Originally posted by heybud:
Once crawfish burrow through the clay lining it is possible that the pond will start leaking.
You've got that right! Most crawfish will burrow 10' into soft mud, but I like another 5' for a safety margin.
That's just general info. More general info: Crawfish do not like to burrow into pure sticky clay, and even less so in sand. They try to avoid clay and sand by burrowing laterally (into the banks) above the clay strata. Only when the water levels drop to near zero will they burrow downward deeply into a clay bottom. They rarely even venture out very far into a deep pond. It's a jungle out there.