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SFMTA’s Central Subway will connect San Francisco’s southeast neighborhoods to downtown and Chinatown. Whether you’re a concerned citizen, business owner, Muni customer, or just stumbled onto our blog, we welcome your questions and encourage you to connect with us. Follow us for the latest Central Subway news and information.

22 May 2015 ~ 0 Comments

Project Advancements | May 23 – June 1

Workers continue to excavate and upgrade a sewer on 4th Street    between Brannan and Bluxome streets.

Workers continue to excavate and upgrade a sewer on 4th Street between Brannan and Bluxome streets.

This post contains brief updates about recent construction activities and a look-ahead for what to expect in Southern SoMa, Northern SoMa, Union Square and Chinatown over the next two weeks. For more detailed information, click here or on the links below. You can also find construction, traffic detour and Muni impact information on our project Google Map.

Construction schedules may change due to unforeseen conditions. We encourage the public to follow traffic and pedestrian notifications posted at the work sites.

Southern SoMa (Bryant to King): Utility work continues along 4th Street from Bryant to King streets.

  • Muni manhole installations on Freelon Street at 4th Street and on 4th Street between Bryant and Welsh streets

Northern SoMa (Market to Harrison): Excavation and construction of the station roof deck along 4th Street between Howard and Folsom streets is underway.

Union Square: Excavation of the station, relocation and supporting of utilities on Stockton Street between Ellis and Post streets are ongoing.

Chinatown: Excavation of the site and installation of the roof deck are in progress.

  • On Stockton Street between Washington and Jackson streets, PG&E reconstructing underground utilities with work hours of Monday to Friday, 9 a.m. to 3 p.m. and Saturday, 7 a.m. to 6 p.m.
  • Installation of a dewatering well scheduled to start the week of May 25 on Washington Street between Stockton Street and Ross Alley with work hours of Monday to Friday, 7 a.m. to 5 p.m.

We thank the businesses, residents, shoppers, and commuters of San Francisco for their continued engagement with this significant investment in the extension of our public transportation system. When opened in 2019, the Central Subway will provide a much-needed connection between major employment, retail, cultural and residential areas of the city.

20 May 2015 ~ 0 Comments

Media Tours Central Subway Tunnels

San Francisco Mayor Edwin M. Lee congratulates Central Subway Project Director John Funghi on completion of Tunnel Contract 1252.  This contract consists of the 1.7 mile long twin tunnels connecting South of Market through Union Square and Chinatown.   Also included in the contract (pictured here) is the tunnel portal located on 4th Street between Harrison and Bryant.

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The twin tunnels are made up of precast concrete rings comprised of six segments, which are bolted together underground.  Next steps for the Project include installation of track and systems to get revenue service ready by 2019.

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Local and network media participated in a news conference earlier this week to see the completed tunnels firsthand.

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Read here for more about the event.

15 May 2015 ~ 0 Comments

Project Advancements | May 15 – May 25

Workers installed rebar and concrete will soon be poured for the future Chinatown Station.

Workers installed rebar and concrete will soon be poured for the future Chinatown Station.

This post contains brief updates about recent construction activities and a look-ahead for what to expect in Southern SoMa, Northern SoMa, Union Square and Chinatown over the next two weeks. For more detailed information, click here or on the links below. You can also find construction, traffic detour and Muni impact information on our project Google Map.

Construction schedules may change due to unforeseen conditions. We encourage the public to follow traffic and pedestrian notifications posted at the work sites.

Southern SoMa (Bryant to King): Utility work continues along 4th Street from Bryant to King streets.

  • Muni manhole installations between 4th and 5th streets on Freelon Street and on 4th Street between Bryant and Welsh streets
    • On Monday, May 18, between 9 a.m. and 2 p.m., at intersection of 4th and Bryant streets, traffic control officers will direct traffic during street light work

Northern SoMa (Market to Harrison): Excavation and construction of the station roof deck along 4th Street between Howard and Folsom streets is underway.

  • Roof installation work on the east side of 4th Street between Howard and Folsom streets is ongoing
    • One traffic lane is available on 4th Street

Union Square: Excavation of the station, relocation and supporting of utilities on Stockton Street between Ellis and Post streets are ongoing.

  • Geary Boulevard at Stockton Street may be narrowed to one traffic lane from May 19 to May 21 during night work hours of 9 p.m. to 5 a.m.

Chinatown: Excavation of the site and installation of the roof deck are in progress.

  • On Stockton Street between Washington and Jackson streets, PG&E duct bank installation with work hours of Monday to Friday, 9 a.m. to 3 p.m.
  • Dewatering wells may start the week of May 18 on Washington Street at Stockton Street with work hours of Monday to Friday, 7 a.m. to 5 p.m.

We thank the businesses, residents, shoppers, and commuters of San Francisco for their continued engagement with this significant investment in the extension of our public transportation system. When opened in 2019, the Central Subway will provide a much-needed connection between major employment, retail, cultural and residential areas of the city.

