Pond Boss Forums POND CONSTRUCTION Building a dam I think I have a leak around the overflow pipe

Spillway leak due to poorly compacted clay around pipe and perhaps no antiseep collars installed. Clay must be HAND TAMPED around pipe and as collars.

Fixing is simple in my experience: Either drain pond 2-3' or wait for Summer drop and excavate as much material as possible from pipe on pond side. Compact layer of clay followed by layer of SeekLeak polymer or Sodium Bentonite, and keep adding these compacted layers until original excavated material has been replaced. Resolved hundreds of spillway leaks this way - process take a couple hours.