Transbay Transit Center work progressing
John King
The San Francisco Chronicle
Monday, December 24, 2012
The biggest hole San Francisco has ever seen is being carved into an area between Second and Fourth streets, as round-the-clock work progresses to build San Francisco's new train terminal. Photo: Lacy Atkins, The Chronicle
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For now, the brunt of the physical task is borne by the 150 or so workers toiling weekdays in around-the-clock shifts on the methodical excavation of the three-block-long space that will contain the rail platforms, concourse and train tracks for the terminal set to open in 2017. And even though work began in earnest more than a year ago, nothing structural will appear above ground before the spring of 2014.
The new center will be roughly a quarter mile long and 70 feet high, with a spidery glass form extending above First and Fremont streets. The aboveground portion will serve bus passengers as well as provide shops, circulation areas and a rooftop park.
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"What you see is pretty standard around the world, this kind of deep horizontal bracing," Beck says before he and Adams lead a reporter down 82 steps within rickety scaffolding to the bottom of the artificial short-term canyon.
The scale is what makes things complex.
Both First and Fremont streets, for instance, now are bridges as they pass above the deepening hole. They rest on trestles that were installed over holiday weekends, a time when little traffic was heading through the Financial District.
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"A year from now, on the street, you won't see much," Beck says. "With projects like this, you spend half the entire time below ground. Then the steel seems to go up overnight."