I've seen speculation by the Army Corp that it could take weeks to months to remap and dredge the Mississippi River channel after this is over. And "over" includes the flood coming down the Mississippi that hasn't happened yet. It is possible that the mouth of the river has moved as this is the kind of event that does it.
Yep, that sounds about right.
If a previous post on here was correct, Plaquemines Parish is pretty much toast.
I'll be it's hard to see where the river starts and stops now because the hurrican likely obliterated its current course.