[konaice]

There were actually several floodwalls that failed, and several failures per floodwall.

There were two breaches, both in the same levee. One by surge action, one by loose barge.

[CobaltBlue]

There were two breaches, both in the same levee.

That's just one canal.

[Howlin]

I don't think Cobalt should start spending that "award" just yet.

If this turns out like 9-11, it will be the end of time before they decide whether it was one event (hurricane) or two events (hurricane & levees).

[StayAt HomeMother]

"There were two breaches, both in the same levee."

There seem to have been several breaches in several canals:

http://www.nola.com/newslogs/tporleans/index.ssf?/mtlogs/nola_tporleans/archives/2005_09_13.html#079207

“… Floodwalls were breached in the 17th Street Canal, at two places in the London Avenue Canal, and at two places in the Industrial Canal…”