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Into the hole we go

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Projected tunnel path

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A welder puts the finishing touches on a pipe

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The TBM Mom Chung boring machine sits, ready to work

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A close up of the teeth that will dig away at the dirt under SF

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The entrance to the tunnel near Hotel Utah

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A planning group

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A worker attaches some parts to be lowered into the tunnel

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Job site scene

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Right now, the tunnel is full of machinery, mud and workers

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The back of the TBM Mom Chung, boring machine

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TBM Mom Chung baring machine

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TBM Mom Chung boring machine

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The front of the TBM Mom Chung boring machine

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Another close up of the teeth on the machine

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The massive TBM Mom Chung boring machine

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Scenes of the job site

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Scenes of the job site

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Scenes of the job site

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Scenes of the job site

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We went underneath San Francisco to bring you an update of the Central Subway Project, slated to be finished in 2019. 

The current construction will provide a much needed direct transit link between North and South San Francisco, connecting old SF (Chinatown, Financial District, and SOMA) to new SF (Bayshore and Mission Bay). 

The first tunnel excavating machine has just arrived and four new stations will eventually be constructed. A map of the project details the final route. Check out what it takes to get this dirty job done! For more details and information, click here. 

Map provided by the SFMTA