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Mysterious 'unknown object' blocks progress of huge drilling ...
A mysterious object has blocked the world's largest tunneling machine from finishing an underground highway in Seattle. The drilling machine know as Bertha – at five stories high and operated by a crew of 20 people - struck something it couldn't bore through on December 6 and has been unable to make any progress since.
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Tunnel - Wikipedia
Much of the early technology of tunneling evolved from mining and military engineering.The etymology of the terms "mining" (for mineral extraction or for siege attacks), "military engineering", and "civil engineering" reveals these deep historic connections.
Alaskan Way Viaduct replacement tunnel - Official Site
One year ago, with a roar of water and concrete tumbling, the tunneling machine Bertha broke through into the disassembly pit, completing her 1.7-mile journey under downtown Seattle.
Pictured: The world's most powerful tunnel-boring machine ...
Engineers are still desperately trying to rescue the world's largest tunneling machine that is stuck under the city of Seattle. Bertha, a five story-high drilling machine that was custom-built to drill the Alaska Way, ground to a halt in December after stopped by an 8-inch diameter steel pipe. But ...
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The World's 25 Most Impressive Megaprojects
The World's 25 Most Impressive Megaprojects. The biggest and boldest projects on the planet.
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Norway's Bold, Maybe Foolhardy Plan to Build the World's ...
At 165 feet tall and 188 feet wide, the proposed tunnel will be big enough for a 35-million pound ship to pass through.
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4 to no avail. "Prague," the Fuhrer responds stubbornly, almost mystically, "is the key to winning the war."Generaloberts Heinrici's hard-pressed troops must "do without."
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Warning, spoilers ahead. Rasselas doesn't get out until chapter 15. His favorite sister, Princess Nekayah, comes along. They spend 33 chapters searching for the secret of happiness.
Primarily a "railroad" Blog — but easily distracted by subjects which I find fascinating!
Alaskan Way Viaduct - Follow Bertha
Follow Bertha Thank you for following Bertha. The SR 99 tunneling machine, nicknamed Bertha, has completed her work. For the latest tunnel progress, visit our new tracker page.
Under Seattle, a Big Object Blocks Bertha. What Is It? - The ...
Dec 19, 2013 · In October, workers walked through the first rings of the highway tunnel being built under Seattle's waterfront toward the boring machine called Bertha.
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CNN Student News with transcript and subtitles, Feb 17-20, 2015
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World' s Work magazine proudly reported in ... the workers tunneling for William McAdoo were ... was the hit of revolutionary Boston, a collection of two plays ...
Bertha – The Tunnel is Finished, but Her Legacy Continues ...
The Tunnel Boring Machine ("TBM") known as "Bertha," built by Hitachi Zosen Corp in Osaka, Japan, was the world's largest TBM at 57.5 ft. in diameter.
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10 of the Largest and Strangest Machines in the World ...
5. The Largest Ship in the World. The Emma Maersk has had to surrender its reputation as the largest floating vessel in the world to make way for the Prelude, that took to the waters for the first time in South Korea.
The World's Largest EPB Shield Tunneling Machine | Hitachi ...
<Topics> The world's largest shield tunneling machine was officially named Bertha on December 20, 2012.
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