Waters from the Green Swamp drain into the river near Supply and flow southward to empty into the Atlantic Intracoastal Waterway near Sunset Harbor.

Working tirelessly for many months, Lockwood finally completed his sailing ship, but when he tried to float the boat, he discovered that he had made the draft too deep to clear the sandbar at the inlet.

The locals began calling the ship "Lockwood's Folly" and according to the story, eventually the name was applied to both the river and inlet.

[5] The second tale tells the story of a group of settlers led by a man named Lockwood that decided to colonize the banks of the river.

Lockwood supposedly did not bring enough supplies or got into a dispute with the local Indian tribe and the colony had to be disbanded.