"Frank" wrote in message
om...
snip
The major problem that I am having is that there is water buildup
underneath the liner. The way I discovered this is because I put the
liner in the hole, and covered the bottom of the pond with rocks, but
did not fill the pond with water. A day later, the liner of the pond
had bubbled up because of water having collected under the liner!!!
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When liners raise up, it is typically from run off, but it sounds like you
have ruled that out. If the water is persistent, there are options. Some
ponders have installed sump under their pond to pump the water out, but I
think that may be overkill. I'd recommend simply running some 1 inch PVC
from the low spot under the liner and have it end somewhere downhill from
the pond. This way as water builds it will have a place to escape, and won't
push your liner up.

BV.