Friday, August 1, 2014

Reanimating Bertha, the Mechanical Behemoth Stuck Under Seattle by KIRK JOHNSON

This is a blog post from Ari Pregen's Blog



By KIRK JOHNSON


The world’s biggest tunnel-boring machine, nicknamed Bertha, is awaiting repairs, and getting it going again will be an engineering feat in itself.


Published: August 2, 2014 at 4:00AM


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http://aripregen.com








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