DC Water North East Boundary Trunk Sewer

Washington, DC


Structural Technologies



In 2014, a five-story residence was constructed directly over DC Water’s North East Boundary Trunk Sewer (NEBTS) with only about 2 ft of soil between the bottom of the basement and the top of the 22-ft dia. masonry sewer. DC Water inspected the century-old NEBTS and found longitudinal cracks at the crown. SGH helped DC Water and the repair contractor by evaluating the structure before and after the repair, designing emergency repairs, and inspecting the finished work.