Central Subway Project Update for February 2020
Electronic display boxes are being installed at the north end of Yerba Buena/Moscone Station's platform.
This notice provides a general project update and look-ahead which includes information about work activities, traffic, and transportation impacts taking place over the next few weeks along the project alignment.
For more project information, visit SFMTA.com/CentralSubway
Conduits for electrical, communications, and signaling systems, are being installed inside the northbound tunnel.
Surface Work, Systems, and 4th/Brannan Station
Before entering into the surface-to-tunnel portal just north of 4th and Bryant, a section of the new T Third Line extension will travel on the surface of 4th between King and Bryant. To increase access, there will be one surface-level station platform added just north of the 4th and Brannan intersection. Tactile paving tiles, public art, and an access ramp are currently being installed and built there.
A public art centerpiece was installed at the 4th and Brannan surface station platform. The piece is a kinetic sculpture entitled Microcosmic, by Bay Area artist Moto Ohtake. This installation is one of 10 major art pieces that are a part of the Central Subway Project.
Just to the south of the surface platform, the reinforced concrete rail bed and dual trackway were also installed across the 4th and Brannan intersection, closing one of the last gaps in rail installation for the project.
Inside the twin subway tunnels, permanent lighting, electrical systems, signaling, and tunnel walkway elements are being installed.
4th and King Weekend Work
Starting Friday, February 28 at 7 pm, crews will be installing the train case foundation and systems equipment at the 4th and King intersection. This work should be concluded by 9 amon Saturday the 29th.
Pieces of steel framing are fabriated and installed piece by piece at the future fare gate entrance area.
Yerba Buena/Moscone Station
The first subway station north of the tunnel portal will be Yerba Buena/Mosone Station, with the entrance plaza located at 4th and Clementina (near Folsom Street). Street-level elements such as elevator shafts and steel framing are being constructed. Crews are also building out the station interior, installing permanent lighting, fire suppression systems, terrazzo floors, concourse-to-platform elevators, wall panels, conduits, and utilities.
Emergency exit stairs at the north end of the station platform are being painted bright orange to aide in giving directions during an emergency.
Union Square/Market Street Station
The largest of the three new subway stations will be Union Square/Market Street. This station will link directly to Powell Station via an underground concourse connection, and will feature two station entrances: One at the southeast corner of Union Square, and a refurbished entrance at Stockton and Ellis. Crews have continued to build out the station interior, constructing partition walls on intermediary floors, adding utilities, and installing finishing elements such as wall and ceiling panels, public art, and laying out the terrazzo floor both on the concourse and station platform.
Recently, the boarding island and bulb-out for buses was reopened just north of Geary for the 30/45/8 Muni buses traveling south, replacing the temporary stop south of the intersection.
Perforated panels are installed as part of sound reduction and interior design elements inside the platform cavern.
Chinatown - Rose Pak Station
The deepest and most impressively complex of the three subway stations to excavate and construct is Chinatown - Rose Pak Station. The future station entrance will be located at the southwest corner of Stockton and Washington, and will be topped by a rooftop plaza. Interior walls, multiple stairways, waterproofing for exterior walls, and station utilities are all currently being added. Work on the rooftop plaza that will be open to the public is also underway.
Potential Vehicular/Pedestrian Impacts
The west sidewalk and one southbound lane of Stockton adjacent to the work site south of Washington may experience brief closures from time to time due to concrete pours. Detours will be indicated when in effect. A temporary stop has been added for southbound Muni routes 8, 30, 45 and 91 on Stockton at Washington. This stop will eventually be located in directly in front of the station to make transfers easy.