Lake, ALL earthen ponds leak! You may also want to consider the cost of bringing in, and tilling in properly, Sodium Bentonite clay. Some clumping Kitty Litter's are also made from Sodium Bentonite. As a caveat for Bentonite, it has to be disked in and added in the proper portions to be effective, yet when done right, is exceptional in sealing ability.

Last edited by Rainman; 05/17/14 07:43 PM.