NEW ORLEANS, Louisiana, December 29, 2008 (ENS) – Defense of Greater New Orleans’ most vulnerable area from storm surge has begun with the groundbreaking for the Inner Harbor Navigation Canal Lake Borgne Surge Barrier Project, the largest design-build civil works project in Corps history.
It is unusual for a civil works project to be designed and constructed simultaneously, but the Corps says the expedited process is necessary given the compressed timeframe to achieve 100-year flood protection in 2011.
When completed, the $700 million surge barrier, similar to a floodwall but much larger, will run for nearly two miles near the confluence of the Gulf Intracoastal Waterway and the Mississippi River Gulf Outlet. The 26 foot high barrier will run north-south from a point just east of Michoud Canal on the north bank of the waterway and just south of the existing Bayou Bienvenue flood control structure.
Navigation gates will be constructed where the barrier crosses the GIWW and Bayou Bienvenue to reduce the risk of storm surge coming from Lake Borgne and/or the Gulf of Mexico. The openings for each gate will be 150 feet wide.
Another navigation gate is planned for the Seabrook vicinity where the Inner Harbor Navigation Canal meets Lake Pontchartrain to block storm surge from entering the canal from the lake.

Confluence of the Mississippi River Gulf Outlet, left, and the Gulf Intracoastal Waterway (Photo courtesyUSACE)
The surge barrier is a new feature, authorized by Congress in 2006, the year after hurricanes Katrina and Rita devastated the area. It is expected to reduce the risk of storm damage to some of the region’s most vulnerable areas – New Orleans East, metropolitan New Orleans, the 9th Ward, St. Bernard Parish and Gentilly – to a one percent chance in any given year.
“This is territory we must defend, and we must defend it with all of our ingenuity, and with all of our strength, and with all of our determination, and with every fiber of our being,” said John Paul Woodley, assistant secretary of the Army for public works, during the floating groundbreaking ceremony December 5. It was attended by more than 100 people aboard an Army Corps of Engineers enclosed barge towed to the construction site.




