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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.

21 November 2014 ~ 0 Comments

Project Advancements | November 22 – December 8, 2014

This post covers the next two weeks. Our next update will be on Friday, Dec. 5. Happy Thanksgiving from the Central Subway team!

The contractor opened the roadway decks to pour concrete for a gateway structure that will allow the T Third Line an entry/exit onto 4th Street.

The contractor opened the roadway decks to pour concrete for a gateway structure that will allow the T Third Line an entry/exit onto 4th Street.

During the next 17 days, Central Subway work continues at sites in SoMa, Union Square, Chinatown and North Beach. This post contains brief updates about recent construction activities and a look-ahead for what to expect in each neighborhood. 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): Construction crews are relocating and installing new utilities along 4th Street from Harrison to King streets.

  • At the intersection of 4th and Harrison streets, work on a high pressure water line continues.
    • Two traffic lanes will remain open Monday to Friday, 7 a.m. to 3 p.m.
      • On 4th Street between Harrison and Bryant streets, one traffic lane will be available until Nov. 26.
    • Access to Interstate 80 freeway may be limited on some evenings from 8 p.m. to 5 a.m. and during weekends.
  • On 4th Street between Harrison and Bryant streets, construction of the portal continues.
    • Tentative closure of 4th Street between Harrison and Bryant streets on Nov. 29 between midnight and 6 a.m.
    • Closure of 4th Street between Harrison and Bryant streets starting Dec.1 through end of February 2015.

Northern SoMa (Market to Harrison): Construction crews are building walls and replacing a water line along 4th Street between Howard and Folsom streets.

Union Square: Construction crews are converting portions of Stockton Street between Ellis Street and Geary Boulevard into a holiday plaza called “Winter Walk SF.”

Chinatown: Construction crews are building station walls and installing new utilities on Stockton Street between Sacramento and Washington streets.

North Beach: Construction crews are restoring the retrieval shaft site.

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 November 2014 ~ 0 Comments

Project Advancements | November 15 – November 24, 2014

A welder fuses two metal plates together at the end of the day.

A welder fuses two metal plates together at the end of the day.

During the next 10 days, Central Subway work continues at sites in SoMa, Union Square, Chinatown and North Beach. This post contains brief updates about recent construction activities and a look-ahead for what to expect in each neighborhood. 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): Construction crews are relocating and installing new utilities along 4th Street from Harrison to King streets.

  • At the intersection of 4th and Harrison streets, work on a high pressure water line continues.
    • Two traffic lanes will remain open Monday to Friday, 7 a.m. to 3 p.m.
      • On 4th Street between Harrison and Bryant streets, one traffic lane will be available starting Nov. 20 through Nov. 26.
    • Access to Interstate 80 freeway may be limited on some evenings from 8 p.m. to 5 a.m. and during weekends.
  • On 4th Street between Bryant and Welsh streets, AT&T vault installation continues.
    • Muni service impact: The bus stop on Bryant Street at 4th Street has been relocated to the mid-block of Bryant Street between 4th and 5th streets until Nov. 25.

Northern SoMa (Market to Harrison)Construction crews are building walls and replacing a water line along 4th Street between Howard and Folsom streets.

  • On 4th Street between Folsom and Harrison streets, sewer line replacement continues.
    • Two traffic lanes will remain open Monday to Friday, 7 a.m. to 4 p.m.
    • Parking in this area may be limited.

Union SquareConstruction crews are excavating the site, building station walls and relocating utilities on Stockton Street between Ellis Street and Maiden Lane. Work on restoring portions of this area for the holidays continues.

  • For a look at the restoration work on Stockton Street, click here.

Chinatown: Construction crews are building station walls and installing new utilities on Stockton Street between Sacramento and Washington streets.

  • On Washington Street between Stockton and Spofford streets, replacement of a high pressure water line and installation of a fire hydrant continues.
    • Work hours are Monday to Friday, 7 a.m. to 5 p.m.
    • Parking may be impacted in the vicinity of the construction area.

North BeachConstruction crews continue to restore the retrieval shaft site.

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.

 

12 November 2014 ~ 1 Comment

Portal Structure Moves Forward

Under 4th Street, between Harrison and Bryant streets, work continues at the launch box site. This site is where tunnel boring machines, Mom Chung and Big Alma, were launched last year. The launch box is now being transformed into a portal (gateway structure).

This rendering shows what 4th Street may look like after the portal is constructed between Harrison and Bryant streets.

This rendering shows what the portal may look like upon completion.

