to quote an aquantaince of mine

"In a nut shell, there was some property, it was normally 3.5 miles from the Mississippi river. It was a private place with a small lake and hunting grounds. Some guys during a flood, went over to the property, the Sheriff arrested them or escorted them off the "land" as trespassers. They sued saying they had a right to be there. The judge ruled that the La. definition of "normal high water" was not the same as BIG *** FLOOD. The judge ruled that they did not have a right to be there."

If anybody would like to read the full decision, you can find it here
http://www.michaeldsawyer.com/aboutus3.html