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Excavation Complete on NEBT Project in Washington, D.C.

MEDIA CONTACT: Lauralee Heckman 203-439-2153

CHESHIRE, CT – Excavation of the Northeast Boundary Tunnel (NEBT) in Washington, D.C., a joint-venture project valued at $580 million being constructed by The Lane Construction Corporation and its parent company, Webuild Group (formerly Salini Impregilo), is complete.

The Earth Pressure Balance Tunnel Boring Machine (TBM) “Chris” has completed the combined sewer outflow (CSO) tunnel being built to improve the water quality of the Anacostia River in Washington, D.C. The 23-foot inside diameter tunnel was successfully completed with about 27,700 feet excavated and 4,442 rings installed. The tunnel starts at RFK Stadium and ends at 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. The Anacostia River Tunnel project, the first component of the Clean Rivers Project, was also constructed by the Lane-Salini Impregilo joint-venture team.

Just this past week, Lane lowered TBM “MudHoney” into a shaft in Seattle to start excavating the storage tunnel for the Ship Canal Water Quality Project in Washington. It’s another project currently being developed by Lane in the clean water sector that, too, will prevent millions of gallons of polluted stormwater and sewage from entering the local water resources each year. Webuild, a global leader in the clean water sector, and Lane are committed to providing solutions for the sustainable management of water, such as treatment and desalination plants, and hydraulic tunnels.

About Lane Construction

The Lane Construction Corporation is one of America’s leading construction companies, specializing in large, complex civil infrastructure. For 130 years, it has contributed to the development of the country’s transportation systems including the Interstate Highway and a vast network of roads, bridges, airports, metros and railways. Lane specializes in mobility, tunneling, water and wastewater treatment plants to address sustainable development and climate change adaptation challenges. It is also a pioneer in project delivery methods and the use of design-build and public-private partnerships. Lane projects include the C-43 West Basin Storage Reservoir in Florida, an Everglades restoration effort; I-10 Corridor Express Lanes in California; the LYNX Blue Line Extension in North Carolina; the Anacostia River Tunnel in Washington, D.C.; the I-395 Express Lanes Extension in Virginia; and the Unionport Bridge Replacement in Bronx, New York. Based in Cheshire, Connecticut, it is wholly owned by Webuild, a global infrastructure group. For more information, visit For more details about the parent company, visit

About the Webuild Group

Webuild, the new group born in 2020 from Salini Impregilo, is a leading global player in the construction of large, complex projects for sustainable mobility, clean hydro energy, clean water, green buildings, supporting clients in achieving sustainable development goals (SDGs). The Group is the expression of 115 years of engineering experience applied in 50 countries on five continents with 70,000 direct and indirect employees from more than 100 nationalities. Recognised for five years by Engineering News-Record (ENR) as the world leader in water infrastructure (such as dams, hydraulic tunnels, water and wastewater management, and water treatment and desalination plants), it ranks since 2018 among the top 10 in the environment sector and it is also leader in sustainable mobility (especially metro and rail lines, in addition to roads and bridges). A signatory of the United Nations Global Compact, the Group’s expertise is displayed in projects such as the M4 metro line in Milan, Grand Paris Express, Cityringen in Copenhagen, Sydney Metro Northwest, Red Line North Underground in Doha, Line 3 of the Riyadh Metro and the high-speed railways in Italy. Other 2 projects include the new Genoa Bridge and the Gerald Desmond replacement bridge in Long Beach, California, the expansion of the Panama Canal, the Snowy 2.0 hydroelectric power station in Australia, the Rogun hydroelectric dam in Tajikistan, the Anacostia River and Northeast Boundary tunnels in Washington, D.C. and the Al Bayt 2022 World Cup stadium in Qatar. In 2020, the Group’s total order backlog reached €41.7 billion, with 89% of the backlog of construction orders involving projects that support the SDGs set by the United Nations. Webuild, subject to direction and coordination by Salini Costruttori SpA, is headquartered in Italy and is listed on the Milan Stock Exchange (Borsa Italiana: WBD; Reuters: WBD.MI; Bloomberg: WBD:IM).

Categories: Press Release