The Caloosahattee River was once a winding 103 mile, shallow river, until in the late 1900's, The Army Corp of Engineers, drudged out, deepened and widened, and straightened the river making it 67 miles long. It is considered to be a C-43 canal, that has two dams and locks that help provide water supply and flood control, but also provide the means of transportation of boats and tugboats and barges, the use of the river. Water management is working on plans to provide areas along the river for additional watershed management and improvement of quality of the water, which at present time is showing signs of pollution both manmade and from natural means, and exotic plants and fish.
Here is a video about the Caloosahattee River and the methods planned for restoring the ecosystem.