Tropical storm Allison in 1992 dislodged many hundreds of acres of floating plants and hydrilla from numerous on the St. Johns River headwater lakes. Masses of hydrilla and floating crops had been carried downstream and jammed against the U.S. Highway 192 bridge. Crops have been compressed into a tight mass https://riversofflorida66319.blazingblog.com/33567020/getting-my-rivers-found-in-florida-to-work