Thank you for all the info. I was told they covered back with clay once realizing it hit. A good amount of water came up from the table. They only used a dozer and excavator for equipment. I will say after they did that it did all dry up, but I have no clue how good of a job they did compacting the clay back over it. My guess is not that great. I’m a bit irritated it’s all gone this way of course. I do have a contract and pretty generic terms and then basic line items with building of the pond and the windmill/aeration feature. They did dig a trench and packed the core on dam side at least. We got some rain over past couple days and has couple up a few inches or so. I’ve been putting stakes to mark levels and watching. I may have to talk to a lawyer, but my feeling is with how it all happened I shouldn’t be fully responsible for paying almost half the original cost to go back and have it sealed properly. Interested in others opinions on that.