Gulf Intracoastal Waterway

Belle Chasse Tunnel (Plaquemines Parish, Louisiana)
Built 1956
Tunnel under the Intracoastal Waterway on Southbound LA 23
Open to traffic

Judge Perez Bridge (Plaquemines Parish, Louisiana)
Built 1968
Vertical lift bridge over the Algiers Canal (Gulf Intracoastal Waterway) on LA 23 in Belle Chasse
Open to traffic

MoPac - Algiers Canal Bridge (Plaquemines Parish, Louisiana)
Built 1957 by the Missouri Pacific Railroad
Through truss bridge over Algiers Canal (Gulf Intracoastal Waterway) on former Union Pacific RR
Closed to traffic