'Bar' as in the 'stick.' \:\)

No, the leaking is not part of the dam, it's on the side of the pond (25+ feet from the dam). Yes, when the dam lowers I can hear and see where it's going out. It's about a 4" diameter hole. I was going to embed a couple miniaturized pictures but I'm not sure how to do it. Is there any way to attach a small pic to my post?

No, there aren't any native rocky areas (at least that I know of) that are integrated into the pond (though the soil on that side of the pond does appear to be more sandy).

I appreciate the bump!