I do indeed have a leak that appears to be through a section of the dam (maybe 20'W x 100'L)Only leaks when the pond is full. I had this 3/4 A(surface area)pond built 22 years ago & it has leaked in the same spot from the start. My suspicion is that the builder either improperly cored the dam or perhaps didn't core it at all! There was no rock, silt, or sand to deal with, only lots of clay for the basin & plenty of black dirt to work with. I'm at a loss as to what i should try to fix this leak. I've tried sodium bentonite years ago to no avail. Should mention the pond is leaking through the back side of the dam. Would greatly appreciate any input!
Leak seems to be where the top of the green vegetation is growing on the left half of pond................
