Inner Harbor Navigation Canal Floodwall

摘要

The $330-million floodwall Is a key aspect of New Orleans' new Inner Harbor Navigation Canal Surge Barrier, the largest design-build civil-works project in the U.S. Army Corps of Engineers' history. The alignment spans about 7,500 ft, closing off the Mississippi River Gulf Outlet and tying into the Gulf Intracoastal Waterway bypass structure. The 100-year storm-surge design requires protection against a surge of 21.6 ft on the flood side of the wall, plus a significant wave height of 6.7 ft. The main foundation component is a series of post-tensioned concrete piles-each 66 in. in dia and 144 ft long-that were cast in 16-ft sections. Piles were driven with 6-ft center-to-center dimensions.