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United States, Washington - us/69

Seattle Road

FHA approval of initiation of design/construct contract for 2.7 km-long tunnel to replace earthquake damaged Alaskan Way viaduct, value EUR823 million (USD1.09 billion), by Seattle Tunnel Partners jv comprising DragadosUSA/HNTB/TutorPerini/Coluccio/Mowat. Contractor will use 18.46 m-diameter EPB through mix of fill soil, clay, glacial till and boulders at depths to 64 m from Sodo to South Lake Union. More from tunnelbuilder archive us/69. Visit www.perini.com and www.wsdot.wa.gov/projects/viaduct. 38/11.