kersplooshMA to

EngineeringEnglish · 2 years ago

Front view of Bertha, once the world's largest tunnel boring machine

www.thestructuralengineer.info

3

59

Front view of Bertha, once the world's largest tunnel boring machine

www.thestructuralengineer.info

kersplooshMA to

EngineeringEnglish · 2 years ago

3

Bertha was custom built to dig the State Route 99 tunnel under Seattle. It dug under the city (off and on) from December 2013 to April 2017.

Wikipedia link for more info

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Aes Sedai@lemmy.world
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2 years ago
Here’s the world’s biggest TBM.

Tuen Mun-Chek Lap Kok
hemko@lemmy.world
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2 years ago
Boring.
darcy
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2 years ago
Boring.

Engineering

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