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Historic Bridges: Morrison Knudsen of Boise, Idaho and American Bridge Company of New York, New York

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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Total Bridges Found: 1

Sunshine Bridge
Donaldsonville Bridge
HSRNational HSR. Local HSR.
Click to visit page.
LA-70 Over Mississippi River, LA-18, and LA-44 in Rural: St. James Parish, Louisiana, United States
Metal 20 Panel Bolt-Connected Arch, Fixed and Approach Spans: Metal 10 Panel Rivet-Connected Warren Deck Truss, Fixed
Length: 9,102 ft. Main Span: 825 ft. Roadway: 56 ft. Main Spans: 5
Built 1964 By: Morrison Knudsen of Boise, Idaho and American Bridge Company of New York, New York and Palmer and Baker Engineers of New Orleans, Louisiana
Although a late example of a cantilever truss bridge, this bridge is noted for its long approaches and its five main span configuration.

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