Thursday, December 4, 2014

Downtown San Francisco: Central Subway Project

Alignment Map

Da Route... for now
(Excerpt) "The 1.7-mile Muni Metro line will run above ground from the Caltrain station at Fourth and King streets to Bryant Street then underground to Washington Street in Chinatown, with stations at Fourth and Brannan streets, Moscone Center, Union Square and Chinatown."

Future track extension and station construction is being considered to supplement this Central Subway alignment.

Anticipated Opening Date
(Excerpt) "When opened in 2019, the Central Subway will provide a much-needed connection between major employment, retail, cultural and residential areas of the city."

Underground Construction -- a big bore.

"Mom Chung"
In above photo, the front end of this Tunnel Boring Machine (TBM) is shown at subway construction. Apparently, this TBM has a name: "Mom Chung."

How to Build a Subway Tunnel -- a condensed version.
(Excerpt) "Using time-lapse cameras installed underground, we’ve condensed the first months of tunneling into this captivating two-minute video. In the video, Central Subway crews assemble tunnel boring machine (TBM) Mom Chung and drive the state-of-the-art tunnel builder north under 4th Street to build San Francisco’s first new subway line in decades. The video shows the TBM assembly process, installation of the first tunnel rings, removal of excavated ground spoils, [pouring concrete,] and other aspects of the complex tunneling operation.

By the end of the video, Mom Chung has tunneled from her launch box south of 4th and Harrison to 4th between Folsom and Howard. Since we captured this footage, she has mined much farther north, crossing successfully and safely under Market Street and the existing BART and Muni tunnels... .

We thank our tunneling crews and tunneling contractor Barnard Impregilo Healy for their hard work to build the Central Subway, extending the Muni Metro T Third Line through SoMa, Union Square and Chinatown. Stay tuned for more time-lapse videos as construction proceeds."

Source: CentralSubwayBlog, 12.4.2013

On Topic:
Regarding the blog writers at the "Central Subway Blog;" in my opinion, that was an excellent use of time-lapse technology. It must be nice to actually have video production as a line item in your budget -- just guessing here at the "Give Me a Moment Blog."


GIVE ME A MOMENT a lifestyle
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