I think you mis-read it.
federal law grants exclusive and private control over the waters of the river, outside the main shipping channel, to riparian landowners.
Now to me this reads as anything OTHER then a navigation channel is off limits. That is a HUGE blow to the American public, I mean after all who's going to use shipping channel to go water skiing etc? As a Floridian this might impact some waterways, but it's not enforcable in the open ocen which is what most of Florida is about anyway.
[Edited 2006-09-17 19:51:42]