Pond Boss Forums POND CONSTRUCTION Building a dam cutoff trench, or core trench after the fact

John, I have seen a contractor dig a 6 or 7'wide and 12 foot deep trench in the dam (while the pond had water in it) and then add clay (hauled in from another area on the property). He would add the clay and every so often he would use a drivable vibrating sheep's foot vehicle. He tried a smaller (3 to 4' wide unit) remote controlled version of a sheep's foot but it was to slow to do the job he wanted. He rented the sheep's foot equipment. He told me later where he used the remote control unit he was still seeing some seepage. I am not sure if this will help you but thought I might pass this along. Hope this helps