There is a 40' wide 12' tall stone (quarry?) wall at the back edge of my property. On the top of the wall and heading back 120' is the backyard of the people behind me (they can stand on the edge of the wall and see my property below. The wall has been there since the late 50's. When it was built, they used a small pulley crane, and the rocks were perfectly cut to match and laid on top of each other (straight up and down). Therefore they were not binded together (no need because it was solid).

The wall is now covered in ivy with a couple small trees growing out of it. I'm nervous about it's structure. Should I be? (I have no idea about these types of things). Whom or What type of professional contractor can I have to come out and inspect it for safety? It's probably safe, but this year I will be working at the base of it to remove all kinds of under brush and weeds on about a 5' strip of land (that sits behind a fence). I'm nervous about some sort of rock slide, or pulling one of the trees out. It's not bowing excessively, but it has shifted over the years just a tiny bit. How can I remove those trees safely from the crevices? Do you think it's safe to work underneath to clear the brush? (to whom can I ask?). Is it still a solid structure?

-Joe