If you have good clay, you might consider draining it dry and going over it real well with a sheepsfoot. I put in a bottom drain in the 1/2 acre pond that I dug last year in case mine did not seal. But even with very very little watershed, it was less than a foot below full-pool even during the driest weather this summer. It did take quite a while to fill though, but I will likely never see the emergency spillway get used even with only a 6" main drain. The little sheepsfoot roller was a good Craig's List buy for me.
Last edited by RAH; 10/16/18 09:20 AM.
