Tunnel construction continues beneath 4th Street with our first tunneling machine, Mom Chung. Our second tunneling machine, Big Alma, launches in the coming weeks.
During the next 10 days, tunneling and tunneling preparatory work will continue in SoMa, Union Square and North Beach. Work to prepare for station construction is continuing in Chinatown and northern SoMa.
Construction impacts are planned to change at these locations by October 14:
- Northern SoMa (Market to Harrison): All lanes are now open to traffic on 4th Street between Market and Stevenson. On 4th Street between Folsom and Harrison, the parking lane and one lane of traffic on the east side of the street will remain closed to allow for ground improvement work. On 4th Street between Howard and Folsom, one lane will remain closed to traffic south of Clementina. Demolition of the 76 gas station in progress.
- Chinatown: In Chinatown, work to prepare for station construction will continue. The turn lane from Stockton Street onto Washington Street may be closed for one day next week. Several parking spaces will be closed near the intersection of Stockton and Washington and adjacent to the future Chinatown Station site 9933-949 Stockton). The sidewalk adjacent to the building will remain closed to pedestrians.
At these locations, current construction impacts are planned to continue until
- Southern SoMa (Harrison to King/Berry): 4th Street between Harrison and Bryant may fully close some evenings and weekends to allow for the installation of tunneling components and piping. Two lanes of traffic will remain open at all other times. Contact us at firstname.lastname@example.org if you have questions about the closure schedule. On Bryant Street at 5th Street, the left lane and several parking spaces will remain closed. One lane of the I-80 off ramp at 4th and Bryant may be closed at times to allow for utility work.
- Union Square: Stockton Street between Geary and Ellis will remain closed to vehicle traffic. Ellis Street between Stockton and Powell will remain closed to westbound traffic.
- North Beach: Construction of a retrieval shaft, to be used to remove two tunnel boring machines, is commencing at the Pagoda Palace site. Crews are installing monitoring instruments and building a sound wall that will buffer construction noise. Construction hours are Monday to Saturday, 7 a.m. to 7 p.m. All local roadways will remain open. Parking and walkways may be impacted in front of the Pagoda Palace property.
We appreciate your patience and support while we build this essential upgrade to San Francisco’s public transportation system.