The portal will bring the light rail vehicles to the surface and vice-versa, thereby connecting the north and south quadrants of the city. The construction of the portal includes building walls, a floor/ramp and back filling the area. The walls and floor are being strengthened by inserting metal re-bar into the structure.

Forms for the floor are being built and rebar inserted to reinforce the concrete. The beams across the top support 4th Street which sits above this area. The entrance/exit for the north and southbound tunnels can be seen in the background.

The floor of the portal is gradually being built into a ramp.

A worker walks back towards the tunnels.

The portal walls are being reinforced with re-bar.

The crew installs metal bracing to support the wall.

 Metal bracing is being installed to support the walls.

Visible surface construction activity for the portal will be seen in December. The portal is estimated to be completed by the 2nd quarter of 2015.

07 November 2014 ~ 0 Comments

Project Advancements | November 8 – November 17, 2014

Workers install forms to house the future concrete walls of the tunnel portal. The portal is the entrance/exit for the extension of the T Third Line being constructed underground on 4th Street between Harrison and Bryant streets.

Workers are installing concrete walls for the future tunnel portal. The portal will be used as an entrance/exit for the extension of the T Third Line being constructed underground on 4th Street between Harrison and Bryant streets.

During the next 10 days, Central Subway work continues at sites in SoMa, Union Square, Chinatown and North Beach. This post contains brief updates about recent construction activities and a look-ahead for what to expect in each neighborhood. 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): Construction crews are relocating and installing new utilities along 4th Street from Harrison to King streets.

  • At the intersection of 4th and Harrison streets, work on a high pressure water line continues.
    • Two traffic lanes will remain open Monday to Friday, 7 a.m. to 3 p.m.
      • On 4th Street between Harrison and Bryant streets, one traffic lane will be available starting Nov. 20 through Nov. 26.
    • Access to Interstate 80 freeway may be limited on some evenings from 8 p.m. to 5 a.m. and during weekends.
  • On 4th Street between Bryant and Welsh streets, AT&T vault installation continues.
    • Muni service impact: Starting Nov. 12 through Nov. 25 the bus stop on Bryant Street at 4th Street is anticipated to be relocated to the mid-block of Bryant Street between 4th and 5th streets.

Northern SoMa (Market to Harrison): Construction crews are building walls and replacing a water line along 4th Street between Howard and Folsom streets.

  • On 4th Street between Folsom and Harrison streets, sewer line replacement continues.
    • Two traffic lanes will remain open Monday to Friday, 7 a.m. to 4 p.m.
    • Parking in this area may be limited.

Union Square: Construction crews are excavating the site, building station walls and relocating utilities on Stockton Street between Ellis Street and Maiden Lane. Preparations have started to restore portions of this area for the holidays.

Chinatown: Construction crews are building station walls and installing new utilities on Stockton Street between Sacramento and Washington streets.

  • On Washington Street between Stockton and Spofford streets, replacement of a high pressure water line and installation of a fire hydrant continues.
    • Work hours are Monday to Friday, 7 a.m. to 5 p.m.
    • Parking may be impacted in the vicinity of the construction area.

North Beach: Construction crews continue to restore the retrieval shaft site.

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.

 

05 November 2014 ~ 0 Comments

Featured Photo: Ambassadors

The Central Subway Project started deploying ambassadors to assist pedestrians. This is part of a pilot program to help keep Sunday foot traffic moving in the heart of the downtown area.

An ambassador helps people cross at the intersection of Stockton and O'Farrell streets.

An ambassador assists people at the intersection of
Stockton and O’Farrell streets.

An ambassador helps pedestrians.

An ambassador gives directional help to pedestrians.

For updates on project advancements, sign up for our weekly construction update here or follow us on FacebookTwitterFlickr, or YouTube.

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.

31 October 2014 ~ 1 Comment

Project Advancements | November 1 – November 10, 2014

Happy Halloween!
Happy Halloween!

During the next 10 days, Central Subway work continues at sites in SoMa, Union Square, Chinatown and North Beach. This post contains brief updates about recent construction activities and a look-ahead for what to expect in each neighborhood. 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 all traffic and pedestrian notifications posted at the work sites.

Southern SoMa (Harrison to King): Construction crews are relocating and installing new utilities along 4th Street from Harrison to King streets.

  • At the intersection of 4th and King streets, utility potholing is scheduled for Nov. 3 and 4.
    • Night work hours between 7 p.m. and 5 a.m.
  • At the intersection of 4th and Harrison streets, work on a high pressure water line continues.
    • Two traffic lanes will remain open Monday to Friday, 7 a.m. to 3 p.m.
    • Access to Interstate 80 freeway may be limited on some evenings between 8 p.m. and 5 a.m.
  • On 4th Street between Brannan and Freelon streets, potholing continues.
    • Two traffic lanes will remain open Monday to Friday, 7 a.m. to 3:30 p.m.
  • Along Townsend Street between 4th and 5th streets, street light conduit installation continues.

