We have a bulletin from the August 28, 1952 Toccoa Record:
“John F. Carey, Demorest engineer, making a survey of Toccoa Falls Wednesday in connection with the proposed amphitheatre, says that he finds the height of the falls to be only 167 feet.
“Carey climbed to the top of the falls and dropped a steel tape to the bottom. The height has always been thought to be 186 feet.”
(Apparently Carey’s measurement didn’t stick. Both Wikipedia and the city of Toccoa continue to list the falls at 186 feet. No word if this actually ran deeper, say a feud between Habersham and Stephens counties.)