I also, at first, thought Gannon had been found precisely where the other member has. There are the rocks between the two laned bridge there, too, and I zeroed in on that clue. I only found the correct place by "driving" on Google Earth and then finally found the same "photo" that appears on MSM news.
I have done time lapse views of the entire area. Rotting boats are found to be inland... out on solid ground but all of the boats I have found have been there, unmoved, since 2004... and not one boat before 2004.
In 2oo4, we had 2 really bad hurricanes that hit Florida and Pensacola was a total mess with flooding and destroyed homes. So, the area can flood but, it takes something like a hurricane to make that happen, I believe.