Construction Index TV

Tue November 28 2023

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Bertha's front end rises to the surface

Seattle Tunnel Partners lifted the 2,000-ton front end of Bertha, the SR 99 tunneling machine, to the surface for repairs on March 30, 2015. This time-lapse video shows the lift from a spot just north of the tunnel access pit.

Video uploaded on 01/04/2015 03:48pm.

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