That lady in the beginning has that classic New Orleans Yat accent. Sounds like something you'd expect to hear in Jersey and not in Louisiana. First time I heard it from my professor in Houston it blew my mind. I think it's a somewhat rarer accent to hear these days
My parents had a camp on Grande Isle for years and we loved going as much as we could. After their death I hadn't been there in 15 years and when I brought my daughter and her friends for a weekend I didn't even know where I was on the drive there. Every landmark I could remember was simply gone! Just completely wiped out. It's amazing that we let cherished things die, I have so many wonderful memories of that time in my life and that's where they'll stay because that's all that's left, memories.
The diversion sluices seem to be an effective way of mimicking the natural evolution of the river in building new land. The problem of course is that they will inevitably use that new land to build on, thus necessitating new "defences" and the same consequent problems and thus continuing the whole crazy cycle
This is a problem the whole nation needs to get behind. Louisiana's wetlands provide a lot for the nation not to mention wearing down hurricanes before they do more damage inland. Once it's gone it's gone forever.