Well, I'm not sure what to make of our pond any more. We were @ the property last week to check on the contractors progress & took a walk back to the pond only to find it 1.5ft below the outlet pipe. I'm pretty sure this is not a man made pond. There is no berm or dam to hold water. It's in a natural low area. I still plan to investigate further, but is it gonna be of any use if the water level fluctuates so much?