It's a Massey Ferguson 1040 4x4. There's water dripping off the rocks into the hollow...I'm guessing from water from higher levels. There's a few constant wet areas that encircle the hollow. I started plowing where I want to take the dam material from. I'll then use a grader blade to scrape off the topsoil to get to the good rich clay under it...probably about 12 inches down.