All the fish that I caught there have been on cooler overcast days, but that was before the "No Fishing" signs were placed there, have been trying to find out for the last 4 years who had place them there but to no avail, so take note and decide for yourself if you wanna go or not.
The Main dam is the only dam we ever fished as the top one is really shallow if memory serves me at all and the bottom one was always an issue to get to with all the plantgrowth, anyhows the main dam was always the one of choice as it has fish and it's accessible from most sides.