Back from the country, took some pics and some rough measurements with the laser level (batteries must have been low very weak line), also inspected the back of the dam for leaks, and all looked good.
The creek below the dam where the drain pipe drains, was a rusty residue.
I don't think there is a leak, I think it has settled and this being the thickest part of the dam, it has settled more than the rest of the dam.
I drew a rough sketch of the problems and some of the measurements I got, and will be getting the pics I took posted as soon as my dumb self can get them from the camera to the computor and in to a post,lol.
Well i'm having problems posting the sketch too.
