Owner was trying to excavate a basement. Party wall slid down the hole and brought floors with it; both the owner’s and the neighbors. DCRA had to take the roof off with a crane. The arch is the only thing keeping both houses from total collapse.
Lesson for anyone thinking of excavating their crawlspace into a full basement: don’t dig a 12 foot deep hole under your house.”
This is on the 200 block of Morgan St, NW near Dunbar High School.
We looked at a successful basement dig out here.
A couple more photos after the jump.