Rowly.....that is a good question. In one of my other threads, I mentioned talking to NRCS. They came to my pond and talked about the possibilites. The gentleman told me that the water table is always high in the area I live in. I also looked at satellite images of my area. A nice size pond was dug about 1\4 mile from my house and has plenty of water in it. Upon investigation it was dug down into the groundwater and is holding so far even with our drought. Rain the forcast...up to one inch possible.