Those are left over from clearing my lot. They are on the next lot. I imagine I could ask and use some of it, otherwise it will just be used when/if they ever sell the other 2 lots. There is a bunch of rocks and debris mixed in too. There are 3 building lots along the pond behind my house. We bought the adjacent lot behind us because the price was right and it will give us access to state land as well. If someone else had bought it we would have not been able to cross it. The pictures don't show a lot, but there is enough debris and uneven areas to keep me from being able to mow it eventually.