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August 29, 2014

Bertha's pit gets down to last pile

Seattle Tunnel Partners said the last pile that will make up the rescue pit for the stuck tunnel boring machine will be installed by the end of the week.

Crews will install additional piles near the pit as part of the support system for the large modular crane that will hoist the machine's broken 2,000-ton cutterhead and drive unit to the surface for repairs.

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