can you drop large loads of clay on the front side.i do not normally do this,but over time it too will settle and add something to the front side.i just have not had alot of luck with fixing leaks from back side of dam.i think over time your water will come out in a different place.however,one time we added clay to front side of a dam and on top of dam and kept packing with track hoe and we did seal this pond.good luck.
