There is really no telling what was used to create these holes, but
the pattern is definitely distinctive. Fortunately, the holes were
in the top of the AquaDam®. Had they been in the side of the dam,
the water would have drained out before the replacement dam arrived.
The contractor was able to call and arrange for AquaDams® to deliver a
new dam and assist in the reinstallation. A small hole was cut in the
far end of the first unit, and the next was started up the bank so as
it rolled out it would force water out of the damaged dam.