Just a quick update....
Had a small excavator out. Could only dig about 9ft down. Below the topsoil its basically all sand!!!
Also didn't hit a drop of water.
Added 600gal of water into the hole. Over 2 days the water has dropped several feet but there is still some water holding in the bottom.
Thinking for a next step I get a bigger unit out to dig at least 15-18ft down to see what I hit. Hoping it won't be too far below the existing hole to hit clay.
Presuming I hit clay....would it be a reasonable plan to carve out the pond and then use a bunch of clay to line the entire pond overtop of the sand?
And how much depth for clay would I want to layer over the sand?
Thank you