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With one of the largest cranes in the U.S. now at work, the BART Silicon Valley Phase II project enters a pivotal stage.
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The $1.97 billion contract will extend the Q train to 125 Street, bringing long-promised subway access to East Harlem by 2032.
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Twin tunnel boring machines will begin by tunneling parallel underground sections between the future Wilshire/La Brea Station and the current Wilshire/Western Purple Line terminus.
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Angeli, the tunnel boring machine, was lowered into the ground near 1st and Central in late 2016 and began digging the tunnels in early February.
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At the event Board Chair Fasana awarded TAP Cards to students who won contests to name the TBM and create an illustration for its tail shield.
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Crossrail'ss final tunnelling machines, Elizabeth and Victoria, are being dismantled 131 feet below Farringdon in central London following the completion of Crossrail tunnelling.
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The Prime Minister and Mayor of London Boris Johnson celebrated the completion of Crossrail's tunnels by going 40 metres below the capital to thank the men and women who are constructing the new east-west railway.
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Two TBMs excavated and constructed the Central Subway’s 1.5 mile-long tunnels at an average pace of 40 feet per day and will be retrieved in North Beach at the site of the former Pagoda Palace Theatre on Powell Street.
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Beginning Tuesday, Big Alma was set to be in operation 24 hours a day to build the approximately 425 feet of new tunnel beneath the Market Street tunnels.
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This animation shows exactly how the 110-ton, 300-foot-long tunnel boring machine will drill a distance of nearly two miles, 100 feet beneath the New York Harbor seabed.
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