Talk to the Corps, they're the ones who have been working on the levees almost nonstop since Katrina
"The U.S. Army Corps of Engineers (Corps) completed the repair and restoration of 220 miles of floodwalls and levees in June 2006. The Corps continues to improve the hurricane protection system, and the New Orleans area now has the best flood protection in its history. In April 2008, the Corps awarded its largest design-build contract ever (The Shaw Group), and is currently on track to meet its goal of completing 100-year protection by the year 2011.
From-Fact Sheet: Rebuilding the Gulf Coast
http://www.whitehouse.gov/news/releases/2008/08/20080820-5.html
Nagin in his first acknowledgment of Gustav made the statement about the unfinished repairs. He's off the hook when NO floods again and again and again.