csulli, I forgot to mention on thing in my post.
This comment needs to be checked by TX pond owners - If you wanted a little more depth, you can have some good sized areas of deeper holes made with a mid to large sized back hoe. With a day of backhoe work, I would think you could make 20+ deep holes in the 15' diameter range.
There may be a risk of breaching your ponds(I mean lake) water holding capability or hitting some kind of porus rock. That's why I say that my comment needs to be checked.
