esshup, I agree that it sounds like it a proper core was left out. My neighbor built the pond for me and he builds golf courses and ponds for the likes of A Palmer and J Nichlaus. I laugh now because he told me that he has never built a pond that didn't hold water. Of course, I had to be the first. It is a shame to because he designed it to look like a very large bunker and it is a thing of beauty.
I have been calling around today and found some high plasticity clay and can get it hauled in for about $240 per 18 yard load. My other neighbor has heavy equipment and I will hire him to use his dozer to spread it around the dam and deep end of the pond and then he will roll it with a sheep's foot. I feel pretty confident that will handle the dam leak, but should I spend the extra thousands it will cost to do the entire pond? I don't think my pond leaks out of the bottom, but it has never been full before either.
