No Edis today, but I jackhammered for a couple hours, had lunch with my friend Jim, then jackhammered all afternoon. Gone is the brick retaining wall, the top of a concrete retaining wall, and more bits and pieces. Getting close to being done with jackhammer, I think. Just some sidewalk and an already-cracked retaining wall to get through.
It became clear why unreinforced masonry is bad for earthquake country. A double-wide brick wall came apart with surprisingly little force, and a lot less force than needed for a thinner concrete wall.