What would you do ? Test holes on the best pond site on my property produces 50-50 results at 9ft. The soil will ball up nicely, but there are inconsistencies between the clay and sand levels, the color is light tan. The dozer operator reporting the results has 40 years experience, builds a lot of ponds and knows his stuff.
This site would be approx. 60-70% excavated, large watershed so the freeboard space would be above average.
If built properly, would I be at a higher rate for the dam failing, or a leaky bottom...or both? Would adding betonite before hand help if I go forward on the location?
