Pedestrians cross the street near the Union Square construction site. During the next 10 days, construction to prepare for tunneling will continue in SoMa and Union Square. No Central Subway construction is planned in Chinatown or North Beach. For descriptions of construction impacts in each neighborhood, click here or on the links below. We also [...]
A worker prepares a concrete cylinder for installation underground. The cylinder is one component of a wall that will eventually be integrated into the Union Square/Market Street Station. During the next 10 days, construction to prepare for tunneling will continue in SoMa and Union Square. No Central Subway construction is planned in Chinatown or North [...]
Crews continue to install subsurface pipes on 4th Street between Market and Stevenson. When the tunnel boring machines pass below, we will use to inject grout into the ground and improve soil conditions here. During the next 10 days, construction to prepare for tunneling will continue in SoMa and Union Square. No Central Subway construction [...]
Crews are excavating a shaft on Ellis Street near where the Central Subway tunnels will pass beneath the existing BART and Muni tunnels. Crews will perform ground improvements here. During the next 10 days, construction to prepare for tunneling will continue in SoMa and Union Square. No Central Subway construction is planned to occur in [...]
On Ellis Street, crews continue to excavate and stabilize a shaft that will be used to perform ground improvements. During the next 10 days, construction to prepare for tunneling will continue in SoMa and Union Square, and we will perform a soil boring in North Beach. No Central Subway construction is planned to occur in [...]
Construction of underground walls is in progress on 4th Street between Howard and Folsom. During the next 10 days, construction to prepare for tunneling will continue in SoMa and Union Square. No Central Subway construction is planned to occur in Chinatown or North Beach. Descriptions of construction impacts in each neighborhood are available here or [...]
Beneath 4th Street, crews are pouring concrete to build the floor of the tunnel launch box between Harrison and Bryant. During the next 10 days, construction to prepare for tunneling will continue in SoMa and Union Square. No Central Subway construction is planned to occur in Chinatown or North Beach. Descriptions of construction impacts in [...]
On Ellis Street, crews are excavating this shaft to perform ground improvements. During the next 10 days, construction to prepare for tunneling will continue in SoMa and Union Square. No Central Subway construction is planned to occur in Chinatown or North Beach. Descriptions of construction impacts in each neighborhood are available here or at the [...]
At the site where tunneling will begin, crews have started to build a floor known as a mud slab on the bottom of the excavation. During the next 10 days, construction to prepare for tunneling will continue in SoMa and Union Square. No Central Subway construction is planned to occur in Chinatown or North Beach. [...]
At Union Square, the contractor is continuing to construct below-ground walls in preparation for tunneling. During the next 10 days, construction to prepare for tunneling will continue in SoMa and Union Square. No Central Subway construction is planned to occur in Chinatown or North Beach. Descriptions of construction impacts in each neighborhood are available here [...]