Northern SoMa (Market to Harrison)Construction crews are building walls and replacing a water line along 4th Street between Howard and Folsom streets.

  • Tentative: On 4th Street between Folsom and Harrison streets, sewer line replacement is anticipated to start on Nov. 4.

Union SquareConstruction crews are excavating the site, building station walls and relocating utilities on Stockton Street between Ellis Street and Maiden Lane.

  • AT&T night work will begin on Nov. 3 through Nov. 5 from 1 to 5 a.m.
    • Street closure of O’Farrell Street between Powell and Stockton streets.
    • Local deliveries and construction equipment allowed during the closure.

Chinatown: Construction crews are building station walls and installing new utilities on Stockton Street between Sacramento and Washington streets.

North BeachConstruction crews continue to restore the retrieval shaft site.

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.

 

24 October 2014 ~ 0 Comments

Project Advancements | October 24 – November 3, 2014

Station walls are being constructed at the future Chinatown Station. When opened in 2019, this station will increase transportation options.

Station walls are being constructed at 933-939 Stockton Street for the future Chinatown Station.

During the next 10 days, Central Subway work continues at sites in SoMa, Union Square, Chinatown and North Beach. This post contains brief updates about recent construction activities and a look-ahead for what to expect in each neighborhood. 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 all traffic and pedestrian notifications posted at the work sites.

Southern SoMa (Harrison to King): Construction crews are relocating and installing new utilities along 4th Street from Harrison to King streets.

  • Tentative: At the intersection of 4th and King streets, potholing work on Nov. 3 and 4.
    • Night work between 7 p.m. and 5 a.m.
  • At the intersection of 4th and Harrison streets, work on a high pressure water line continues.
    • Two traffic lanes will remain open Monday to Friday, 7 a.m. to 3 p.m.
    • Access to Interstate 80 freeway may be limited on some evenings between 8 p.m. and 5 a.m.
  • On 4th Street between Bryant and Brannan streets, potholing and installation of a sewer line continues.Two traffic lanes will remain open Monday to Friday, 7 a.m. to 3:30 p.m.

Northern SoMa (Market to Harrison): Construction crews are building walls and replacing a water line along 4th Street between Howard and Folsom streets.

  • Tentative: Along 4th Street between Folsom and Harrison streets, sewer line replacement to start by the end of October.

Union Square: Construction crews are excavating the site, building station walls and relocating utilities on Stockton Street between Ellis Street and Maiden Lane.

Chinatown: Construction crews are building station walls and installing new utilities on Stockton Street between Sacramento and Washington streets.

North Beach: Construction crews continue to restore the retrieval shaft site.

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.

17 October 2014 ~ 0 Comments

Project Advancements | October 18 – October 27, 2014

Two workers attempt to unclog a hydromill at the future Chinatown Station location. The future Chinatown Plaza that will sit on top of this Central Subway station will provide much needed open space for the community.

Two workers clean a hydromill at the future Chinatown Station location. When opened in 2019 this station will increase transportation options.

During the next 10 days, Central Subway work continues at sites in SoMa, Union Square, Chinatown and North Beach. This post contains brief updates about recent construction activities and a look-ahead for what to expect in each neighborhood. 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.

Check out the new project construction video on YouTube posted here.

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

Southern SoMa (Harrison to King): Construction crews are relocating and installing new utilities along 4th Street from Harrison to King streets.

  • At the intersection of 4th and Harrison streets, work on utilities is scheduled to start Monday, Oct. 20.
    • Two traffic lanes will remain open Monday to Friday, 7 a.m. to 5 p.m.
    • Access to Interstate 80 freeway may be limited on some evenings between 8 p.m. and 5 a.m.
  • On 4th Street between Bryant and Brannan streets, installation of a sewer line continues.Two traffic lanes will remain open Monday to Friday, 7 a.m. to 3:30 p.m.

Northern SoMa (Market to Harrison)Construction crews are building walls and replacing a water line along 4th Street between Howard and Folsom streets.

  • Tentative: Along 4th Street between Folsom and Harrison streets, sewer line replacement to start Oct. 28.

Union SquareConstruction crews are excavating the site, building station walls and relocating utilities on Stockton Street between Ellis Street and Maiden Lane.

