11th and M St, NW
This building is at the northeast corner of 11th and M St NW (street address is 1017 M St NW). A new 9-story (or so) residential building is being constructed on the lot that wraps around this building (most recently a surface parking lot). Over the past two months they have done excavation, pile-driving, and pouring concrete for the basement levels.
As you can see in the second and third pictures, a crack has developed separating the side wall from the remainder of the building at 11th & M. At 11:30 DCFD had blocked off both 11th and M St to secure the site. By 12:15 they had left, but there is now security tape roping off sidewalks on both 11th and M, and M St is still blocked. Meanwhile, a crew from the residential construction project has shown up, apparently studying how to stabilize this building and prevent it from collapsing into their open basement construction site.”