[LonePalm]

The Corps nearly lost the Old River Control Structure in the 1973 flood.

Yes, I know. That is one of the reasons I asked the question.

Garde la Foi, mes amis! Nous nous sommes les sauveurs de la République! Maintenant et Toujours!
(Keep the Faith, my friends! We are the saviors of the Republic! Now and Forever!)
LonePalm, le Républicain du verre cassé (The Broken Glass Republican)

[stboz]

Doesn't the Achafalaya get about a third of the Mississippi flow anyway?

[centexan]

I just downloaded Google Earth last week. It's Google maps on steroids. It even tell you the elevations. Take a look at the elevations of the rivers at the Old River Control Structure. It's at 31' 05, 91' 36.