I don't think any professional engineer would sign off on it, because some of any future liability could be on him. To me, this place is one that would be un-sellable. Why the developers below were even allowed to develop this is questionable. If you purchase it, the local authorities could make you drain it in the future, if they deem it a great risk due to dam safety. Even if you were to be found not liable in a future scenario, the cost to defend it could run many thousands of dollars. Please keep us posted on your findings. This is an interesting case.
