re: No Flow Rates, Levee System failure scenario.. quite possible

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You will see that what the real danger lies in the fact that with the Flow Rate being so high for an extended period of time (weeks maybe months), Erosion of the levee system is inevitable.

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The damage to the Old River Control Structure in 1973 was similar to the phenomenon discussed in that video.
NOAA report SR/SSD 98-9:
FLOODS ON THE LOWER MISSISSIPPI: AN HISTORICAL ECONOMIC OVERVIEW

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It was in 1973 that the strain of record high volume flow nearly caused failure of the Old River Control Structure,

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Scouring almost caused the failure of ORCS and it's one of the effects that can undermine levees.

Times Picayune, May 5, 2011

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Jindal also said the Corps of Engineers and area levee districts will move into a daily inspection of area levees to guard scouring or sand boils that could harm the integrity of the levees.

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