IMHO you need to cut a core, if you make it as wide as a dozer blade then you can run the sheepsfoot easily in the core as you build back up. Think of the core as insurance, you hate to buy it but when you need it you slap yourself on the back and say that was a no brainer.

Go down until you hit good clay and then start building back up compacting in 6-12" lifts.

Get some pictures of the area.


2.5 Acre Pond
Status: Design