CHESHIRE, CTThe Lane Construction Corporation, the U.S. subsidiary of Salini Impregilo Group, has won its first contract in the state of Washington to build a water storage tunnel to reduce polluted overflows into the Seattle, Washington Lake Washington Ship Canal. The contract is valued at $255 million.

Sewage and stormwater from many older parts of the City of Seattle, including the Ballard, Fremont, Wallingford, and Queen Anne neighborhoods, is collected and conveyed in one set of pipes. In dry weather conditions, all sewage flows to a local wastewater treatment plant. During wet weather conditions, polluted runoff can exceed the pipes’ capacity and send a mixture of stormwater (90%) and sewage (10%) to outfalls that flow into the nearest water body. These combined sewer overflows, or CSOs, contain contaminants that can make people sick and harm fish, wildlife, and the environment.

The 2.7-mile, 18’10” internal diameter tunnel, known as the Ship Canal Water Quality Project –Storage Tunnel project, will keep more than 75 million gallons of polluted stormwater and sewage out of the Lake Washington Ship Canal, Salmon Bay, and Lake Union on average each year.

Construction work is expected to start December 2019 and be completed in 2023.

Lane, along with parent company Salini Impregilo, is currently working on other CSO projects around the country to prevent future polluted overflows in nearby water resources including: the Northeast Boundary Tunnel (NEBT) in Washington, D.C., valued at $580 million; the Dugway Storage Tunnel in Cleveland, Ohio, valued at $153 million; and the Three Rivers Protection & Overflow Reduction Tunnel (3RPORT) in Fort Wayne, Indiana, valued at $188 million.

The company also does work in other sectors including highways, bridges, rail, metro, and mass transit. Key ongoing projects include I-10 Corridor Express Lanes in California; Unionport Bridge in Bronx, New York; and the Purple Line Light Rail Extension in Maryland.


About Lane Construction

The Lane Construction Corporation is one of America’s leading construction companies, specializing in large, complex civil infrastructure. For nearly 130 years, it has contributed to the development of the country’s vast network of roads, highways, and bridges, including the Interstate Highway System. Lane also specializes in tunnels, metro and railway systems, as well as airports and water and wastewater treatment plants. Lane is a pioneer in the use of design-build and public-private partnership methods of project delivery. Its main projects include the I-10 Corridor Express Lanes in California; the I-395 Express Lanes Extension in Virginia; the Unionport Bridge Replacement in Bronx, New York; the Purple Line Transit Systems in Maryland; and the Anacostia River Tunnel in Washington, D.C. Based in Cheshire, Connecticut, it is wholly owned by Salini Impregilo, a global infrastructure group. For more information, visit For more details about its parent company, visit


About the Salini Impregilo Group

Salini Impregilo is one of the major global players in the construction of large, complex civil infrastructure. For five years it has been ranked No. 1 in the water infrastructure sector by Engineering News-Record (ENR) and as of 2018 has achieved ranking in the Top Ten of the Top Environmental Firms. It is also a leader in the transport infrastructure sector, being involved in major sustainable mobility projects in rail and metro systems around the world. It has successfully built some of the world’s most iconic projects: bridges, roads and motorways, civil and industrial buildings, and airports. The Group has 113 years of engineering experience on five continents, with design, engineering and construction operations in nearly 50 countries and more than 35,000 employees from over 100 nationalities. It is a signatory of the United Nations Global Compact as it pursues the sustainable development goals of its clients, from clean water and energy to sustainable mobility to buildings with a low environmental impact. Its expertise is displayed in projects such as the Grand Paris Express metro system, Cityringen in Copenhagen, Sydney Metro Northwest, Red Line North Underground in Doha and Line 3 of the Riyadh Metro. Other projects include the expansion of the Panama Canal, 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 2018, new orders totalled €6.0 billion, with a total backlog reaching €33.4 billion. Salini Impregilo Group is headquartered in Italy and is listed on the Milan Stock Exchange (Borsa Italiana: SAL; Reuters: SALI.MI; Bloomberg: SAL:IM).