I have drained my pond once again in my attempts to get it filled lol. I noticed that some of the area has great clay then I hit water and sand. It's kinda greyish sand/clay material. I also noticed there is a spring I just located about 35 yards from my pond that is starting to go dry. Is that what it is, a spring? I'm thinking about digging a trench then filling the entire side with clay to kinda cut it off. Also I dug down a little and saw a redish like tree stump. I have only pine trees round here and it came up 4 feet underground like it is prehistoric or something. It also had the clay/sand around it. How deep does i guess you call it a aquifer go?