I don't see any big rock around, have you hit any soild rock areas? On our project we would hit crusty areas of small red gravel before finding clean clay below. That crusty soil would go to the back side of the dam and pack the good clay in the core. I'll just say that I'm encouraged from what I see, looks like better soil than alot of the pond digs we have around here. I know how nervous I was last year while building our lake, we hit some rock shelfs and pockets of crusty,gravely, clay but the lake is full and holding. Just pack over the areas you don't like with a few feet of clay and see what happens when it begins to fill. Also when it fills it will raise a few feet and than soak in and drop. This may happen for 6-12 months and than should begin to level out. Exciting times just enjoy the ride.
