Hey thanks for the info. I'm considering this pretty carefully. I have had mother nature teach me many hard lessons at his point and I can't help but worry I'm overlooking something. The "what ifs" keep haunting me. What if I get half way through the project and all the way through the money. What if the hole gets dug and the water flow just disappears through the ground, after all I'm counting on the water table to provide a bottom. What if the stream flow doesn't overcome evaporation etc. This project would be an unconventional installation thus not as solid a bet as conventional---- ah but success would be sweet.