Thanks for the leads guys!
I must say that the client said he knows the whereabouts of their spring, because their concern was to seal the pond and not seal the spring...

They probably dont realize that the spring needs to be sealed.
Sure would be less expensive to seal the spring with bentonite and reduce flow of water from well.
Targeting the spring with a pipe application sounds feasible.
If it wont work, I'll suggest ESS-13...
In the end it seems to me that the only garanteed leak free pond would have to have a liner in this situation. I'll try to post some pictures when I visit Saturday. I'll keep you posted.


Mario Paris,
Fish & Wildlife Management Technician, CEO of Canadianponds.ca Products