Tropical storm Allison in 1992 dislodged many hundreds of acres of floating plants and hydrilla from numerous of the St. Johns River headwater lakes. Masses of hydrilla and floating crops were being carried downstream and jammed against the U.S. Freeway 192 bridge. Crops have been compressed into a decent mass https://arethereriversinflorida87429.blogdosaga.com/33379045/5-essential-elements-for-wild-and-scenic-rivers-in-florida