Bretski, Actually why couldn't I just start the bull dozer from the pond area, and keep pushing outwards to create the huge 300 foot wall. Then the pond is being dug out a little deeper and the dirt goes to build the Damn. The pond is spring fed, so it doesn't need to be that deep to avoid freezing. The small existing pond is only about 4 feet deep, and there are plenty of trout that are living in there...

Even if the Damn wall was only 6-7 feet high it would make for a good Large Mouth Bass Pond...
I'd rather have it larger than deeper...