Mfitzs70, I must have used the term incorrectly. I meant that the pond was dug with the intentions of runoff/water shed filling it up.

I spoke to the original grader who built the pond and he said it only made it to half pool before he stopped checking on it. He also wanted 6-10K to redo/fix it. I passed on that offer. I wanted to pump water into it to see if it would hold water before I spent additional money on the pond.

I planned to use a pump to fill it and keep it topped off, so that cost was a given. If it keeps leaking, then I will address remediation. It looks like my options are ESS-13, Soilfloc, WaterSave Seep or Plug, Bentonite, or better clay compaction.