Pond Dam

How to deal with trees on a Pond Dam

A leaking Pond Dam can be sealed using Bentonite Clay mixed into the Dam material. LetsDig18 has a video where he digs back part of a dam, then mixes Bentonite into the clay used to form the Dam. The material is all compacted as it is put back into the Dam.

Bentonite can expand 15x its volume when exposed to water. This is why it is used in Oil Drilling to help seal bore holes.