Sinking soil near tunnel dig may have damaged water pipes, could cost millions
SEATTLE -- The Big Bertha boring machine that is supposed to be digging Seattle's waterfront tunnel to replace the Alaskan Way Viaduct is about a year behind schedule. But the timeline is taking a backseat to public safety concerns. The soil around the project near the viaduct is sinking. On Monday, Seattle Public Utilities told the City Council that the water pipes underneath First Avenue South near Pioneer Square may be damaged because of it.