Historic Bridges: St. Mary Parish, Louisiana

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.

Total Bridges Found: 7

Charenton Bridge
HSR

LA-324 (Convent Street) Over Bayou Teche in Charenton: St. Mary Parish, Louisiana, United States

Metal 16 Panel Rivet-Connected Polygonal Warren Pony Truss, Movable: Swing (Center Bearing Center Pier) and Approach Spans: Metal Stringer (Multi-Beam), Fixed

Length: 350 ft. Main Span: 210 ft. Main Spans: 1

Built 1941 By: Austin Bridge Company of Dallas, Texas and Louisiana Highway Commission

This is one of a number of surviving standard plan pony truss swing bridges in the state.

Charenton Canal Bridge
HSR

LA-182 Over Charenton Canal in Baldwin: St. Mary Parish, Louisiana, United States

Metal 12 Panel Rivet-Connected K-Parker Through Truss, Fixed and Approach Spans: Concrete T-Beam, Fixed

Length: 2,380 ft. Main Span: 300 ft. Main Spans: 1

Built 1941 By: Austin Bridge Company of Dallas, Texas and Nashville Bridge Company of Nashville, Tennessee and Louisiana Highway Commission

This large and impressive bridge is one of the only remaining examples of a rare K-truss bridge in the state.

Charenton Canal Railroad Bridge
HSR

Railroad (Union Pacific) Over Charenton Canal in Baldwin: St. Mary Parish, Louisiana, United States

Metal 8 Panel Rivet-Connected Warren Through Truss, Movable: Swing (Rim Bearing Center Pier) and Approach Spans: Metal Deck Girder, Fixed

Length: 360 ft. Main Span: 207 ft. Main Spans: 1

Built By: Unknown

This railroad truss swing bridge appears to date to the mid-20th century.

Grizzaffi Bridge
E.J. "Lionel" Grizzaffi Bridge
HSR

US-90 Over Atchafalaya River (Berwick Bay) in Berwick and Morgan City: St. Mary Parish, Louisiana, United States

Metal Cantilever 16 Panel Bolt-Connected Warren Through Truss, Fixed

Length: 17,733 ft. Main Span: 617 ft. Roadway: 68 ft. Main Spans: 3

Built 1977 By: American Bridge Company of New York, New York and E. Lionel Pavlo of New York

This bridge is still a little too young to be considered to have any significant historic value, but it offers a comparison to the nearby historic K-truss bridge.

Long-Allen Bridge
Morgan City Bridge
HSR

LA-182 (Old US-90, Brashear Avenue) Over Atchafalaya River (Berwick Bay) in Berwick and Morgan City: St. Mary Parish, Louisiana, United States

Metal Rivet-Connected K-Parker Through Truss, Fixed and Approach Spans: Concrete 16 Panel T-Beam, Fixed

Length: 3,745 ft. Main Span: 608 ft. Roadway: 24 ft. Main Spans: 3

Built 1933 By: Mount Vernon Bridge Company of Mount Vernon, Ohio and Louisiana Highway Commission and Norman E. Lant

Among the longest simple span trusses in America, this is the longest known K-truss span by far and one of the most significant historic bridges in the state.

Morgan City Railroad Bridge
HSR

Railroad (BNSF) Over Atchafalaya River (Berwick Bay) in Berwick and Morgan City: St. Mary Parish, Louisiana, United States

Metal 10 Panel Rivet-Connected Polygonal Warren Through Truss, Movable: Swing (Rim Bearing Center Pier) and Approach Spans: Metal 12 Panel Rivet-Connected Polygonal Warren Through Truss, Movable: Vertical Lift (Tower Drive)

Length: 1,837 ft. Main Span: 270 ft. Main Spans: 1

Built 1908 By: Phoenix Bridge Company of Phoenixville, Pennsylvania

This swing bridge was later altered in the 1960s by the addition of a vertical lift span.

Yellow Bayou Railroad Bridge
HSR

Railroad (BNSF) Over Yellow Bayou in Rural: St. Mary Parish, Louisiana, United States

Metal 12 Panel Rivet-Connected Polygonal Warren Through Truss, Fixed

Length: 1,350 ft. Main Span: 400 ft. Main Spans: 3

Built 1941 By: American Bridge Company of New York, New York

This is a traditionally composed example of a mid-20th century through truss railroad bridge.

Historic Bridges: St. Mary Parish, Louisiana

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