Bob,
Thanks for your interest! I sent you a message this evening.
Bobad - Your message Saturday pretty much nailed it right on the head. The sand got really thick right before he hit the gravel. Also, I didn't see the gravel hole until Saturday morning. That's when I saw it half full of water and I thought - uh-oh! Easy come easy go?
Eastland - Man! Like Sunil said, you painted a damn good picture! Unfortunately, I only have 17 acres. I gotta leave at least part of it to build a house and yard on or my wife would kill me!
My first and only pond doesn't even have water in it yet and I'm already dreaming about expanding it or connecting it to a second one.
I almost couldn't sleep the other night thinking about "what lies beneath" ... the clay.
I'm glad all of you experts were there to give me advice and let me know I made the right decision.
Thanks! I'll post a message later this week showing the start to finish of my pond.