i greatly appreciate the replies....my dirt guy has a D5 dozer and a big trackhoe....no sheeps foot. sounds like i may need to rent one?
I have my own small 50 horse Kubota tractor...i suppose that i could perhaps rent one and drag it after the dirt guys are done over and over and over again.
so based on my small size, are you saying it is senseless to worry with shelves, varying depths, and/or trenches...and instead just "dig a 8-10' hole"?

based on the "math", their intent is now to use 10" layer of clay.

Thanks

.20 acre pond-that leaks/4-5' deep. Stocked 6/22/19 with 300 BG(supposed to be HBG, removed 100+/- so far), 100 RES, 3carp. On 8/20 added 300 HBG, + 21 5"HSB. 8/21 added 5 8" SMB, one 10" LMB , one 14" CC