Ship Canal Water Quality Project - Storage Tunnel project
The project, located in the American city of Seattle and known as the Ship Canal Water Quality Project - Storage Tunnel project, consists of building a 2.7 mile (4.2 km) long water storage tunnel to reduce flooding Lake Washington Ship Canal with polluted water.
The Lane Construction Corporation, the US subsidiary of Webuild Group, is building the project that will keep an annual average of 75 million gallons (276 million liters) of contaminated rain water and waste water out of the Canal, from Salmon Bay and Lake Union.
The TBM (tunnel boring machine), assembled and tested in Germany, will reach Seattle after the construction of a 4.2 km tunnel. It started excavating in mid-2021.
Contractor: The Lane Construction Corporation (U.S. subsidiary of the Webuild Group)
Technical data
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tunnel length
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litres/year the avarage storage capacity
Photogallery
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Sustainability KPIs
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Waste water into the canal per year
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m3 of combined sewage conveyed per year
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people in the catchment area