Chinatown: Construction crews are building station walls and installing new utilities on Stockton Street between Sacramento and Washington streets.

North BeachConstruction crews continue to restore the retrieval shaft site.

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.

10 October 2014 ~ 0 Comments

Project Advancements | October 11 – October 20, 2014

At the future Union Square/Market Street Station, workers continue constructing the roof deck. Access to the current Muni and Bart stations will be available at this location.

At the future Union Square/Market Street Station, workers continue constructing the roof deck. Access to the current Muni and Bart stations will be available at this location.

During the next 10 days, Central Subway work continues at sites in SoMa, Union Square, Chinatown and North Beach. This post contains brief updates about recent construction activities and a look-ahead for what to expect in each neighborhood. 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.

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

Southern SoMa (Harrison to King): Construction crews are relocating and installing new utilities along 4th Street from Bryant to King streets.

  • On Monday, Oct. 13 from 8 p.m. to 4 a.m., 4th Street between Harrison and Bryant streets will be closed.
    • For more information, click here.
  • On 4th Street between Bryant and Brannan streets, installation of a sewer line continues.Two traffic lanes will remain open Monday to Friday, 7 a.m. to 3:30 p.m.
  • On Welsh Street and on Freelon Street at 4th Street, sewer manhole work to begin.
  • On Bryant Street between 5th and Zoe streets, installation of a sewer.
  • On 4th Street at Bluxome Street, installation of an AT&T vault.

Northern SoMa (Market to Harrison)Construction crews are building walls and replacing a water line along 4th Street from Howard to Folsom streets.

  • Tentative: Along 4th Street between Folsom and Harrison streets, sewer line replacement to start Oct. 15.

Union SquareConstruction crews are excavating the site, building station walls and relocating utilities on Stockton Street between Ellis Street and Maiden Lane.

Chinatown: Construction crews are building station walls and installing new utilities on Stockton Street between Sacramento and Washington streets.

North BeachConstruction crews continue to remove the remaining associated equipment and restore the site.

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.

 

03 October 2014 ~ 0 Comments

Project Advancements | October 4 – October 13, 2014

Workers at 1731-1741 Powell Street continue working on dismantling the tunnel boring machine (TBM) Mom Chung. The tunnels that were constructed by the TBMs are approximately 20 feet in diameter.

Workers at 1731-1741 Powell Street continue working on dismantling the tunnel boring machine (TBM) Mom Chung. The tunnels that were constructed by the TBMs are approximately 20 feet in diameter.

During the next 10 days, Central Subway work continues at sites in SoMa, Union Square, Chinatown and North Beach. This post contains brief updates about recent construction activities and a look-ahead for what to expect in each neighborhood. 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.

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

Southern SoMa (Harrison to King): Construction crews are relocating and installing new utilities along 4th Street from Bryant to King streets.

  • On 4th Street between Bryant and Brannan streets, sewer line installation to start Oct. 8.
    • Two traffic lanes will remain open Monday to Friday, 7 a.m. to 5 p.m.
  • On Welsh Street at 4th Street, sewer manhole work.
  • On Freelon Street at 4th Street, sewer manhole work.
  • On Bryant Street between 5th and Zoe streets, installation of a sewer.
  • On 4th Street at Bluxome Street, installation of an AT&T vault.

Northern SoMa (Market to Harrison)Construction crews are building walls and replacing a water line along 4th Street from Howard to Folsom streets.

  • Along 4th Street between Folsom and Harrison streets, sewer line replacement scheduled to start Oct. 8.
  • On 4th Street between Howard and Folsom streets, one traffic lane remains open.

Union SquareConstruction crews are excavating the site, building station walls and relocating utilities on Stockton Street between Ellis Street and Maiden Lane.

  • On Stockton Street at O’Farrell Street:
    • One traffic lane will remain open.
    • Sidewalk closure on the north side of O’Farrell Street scheduled overnight 10 p.m. to 6 a.m. through the end of October.
  • On Stockton Street at Geary Boulevard:
    • One traffic lane will remain open.
    • Crosswalk on the south side of Geary Boulevard is temporarily closed.
    • Muni service impact: Bus stop at Geary Boulevard and Stockton Street temporarily discontinued until mid-November. Board bus on Geary Boulevard at Powell Street.

Chinatown: Construction crews are building station walls and installing new utilities on Stockton Street between Sacramento and Washington streets.

North BeachConstruction crews continue to remove the remaining tunnel boring machine, associated equipment and restore the site.

  • Sewer cleaning on Columbus Avenue between Union and Filbert streets.

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.