Well again, show me the pictures, We had enough aerial coverage to find a barge if someone thought a barge had done some damage. Remember the levee broke after the storm, in the morning. No place for the barge to go but into the flood zone. Now, there are many levee breas, I was referring to the main one that broke on the Lake side. I guess of the many breaks a barge could have done one of them. I believe a full recap will be forthcoming one day. No need to worry too much just now.
As I understand it, the levee's along the Lake itself did not fail, rather containment structures (levees) along several canals leading to the lake, and at the same water level as the Lake, are what failed. Which when you think about it, seems a bit odd. Although I guess the canal structure could have acted as a funnel to raise the level of water in the canal higher than that in the Lake, or a reflection of the initial wave from the River end of the canal (Where there's a lock) could have reinforced the trailing part of the surge causing the water to be higher in the canal than in the lake, at least for a short period of time. Long enough to over top and then undermine the levee. Maybe, perhaps. Be nice to have a video of the affair wouldn't it?