19 October 2012 ~ 0 Comments

Construction Update: Tunnel prep work progressing, full closure of 4th Street under I-80 overpass starting soon

This construction site on Stockton Street recently hosted an event to celebrate approval of major federal funding for the Central Subway. Tunnel pre-construction remains underway at four construction sites along the Central Subway Project alignment, including the site shown above, which last week hosted a ceremony to celebrate approval of federal funding to extend the […]

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07 September 2012 ~ 0 Comments

Construction Update: New traffic configurations in SoMa, North Beach as tunnel preparation progresses

This block of Columbus Avenue in North Beach is temporarily restored for traffic at the end of each work day. With autumn just around the corner, tunnel pre-construction continues to move forward in SoMa, Union Square and North Beach. As tunneling contractor Barnard Impregilo Healy JV completes work along the alignment, new traffic configurations are […]

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30 August 2012 ~ 0 Comments

Check it out: Our summer 2012 project newsletter

Construction is progressing at the site where tunneling will begin next year. Download our summer 2012 newsletter to learn more. Hot off the presses: It’s the summer 2012 edition of the Central Subway newsletter. Download it in English or Chinese to learn about the latest project news and to gain insight into construction progress, the public art program and community outreach […]

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17 August 2012 ~ 0 Comments

Construction Update: Tunnel preparation underway at four sites, Union Square utility relocation substantially complete

Tunnel pre-construction work is now underway on Ellis Street. The tall machine shown here on the right is used to perform ground stabilization work known as jet grouting. Tunnel pre-construction has continued to ramp up in recent weeks as tunneling contractor Barnard Impregilo Healy mobilized at two new sites along the project alignment: Around Union […]

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06 August 2012 ~ 6 Comments

Utility relocation starting in North Beach on August 13

Central Subway construction will take place on this block of Columbus Avenue near Washington Square Park. Construction associated with the Central Subway tunnel will begin August 13 in North Beach. The work involves relocating utility lines on a half-block section of Columbus Avenue between Union and Powell streets. The Central Subway tunnel is planned to […]

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27 July 2012 ~ 0 Comments

Construction Update: Tunnel contract work starts next week in Union Square area

Construction of a major excavation known as a launch box is underway on 4th Street between Bryant and Harrison streets. At nearly 500 feet long, 50 feet wide and up to 40 feet deep, the launch box will take up most of the block. In the next three weeks, work to prepare for tunneling will […]

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15 June 2012 ~ 8 Comments

Construction Update: Launch box and headwall construction proceeding in SoMa, road restoration progressing in Union Square

Construction at the site of the tunnel launch box, shown here, ramped up this week.  Construction to prepare for the Central Subway tunnel ramped up this week, and the new sidewalks on the west side of Stockton Street are almost completely restored. Here’s what to expect in the next three weeks as tunnel preparation continues and the Union […]

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07 June 2012 ~ 1 Comment

Preparing for the Central Subway Tunnel: Major Work Commencing Next Week

At the site of the tunnel launch box, crews are constructing shallow, below-ground walls to prepare for the major upcoming excavation. Next year, a pair of tunnel boring machines (TBMs) will begin excavating the Central Subway tunnel, building the backbone of Muni’s extension of the T Third Line through vibrant and bustling SoMa, downtown, Union […]

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06 June 2012 ~ 1 Comment

New sidewalks on Stockton Street as utility work nears completion

Since breaking ground in January 2011, contractor Synergy Project Management has finished relocating a variety of utility lines around Union Square to prepare for construction of the Union Square/Market Street Station. Now, with much of this work complete, sidewalks are being restored and reopened for pedestrians. Check out these pictures of the beautiful new sidewalks […]

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25 May 2012 ~ 1 Comment

Construction Update: Road and sidewalk restoration to commence near Union Square, utility relocation starting in SoMa

These walls, called guide walls, are being constructed at 4th Street beneath the I-80 overpass to prepare to excavate the site where the Central Subway tunnel will begin. In the next three weeks, road and sidewalk restoration are planned to begin along Stockton Street, and work associated with the tunnel contract is anticipated to commence […]

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