Thanks for the observation, There is a small dip in the center- about 4". Here is another pic at or close to the center with the normal (full) pool level at the bottom of the stake. I have two natural, wide, drains, one on each side that I hope will take care of a flood condition. The water will never get as high as the dam because the inflow to my exisitng pond is about 18" below the adjacent road level. I just hope that it will fill up some time soon.
