Pond Boss Forums POND CONSTRUCTION Renovating a Pond or Lake? Crawdad holes suckin water like a toilet

I am no expert, but think it might be best to save up and redo the dam with a good compacted clay core. Otherwise, you might be fighting a losing battle for years. If you do repair the inside face, consider burying fencing that has small enough openings to prevent crawdads from burrowing through. Some use chainlink for muskrats, but that will not likely exclude crawdads.