When I was younger, and alot dumber, we would tie off to the side of Wilson Dam and catch catfish like crazy. Once you got about 5 feet from the dam, instead of pushing you downstream, the current would suck you into the wall. Many people who did this the first time lost their trolling motors because they "whammed" into the wall. We would even pull into the turbine chutes that had ground up small fish when they were running. The catfish were thick in there eating the "chum" generated by the turbines. I have been in there when they cut a turbine back on and it would throw the boat about 3-4 feet into the air as the water surged back out. Scary to say the least, but we were young and bullet proof at that time. It is dangerous as a cocked pistol to do this, and I wouldn't fish in those now for the world!! Guess I'm older and wiser now. Good Luck if you try it. Make sure you have a wide bottom boat that can withstand the sudden surges.