14 May 2015 ~ 0 Comments

Featured Photos – May 14

Roof work on the western side of the Yerba Buena/Moscone Station is now complete.  Construction has switched to the eastern side as the crew prepares the site for excavation.

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A single lane of traffic remains open to vehicles between Howard and Folsom streets.

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Excavation of the entrance to the subway station entrance has begun on 4th Street between Clementina Alley and Folsom Street.

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Want to see more photos of project construction?  Check out our Flickr, updated weekly!

11 May 2015 ~ 1 Comment

Construction Moves Forward

Our latest video highlights the ongoing construction for the extension of the T Third Line during the first portion of 2015.

The excavation of the three subway stations: Chinatown, Union Square/Market Street, and Yerba Buena/Moscone continues on both Stockton and 4th Street. Along with the excavation, the stations’ roof decks are being installed.

The foundation work for the future 4th and Brannan Station is complete and installation and relocation of utilities continues.

Our tunneling contract has finished up. In North Beach, the retrieval shaft site has been covered over. The work on the portal structure has been completed and all lanes have reopened on 4th Street between Harrison and Bryant streets.

For additional project videos, check out our YouTube Channel.

08 May 2015 ~ 0 Comments

Project Advancements | May 9 – May 18

Roof deck beams are installed at Ellis and Stockton streets for the future Union Square/Market Street Station.

Roof beams are installed at Ellis and Stockton streets for the future Union Square/Market Street Station.

This post contains brief updates about recent construction activities and a look-ahead for what to expect in Southern SoMa, Northern SoMa, Union Square and Chinatown over the next two weeks. For more detailed information, click here or on the links below. You can also find construction, traffic detour and Muni impact information on our project Google Map.

Construction schedules may change due to unforeseen conditions. We encourage the public to follow traffic and pedestrian notifications posted at the work sites.

Southern SoMa (Harrison to King): Utility work continues along 4th Street from Bryant to King streets.

  • Muni manhole installations between 4th and 5th streets on Brannan and Bluxome streets
  • Muni duct bank installation on 4th Street between Welsh and Freelon streets
    • Work hours of Monday to Friday, 7 a.m. to 4 p.m.
    • Parking will be limited in work area

Northern SoMa (Market to Harrison): Excavation and construction of the station roof deck along 4th Street between Howard and Folsom streets is underway.

  • Roof installation work is anticipated to transition from the west to the east side of 4th Street between Howard and Folsom streets
    • One traffic lane will be available on the west side of 4th Street
    • Night work expected for traffic reconfiguration

Union Square: Excavation of the station, relocation and supporting of utilities on Stockton Street between Ellis and Post streets are ongoing.

Chinatown: Excavation of the site and installation of the roof deck are in progress.

  • On Stockton Street
    • Between Washington and Jackson streets
      • Bus bulb demolition and street restoration with work hours of Monday to Friday, 7 a.m. to 5 p.m.
      • Water line installation with work hours of Monday to Friday, 9 a.m. to 3 p.m.
    • Between Sacramento and Washington streets
      • Instrumentation installation with night work hours of Monday to Friday, 9 p.m. to 5 a.m.
        • Muni Impact: During night work hours of Monday, May 11 to Friday, May 15 between the hours of 9 p.m. to 5 a.m., a bus stop for northbound 30 Stockton, 45 Union/Stockton and 91 Owl on the mid-block of Stockton Street between Sacramento and Clay streets will be relocated to the north side of Clay Street on Stockton Street

We thank the businesses, residents, shoppers, and commuters of San Francisco for their continued engagement with this significant investment in the extension of our public transportation system. When opened in 2019, the Central Subway will provide a much-needed connection between major employment, retail, cultural and residential areas of the city.

07 May 2015 ~ 0 Comments

Throwback Thursday – May 7, 2015

Close to two years ago to date, the Central Subway project welcomed Tunnel Boring Machines (TBMs) Mom Chung and Big Alma to begin their 120 foot per-day dig to construct the subway tunnel extension.

Their trek was commemorated in different ways:

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San Francisco Mayor Ed Lee toured the beginnings of the tunneling project.

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The Mayor signed Tunnel Boring Machine Mom Chung at the onset of her 1.7 mile journey across San Francisco.

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Last year, the two TBMs completed their journey under the streets of San Francisco.  Staff poses at the completed end point known as the retrieval shaft.

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01 May 2015 ~ 0 Comments

Project Advancements | May 2 – May 11

Portions of the Union Square Garage are being reconfigured to accommodate the future Union Square/Market Street Station.

Portions of the Union Square Garage are being reconfigured to accommodate the future Union Square/Market Street Station.

This post contains brief updates about recent construction activities and a look-ahead for what to expect in Southern SoMa, Northern SoMa, Union Square and Chinatown over the next two weeks. For more detailed information, click here or on the links below. You can also find construction, traffic detour and Muni impact information on our project Google Map.

