Pond Boss Forums POND CONSTRUCTION Building a dam In need of a second opinion

Where exactly are is the water bubling out of the ground?? I can't quite follow.

The senerio of a hole sucking mud/dirt into the pipe doesn't seem feasable to me. I could easily be wrong but the water passing through the pipe should be under a positive pressure with a head of water above it which would not allow anything entering the pipe. Further a hole in the pipe large enough for mud to seep into to the point that it runs out the other end should have been easily noticed by the contractor.

What time of year was the dam built? Could there have been snow on the ground? If snow is pushed into the dam & compacted it will eventuall melt causing a void which will then sink. Several such pockets could allow a path for water through the dam.