Our 50 acre lake runs through the spillway more than half the year, and that's with the 6" bottom drain wide open. Late summer it will drop done and even close the bottom drain for a couple of months. Part of it is spring fed and over 2000 acres of watershed. Normally a few inches going through, but a 6 or 7 inch rain will push it to 4 feet for hours. We definitely lose fish when that happens. We're probably going to try fencing the spillway to try and save larger fish, maybe the 2"x4" wire.
