The dam is 100% yellow clay, no top soil at all.
The key way is 8 feet deeper than the dam and 12 feet wide.didn't use a roller but I think the D9
dozer did a fair job of compacting. All top soil was placed over the dam after it was completed.
We never hit bedrock or shale, not even a gravel pocket. Can't figure out why its leaking. My contracter has been building ponds and lakes for 10+ years and can't figure it out either. It's only been full 3 months but wouldn't think it would seep this much.

I'll start treating my wife as good as my dog when she starts retrieving ducks.
http://geocities.com/h20fwlkillr/