I started a DIY project last fall to renovate an old 1/4 acre pond into a new 2 acre pond. Without going into all the details, I got caught short by the fall rains and was unable to finish. I lowered the spillway to accomodate the reduced dam height until I could get back to it this spring.

Well, I started back to it this past weekend and found significant leaks in one corner of the dam. I'm attempting to plug those leaks by adding layers of clay to the backside of the dam...can't do anything about the front side because it is under water. This seems to be working, but I'm still a bit nervous...anyone repaired a dam in this manner? From the backside? Thanks in advance for any comments.