In April the Joint Venture Webuild Group /Lane Construction  completed excavation of the EUR 477.53 million (USD580 million) Northeast Boundary Tunnel (NEBT) project in Washington, D.C 

The TBM EPB Chris completed the combined sewer outflow (CSO) tunnel being built to improve the water quality of the Anacostia River in Washington, D.C. The NEBT tunnel, 7 m (23-feet) inside diameter, 8.2 km (27,700 feet) long and lined with 4,442 rings, extends from the Robert F. Kennedy Stadium to R Street, NW near downtown D.C.  

The April 2021 hole-through milestone at the R Street shaft comes almost one year after Chris reached the W Street shaft, the first and only in-line shaft that the TBM crossed during its 26,700-foot-long drive beneath Washington, D.C. 

The project is the largest component of the Clean Rivers Project, a greater initiative being led by DC Water, which will provide a complete system where sanitary and storm water from local jurisdictions is treated before being discharged into the Anacostia and Potomac Rivers. Once the project is fully completed, the NEBT will increase the capacity of the existing sewer system to help manage flooding due to weather events, a problem the District has been experiencing for decades. Click here and us/109 for the tunnelbuilder archive. Visit https://www.webuildgroup.com/en/ and https://www.laneconstruct.com/. 19/21.