Crews working on the sewer separation project on Main Avenue yesterday damaged the foundation of the building housing the north end post office facility.
The work was being conducted in the alley adjacent to the building.
The buildings in that block were evacuated due to a concern about the integrity of the building. A couple of hours later a portion of the back corner of the building began to collapse a controlled demolition of that corner of the building was conducted.
Once the site was deemed safe from further collapse the emergency crews left the scene.