Nice concept for a pond, Can't wait to see it done!
I have a little story to tell you and it almost cost me my live and my family.
I am a certified soil tester and on 06/26/06 i was buried in a hole just like the one you are sitting in with no fissures, no cracks and no standing water, nothing to indicate that the ground would cave in on me and snap my body in 2 leaving broken bones, torn ligaments and the memories of being trapped for 3 hours before they could get me out, my left leg now has a rod from my hip to my knee for life, my left shoulder had to reconstructed with wire, screws and pins and those have to stay for life, i can go on and on and the pain is for life. Also that same day 3 other men lost their lives to the same hole, and all of our families suffered. Besides, kids have a way of taking off and doing whatever they want when they want. That doesn't make them smarter than the parents, that just makes them kids. They have to learn from their mistakes, but the adults should make sure that areas under construction are sectioned off the way they are supposed to be. That way, no one gets hurt. Kids don't always pay attention to what they are doing, so there is no reason to blame the adults for it. I know, I have 5 boys.