I love fishing dams. My advise is to fish that dam day or night. Use a small hook and worms to catch bluegill or perch. Use a 7/00 hook on your catfish pole. Hook your bait threw the tail, just behind the back and belly fins, cut the tail fin off with a sharp knife, just the fin this shouldn’t make the bait bleed but will slow it down.
Good luck,
Derek Welch