Here's what it looks like from the back of the dam. Water isn't running, but really looks like it's coming out at the base of the dam. If it's not moving, would dye work on trying to determine where it originates in the pond?

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