Cody Veach, What I meant to say was the dam itself has not really had opportunity to prove itself as a problem because the bowl shape of the pond bottom will drain sooner than the water level can actually reach the base of dam. The pond bottom on the other hand has proven to be a problem, but whatever other problems the pond may have are just a guess at this point.
By stating that clay is the only way, do you mean to say a vinyl liner or soil concrete which I mentioned would not work? I would guess they would work but I'm to ignorant on the subject to state that as fact. Thanks for your insight and I will count this as a vote toward clay.
