I don't know that I have ever seen birds diving there. We catch alot of whites. Don't just look in the discharge. They are around for a ways around the warm water. Look for the baitfish on sonar then get ready. Lots of channels to be caught as well. There is a spot in the discharge I know we could pull up right now and catch channel cat until you get tired of it or run out of bait. Uusally if your fishing worms the first fish of the day in the catfish hole is a giant small mouth. For whatever reason its happened like that the last few times I have fished it this time of year. Pay attention to wind direction as well. It will pust warm water with it. One of the best white bass days I ever had was with an east wind pushing warm water back towards the boat ramp. I don't even want to think about how many we caught that day.