Just an update. I last checked the pond level on the 12th. Today the 21st. It's down another inch and a half. So, overall down 17.5" since it was full back in August. Very little rain since then. Maybe 1" total. The leak by the pipe is, of course, stopped because the level has dropped below the pipe.
The leak through the core, at the base of the dam, is still a very small seep. No noticeable current, but there is moisture behind the dam.
Any opinions welcome, in regards to fix.
Thanks
Jeff

9 yr old pond, 1 ac, 15' deep.
RES, YP, GS, FHM (no longer), HBG (going away), SMB, and HSB (only one seen in 5 yrs) Restocked HSB (2020) Have seen one of these.
I think that's about all I should put in my little pond.
Otter attack in 2023