Chinatown Train TBM tail gunners installing piping in the SB tunnel Drill rig in the Ellis Street shaft Cutterhead installation for tunnel boring machine Mom Chung SB Tunnel S-Curve under Market Street, looking south Ruth Azawa art on Chinatown site scaffolding February 2014 CAG Meeting UMS site in Jaunary 2014 from 801 Market rooftop Lifting the rebar cage for the #2 test wall Screw auger and workers installing NB tunnel rings Pouring concrete for Chinatown station guide walls Excavation of the retrieval shaft Close-up of the bottom of test wall 2 rebar cage
Central Subway Alignment

Project Highlight

We completed an important construction milestone recently as our tunneling contractor and our first tunnel boring machine, named Mom Chung, successfully and safely tunneled under Market Street and the existing BART and Muni tunnels. The TBM is now under Stockton Street in Union Square. Find out more on our blog.

Upcoming Meetings/Events

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