I'm across the Ohio river from you and have been involved in the building of a few ponds,including my own in 1984. I've never heard of such costs, but my experience is in the past and I'm not up on current heavy equiptment costs. It's hard to push mud & if you have to truck it off site prices skyrocket. Is there no place on your 5 acres to dump and let it dry ?
There wouldn't be many ponds built in no. ky. at those prices. Thankfully,we have good clay in many areas!