Central Subway Construction Update – January 10, 2014

The Central Subway will extend the Muni Metro T Third Line underground through some of San Francisco's busiest and fastest growing neighborhoods. This significant improvement to public transit is scheduled to open in 2019. Thank you for your patience and interest as we build it.

The Central Subway will extend the Muni Metro T Third Line underground through some of San Francisco’s busiest and fastest growing neighborhoods. This significant improvement to public transit is scheduled to open in 2019. Thank you for your patience and interest as we build it.

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Construction Update

January 11-20, 2014

 

During the next 10 days, Central Subway work will continue at sites in SoMa, Union Square, Chinatown and North Beach. This section contains brief updates about what is happening in each neighborhood. For more detailed information, scroll down or click on the links below. We also post construction, traffic detour and Muni impact information on our project Google Map.

Southern SoMa (Harrison to King/Berry): We expect to begin potholing for utilities on 4th Street between Bryant and King the week of Jan. 20. At the tunnel launch box on 4th Street between Harrison and Bryant, tunneling continues with both TBMs.

Northern SoMa (Market to Harrison): We plan to begin restoring 4th Street between Folsom and Harrison during the next two weeks. Until then, the traffic pattern may change to allow for underground sewer surveys. At 4th and Folsom, work to prepare for the Yerba Buena/Moscone Station continues. Work may include demolishing the roadway within the construction zone to prepare to construct underground station walls.

Union Square: Stockton Street between O’Farrell and Geary is closed to vehicular traffic to allow for construction of the Union Square/Market Street Station. Stockton between Ellis and O’Farrell may close next week as crews continue to install decorative barricades around the construction zone.

Chinatown: Work to prepare for the Chinatown Station continues within the future station site and on the adjacent section of Washington Street. On Jackson Street adjacent to Stockton Street, the contractor may be performing underground borings during the day.

North Beach: Near the intersection of Columbus Avenue and Stockton Street, crews will be performing underground sewer work for approximately one month, starting next week. This work does not involve excavation. The southbound bus stop on Stockton Street at Columbus will be relocated to Stockton and Vallejo during work hours (Monday to Friday, 9 a.m. to 3 p.m.). See the North Beach section for more details. Work on Columbus Avenue at Union Street is currently on hold. We will provide additional details about this work before it recommences. Work will continue at 1455 Stockton and 1731-1741 Powell, within the property lines.

We appreciate your patience and support while we build this essential upgrade to San Francisco’s public transportation system.

The Central Subway Team

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At 1731-1741 Powell, we are constructing a retrieval shaft to remove two tunnel boring machines from the ground when tunneling is finished.

 

North Beach

 

Powell Street from Union to Columbus

 

On private property at 1731-1741 Powell Street, the contractor is building a walled excavation known as a retrieval shaft at the site where tunneling will end. The two tunnel boring machines will be removed from the ground here. We plan to complete work at this location in 2014.

 

On private property at 1455 Stockton Street, the contractor is constructing an underground shaft to perform ground improvements when the TBMs pass below Columbus Avenue.

 

Near the intersection of Columbus Avenue and Stockton Street, crews will be performing underground sewer work for approximately one month, starting next week. This work will take place on weekdays and will not involve digging in the street. The purpose is to strengthen the sewers in preparation for the TBMs passing below.

 

Planned construction (Pagoda):

 

  • Install pipes underground for ground improvements
  • Planned construction hours are Monday to Saturday, 6 a.m. to 8 p.m.

 

Traffic, transit and pedestrian impacts (Pagoda):

 

  • Several parking spaces may be closed in front of the property.
  • The sidewalk in front of the property may be closed. A temporary walkway will be in place around the construction zone when the sidewalk is closed.

 

Planned construction (1455 Stockton):

 

  • Install ground improvement components from within ground improvement shaft
  • Work hours are Monday-Friday, 7 a.m. to 5 p.m.

 

Traffic, transit and pedestrian impacts (1455 Stockton):

 

  • No impacts to traffic, transit or pedestrian walkways are anticipated
  • The parking lot at 1455 Stockton will remain closed

 

Planned construction (Stockton and Columbus):

 

  • Improve sewers via manholes on Columbus and Stockton, near the intersection of the two streets
  • Work hours are Monday-Friday, 9 a.m. to 3 p.m.

 

Traffic, transit and pedestrian impacts (1455 Stockton):

 

  • The southbound bus stop on Stockton south of Columbus will be relocated to Stockton and Vallejo during construction hours.
  • Parking will be impacted on Stockton just south of Columbus during construction hours.
  • No lanes will be closed, but traffic will be routed around work zones in the middle of the street.