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Bertha tunnel project
[64] Tunnel boring was completed on April 4, , [4] and the finished tunnel See more. By September 30, , Bertha had tunneled 4, feet (1, m), surpassing the halfway mark of the planned 9,foot (2, m) distance. [63] As of December 15, , the tunnel length reached 70% completion. Bertha was a foot-diameter ( m) tunnel boring machine built specifically for the Washington State Department of Transportation's (WSDOT) Alaskan. Wikipedia is a free online ecyclopedia and is the largest and most popular general reference work on the internet. . Search for bertha tunnel project in the English version of Wikipedia. [64] Tunnel boring was completed on April 4, , [4] and the finished tunnel opened to traffic on February 4, [65]. By September 30, , Bertha had tunneled 4, feet (1, m), surpassing the halfway mark of the planned 9,foot (2, m) distance. [63] As of December 15, , the tunnel length reached 70% completion. The . The 2-mile tunnel opened to drivers in February Timeline - Project status Completed Funding $ Billion What to expect The SR 99 Tunnel is open to drivers. After nearly four years underground, Seattle's beleaguered boring behemoth clawed its way into daylight yesterday. Apr Bertha has broken through.