I am starting to dig a new one acre pond. We dug four test holes. In two of the holes we hit a thin layer of sand followed by clay with some gravel mixed in. After we dug the hole it immediately started to fill up with ground water. For two of the holes we dug we hit about 6-7 feet of sand that was so saturated in water that it was basically muck. It was very difficult to dig with the mini ex. I figure that if it is a water table pond that I do not need to worry about it leaking I just have to deal with water table fluctuations. I have use on site for all the fill except for the sandy muck. My plan would be to dig the pond deeper than I otherwise would and fill any sandy muck back into the pond. Any guesses whether that muck, once the pond is full, would settle into a simple sandy bottom or would It stay muck on the bottom of the pond? Thanks.
