Ship Canal Water Quality Project - Storage Tunnel project
The Ship Canal Water Quality Project- Storage Tunnel project, located in the city of Seattle, consists of building a 2.7 mile long (4.2 km) 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 (about 276 million liters) of contaminated rain water and waste water out of the Canal, from Salmon Bay and Lake Union.
The 4.2 km tunnel will capture and temporarily hold wastewater and rainwater during heavy rains. Once a storm is over, the water will be released to a treatment plant.
Contractor: The Lane Construction Corporation (U.S. subsidiary of the Webuild Group)
Project KPI
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tunnel length
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Polluted stormwater and sewage prevented from entering waterways (litres/year)
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Storage capacity (liters)
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