Construction schedules may change due to unforeseen conditions. We encourage the public to follow traffic and pedestrian notifications posted at the work sites.

Southern SoMa (Harrison to King): Utility work continues along 4th Street from Bryant to King streets.

  • Muni manhole installations between 4th and 5th streets on Brannan Street and on Bluxome Street
  • Muni duct bank installation on 4th Street between Freelon and Brannan streets
    • Work hours of Monday to Friday, 7 a.m. to 4 p.m.
    • Parking will be limited in work area

Northern SoMa (Market to Harrison): Excavation and construction of the station roof deck along 4th Street between Howard and Folsom streets is underway.

  • During the week of May 4, roof installation work may transition from the west to the east side of 4th Street
    • 2 traffic lanes will open on the west side of 4th Street
    • Night work expected for traffic reconfiguration

Union Square: Excavation of the station, relocation and supporting of utilities on Stockton Street between Ellis and Post streets are ongoing.

Chinatown: Excavation of the site and installation of the roof deck are in progress.

  • On Stockton Street
    • Between Washington and Jackson streets
      • Bus bulb demolition and street restoration with work hours of Monday to Friday, 7 a.m. to 5 p.m.
      • Water line installation with work hours of Monday to Friday, 9 a.m. to 3 p.m.
    • Between Sacramento and Washington streets
      • Instrumentation installation with night work hours of Monday to Friday, 9 p.m. to 5 a.m.
        • Muni Impact: During night work hours of Monday to Friday, 9 p.m. to 5 a.m., a bus stop for southbound 8 Bayshore, 8AX/8BX Bayshore Express, 30 Stockton, 45 Union/Stockton and 91 Owl on the mid-block of Stockton Street between Sacramento and Clay streets will be relocated to the north side of Sacramento Street on Stockton Street

We thank the businesses, residents, shoppers, and commuters of San Francisco for their continued engagement with this significant investment in the extension of our public transportation system. When opened in 2019, the Central Subway will provide a much-needed connection between major employment, retail, cultural and residential areas of the city.

30 April 2015 ~ 0 Comments

Featured Photos – April 30

The future location of the surface station at 4th & Brannan streets.

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South of Brannan, workers are removing the top of an old sewer and upgrading it.

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Rebar is being installed prior to pouring concrete to support the weight of trains passing overhead when service begins in 2019.

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24 April 2015 ~ 0 Comments

Project Advancements | April 25 – May 4

Workers continue with roof installation for the future Yerba Buena/Moscone Station on Clementina Street at 4th Street.

Workers continue with roof installation for the future Yerba Buena/Moscone Station on Clementina Street at 4th Street.

This post contains brief updates about recent construction activities and a look-ahead for what to expect in Southern SoMa, Northern SoMa, Union Square and Chinatown over the next two weeks. For more detailed information, click here or on the links below. You can also find construction, traffic detour, and Muni impact information on our project Google Map.

Construction schedules may change due to unforeseen conditions. We encourage the public to follow traffic and pedestrian notifications posted at the work sites.

Southern SoMa (Harrison to King): Utility work continues along 4th Street from Bryant to King streets.

  • Water line and duct bank installation on 4th Street between Bryant and Brannan streets
    • Work hours of Monday to Friday, 7 a.m. to 4 p.m.
  • Portal construction completed
    • All traffic lanes have reopened
    • The contractor is removing equipment from the work site until mid-May

Northern SoMa (Market to Harrison): Excavation and construction of the station roof along 4th Street between Howard and Folsom streets is underway.

  • Utility restoration at 4th and Jessie streets is complete
    • All traffic lanes on 4th Street between Market and Mission streets have reopened

Union Square: Excavation of the station, relocation and supporting of utilities on Stockton Street between Ellis and Post streets are ongoing.

  • O’Farrell Street will be narrowed to one lane at Stockton Street until late July

Chinatown: Excavation of the site and installation of the station roof are in progress.

  • On Stockton Street between Clay and Washington
    • Potholing with night work hours anticipated April 27 and 28 from 7 p.m. to 5 a.m.
  • On Stockton Street between Washington and Jackson streets
    • Water line installation with work hours of Monday to Friday, 9 a.m. to 3 p.m.
      • Parking will be limited during work hours
  • On Stockton Street between Sacramento and Clay streets
    • Instrumentation installation with night work hours of Monday to Friday, 9 p.m. to 5 a.m.
      • Parking will be limited during work hours
    • Muni Impact: During night work hours of Monday to Friday, 9 p.m. to 5 a.m.
      • A bus stop for southbound 8X/8AX/8BX Bayshore Express, 30 Stockton, 45 Union/Stockton and 91 Owl on the mid-block of Stockton Street between Sacramento and Clay streets will be relocated to the north side of Sacramento Street on Stockton Street

We thank the businesses, residents, shoppers, and commuters of San Francisco for their continued engagement with this significant investment in the extension of our public transportation system. When opened in 2019, the Central Subway will provide a much-needed connection between major employment, retail, cultural and residential areas of the city.