Construction Update | Dec. 14-23
Underground on 4th Street, two tunnels are now in construction. Here we see the entrances to both, beneath 4th and Harrison.
During the next 10 days, Central Subway work will continue at sites in SoMa, Union Square, Chinatown and North Beach. This post contains brief updates about what is happening in each neighborhood. For more detailed information, click here or on the links below. We also post construction, traffic detour and Muni impact information on our project Google Map.
Southern SoMa (Harrison to King/Berry): We now expect to begin potholing for utilities on 4th Street between Bryant and King in January. At the tunnel launch box on 4th Street between Harrison and Bryant, tunneling continues with both TBMs.
Northern SoMa (Market to Harrison): Next week the contractor will begin restoring the work zone on 4th Street between Folsom and Harrison. The traffic pattern may change to allow for underground sewer surveys, with construction in progress in the intersection of 4th and Harrison and, tentatively, 4th and Folsom. At 4th and Folsom, work to prepare for the Yerba Buena/Moscone Station continues. Work includes demolishing the roadway within the construction zone to prepare to construct underground station walls. This work will be noisy.
Union Square: Construction is now paused on Stockton Street, resuming in January. Work will continue on Ellis Street during December to allow for ground improvements related to tunneling.
Chinatown: Work to prepare for the Chinatown Station continues within the future station site and on the adjacent section of Washington Street. On Clay and Jackson streets adjacent to Stockton Street, the contractor may be performing underground borings some nights next week.
North Beach: Construction is now paused on Columbus Avenue, resuming in January. Work will continue on private property at 1455 Stockton and 1731-1741 Powell to ensure we are ready for the arrival of the first TBM in the spring.
We appreciate your patience and support while we build this essential upgrade to San Francisco’s public transportation system.
