I have indeed caught bass at the discharge in winter on artificials. However, it can be a difficult task. Fish SMALL! Use tiny twister-tail jigs. Cast them out, let them sit, twitch, etc. Make them immitate a dying creature. I would recommend Berlely Powerbait twistertails. Get the 2" crappie ones and rig 'em on a red jighead.
Thanks for the tips Jason. I was out there today for about an hour, throwing mostly small jigs, including one with a twister-tail on it like you mentioned. The only thing I managed was one bite from a small (about 6 in.) bass but didn't set the hook properly and it got away.
You're definitely right that it's a challenge fishing with artificials during the winter... especially when you can SEE all of those bass (and zillions of sun fish) there by the discharge. When I first saw all the fish at the discharge, I thought to myself, this is going to be too easy. But then I quickly realized how hard it actually was to hook one (at least with artificial stuff)
By the way, I noticed a white colored fish about 8-10 in. by the discharge today. It was kinda fat, with a little more girth than bass with similar length. It might have had a few orange spots on it also. One passer-by said it looked like either a goldfish or a koy (sp?). My guess is either one of those, or a genetic mutation (sort of like an albino). Just thought I'd share that and see if anyone else has seen this special fish or can ID it.