Brad, I am in Driftwood TX which is not far from Blanco and I am in a similar situation as you've described. I have a 1.3 acre pond ranging in depth from 5'-9' feet when full. My pond leaks badly, 4 inches per day until a certain point where it slows down considerably. I don't know if it is just leaking out of the dam or if it is also seeping through the bottom. I can't seem to anyone around here to give me solid advice on how to repair it. I just got the phone number a local guy who does this type of work and am waiting to hear back from him. I would be interested in knowing how you resolved your leak.
