 Designed by the Army Corps of Engineers, the cantilever truss bridge with tied arch-suspended span contained four vehicular lanes and allowed all marine traffic to pass underneath unimpeded.Officially called the Paris Road Bridge, its original green painted surface led to its being called the "Green Bridge" by St. Bernard Parish residents.The I-10/LA 47 interchange was fully opened to traffic in October 1972 when the interstate was completed westward to Morrison Road near the Industrial Canal bridge.