I just thought I put a PVC pipe on bottom and a valve which I have and just close it when done with dam and would always have it if needed to drop pond level. I see where the siphon would work better.
My dam is 17 feet in tallest point and 350 feet long. I want it 12 feet across top and guessing should be 50 feet wide on bottom? How wide should the clay core be? I am hauling clay in to build dam.
