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Politics : Politics for Pros- moderated -- Ignore unavailable to you. Want to Upgrade?

To: DMaA who wrote (135589)	8/31/2005 9:41:30 AM
From: carranza2	Respond to of 793927

That, too, of course. Here's a bit of knowledge I have gained about levees: once they are topped, and water gathers at the bottom of the protected side in any kind of substantial quantity, which is possible under certain circumstances, the base starts to erode as levees are for the most part simply piles of compacted dirt. The newer levee designs account for this. These newer designs should have been in place in levees built after 1985, when Hurricane Juan did a lot of flood damage and spurred a huge hurricane levee building project but I don't know the age of the levee that broke, and I doubt that this mechanism was at play in the 17th St. Canal, which is very new and should not have failed as it is not really a levee in the first place.