[Rome2000]

Get a boat, once that thing is opened they won’t be able to close it.

[GailA]

That is why they blew those levies in ILL.

[Wonder Warthog]

"Get a boat, once that thing is opened they won’t be able to close it."

Baloney. WHERE did you come up with THAT notion.

Note: I grew up in that area, watched the Morganza (and Old River) being built, was there for the 1973 flood, and drove over it for many years after that ('til 1995, when I moved to Washington for business reasons).

[Wonder Warthog]

"Get a boat, once that thing is opened they won’t be able to close it."

I did some checking, and you were partially right. The spillway that "won't be able to be closed" is the Bonnet Carre, and you left out a key phrase......"until the floodwaters subside".

The Morganza and Old River structures use a different design, and the bays therein can be opened or closed at any time, no matter what the level of the floodwaters might be.