I`ll try and answer the questions that Dave asked. Surface area,, about 1 acre. More if I can keep the wife away while digging. Various depths to 10 or 12 ft? I will be a dug pond on a slight slope with a long dam along the back side. Water supply is from runoff from the slope. Aprox 5 acres of runoff. Bedrock,, we have dug 10 ft so far in areas and seen NO rock. Amazing for Wilson Co TN. Its been 24 inchs topsoil then red clay. Test pits. We dug 10, saw no ground water. I will add a picture that will show you alot more if someone will tell me how. Thanks guys for all your input.