Webuild’s US subsidiary Lane has started excavating the 4.2 km storage tunnel for the ship canal water quality project in Seattle, Washington, using the tunnel boring machine (TBM) MudHoney.
The environmental sustainability project is designed to prevent untreated stormwater and sewage from flowing into major bodies of water like the Lake Washington Ship Canal in Seattle.
The TBM began at Ballard, the western end of the planned 5.5 m diameter tunnel and will head towards Fremont and Wallingford.
