I fished damn near every good floodgate in Texas for a good 15 years..I admit it's been 15 yrs since then as I now fish from boat..that being said, all flood gates fish very differently...Flood gates always fish best for big cats when water is flowing...caught my biggest 65lbs and most (33 in one night) flatheads when the gates were wide open! Same with hybrids, striper, and sandies..no current no bite! Go down to the first deep hole down stream when the water stops flowing and the fish will stack up in those holes pretty good...good luck...pm me if you need rigging advice, each floodgate required different kinds of rigging from tight lining in big current for monster cats to slip bobber flowing water for stripers..if you don't have the right rig floodgate fishing you won't catch [censored]
There is a fine line between fishing and floating around like an idiot!!