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- Bertha marks historic breakthrough in Seattle
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- 18-19 April: SEACETUS, Malaysia
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Workers eclipsed by Bertha's cutterhead size
Workers eclipsed by Bertha's cutterhead size
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From the Editor's Desk - 06 Apr 2017
Breakthrough this week of the 17.48m diameter Bertha TBM in Seattle is a great achievement for the industry. It is validation of the original concept that a bored tunnel alternative was possible at the diameter needed, and under the streets and through the glacial deposits of Seattle. It is also a well-earned reward to all involved for keeping the faith and maintaining the determination to get the machine through to the end of its assigned task.
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VIDEO REPORTING - Following Bertha and the Seattle highway tunnel project

Hyperbaric maintenance work

Bertha ready for restart

TBM Bertha repair strategy

Bertha's bearing seal issues

Tour of record setting TBM

Launch of world record EPBM

Mega EPBM tested in Japan

Bertha’s bored alignment