Ship Canal Water Quality Project - Storage Tunnel project
The Ship Canal Water Quality Project- Storage Tunnel project, located in the city of Seattle, included construction of a 2.7 mile long (4.2 km) water storage tunnel to reduce flooding Lake Washington Ship Canal with polluted water.
The project keeps 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 capture and temporarily hold wastewater and rainwater during heavy rains. Once a storm is over, the water is 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)
Photogallery
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