07 June 2012 ~ 1 Comment

Preparing for the Central Subway Tunnel: Major Work Commencing Next Week

At the site of the tunnel launch box, crews are constructing shallow, below-ground walls to prepare for the major upcoming excavation. Next year, a pair of tunnel boring machines (TBMs) will begin excavating the Central Subway tunnel, building the backbone of Muni’s extension of the T Third Line through vibrant and bustling SoMa, downtown, Union […]

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