detroit, Michigan
and Michigan State Highway Department
US-40 Over Monongahela River and Various Roads and Railroads in Brownsville: Fayette County, Pennsylvania and Washington County, Pennsylvania, United States
Metal Continuous 14 Panel Bolt-Connected Warren Deck Truss, Fixed and Approach Spans: Metal Deck Girder, Fixed
Length: 2,133 ft.
Main Span: 518 ft.
Roadway: 60 ft.
Main Spans: 3
Built 1960
By: Pittsburgh - Des Moines Steel Company of Pittsburgh, Pennsylvania
and Robert W. Lowry of Harrisburg, Pennsylvania
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