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Construction Update | July 13-22

Construction Updates - Fri, 07/12/2013 - 16:32

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People pass by our Stockton Street construction site on a sunny day earlier this week.

During the next 10 days, construction to prepare for tunneling will continue in SoMa and Union Square. In North Beach, demolition of the Pagoda Palace is planned to begin. No Central Subway construction is planned in Chinatown.

For descriptions of construction impacts in each neighborhood, click here or on the links below. We also post construction, traffic detour and Muni impact information on our project Google Map.

Construction impacts are planned to change at these locations by July 22:

  • Southern SoMa (Harrison to King/Berry): Full closure of 4th Street between Harrison and Bryant will continue some evenings and weekends, including all day Saturday, July 13. Two lanes of traffic will remain open at all other times. Contact us at central.subway@sfmta.com if you have questions about the closure schedule. On Bryant Street at 5th Street, the left lane and several parking spaces will remain closed.
  • North Beach: Demolition of the Pagoda Palace Theater is scheduled to take approximately four weeks to complete. For more information about construction at this site, check out this fact sheet.

At these locations, current construction impacts are planned to continue until July 22:

  • Northern SoMa (Market to Harrison): Two lanes of traffic will remain closed on 4th Street between Howard and Folsom. On 4th Street between Market and Stevenson, the sidewalk and two traffic lanes will remain closed on the eastern side of the street.
  • Union Square: Stockton Street between Geary and Ellis will remain closed to vehicle traffic. Ellis Street between Stockton and Powell will remain closed to westbound traffic.
  • Chinatown: No construction planned

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

Categories: Construction Updates

Construction Details | Pagoda Palace Demolition

Featured News - Thu, 07/11/2013 - 12:20

pagoda

The Central Subway tunnel will end at this site in North Beach, now home to the old Pagoda Palace Theater.

Since last summer, the SFMTA has worked closely with the North Beach community and multiple city agencies to relocate the retrieval site of the Central Subway’s tunnel boring machines (TBMs) from its original site on Columbus Avenue. After a series of community meetings and based on feedback from the community, the TBMs will now be retrieved at 1731-1741 Powell Street, known as the Pagoda Palace.

The first phase of construction at this site is the demolition of the Pagoda Palace. We expect this activity to take approximately four weeks to complete, including mobilization and site clean-up.

The building will be demolished using specialized equipment called a nibbler and crusher. This equipment is like a scissor that cuts the building into small pieces of rubble. Working from the sidewalk and parking lane in front of the Pagoda Palace, the contractor will take down the facade of the building, starting with the tallest point. Once there is enough clearance, the contractor will move inside the property line and complete the demolition from within.

After demolishing the building, we will construct a retrieval shaft within the property lines at 1731-1741 Powell Street. The retrieval shaft is an excavation of about 45 ft. by 49 ft., with a depth of approximately 42 ft. We will provide additional details about retrieval shaft construction before it begins.

The SFMTA is working closely with local contractor MH Construction to minimize construction impacts as much as possible while demolition is underway. For more information, check out this fact sheet. Construction details are below.

Planned construction (all dates approximate):

  • Disconnect utilities within building (week of July 8)
  • Set up pedestrian detour (week of July 15)
  • Mobilize demolition equipment (week of July 15)
  • Demolish building (approx. July 15-26)
  • Remove demolished building pieces (week of July 29)
  • Grade the site (week of July 29)
  • Construction hours will be Monday to Friday, 7 a.m. to 3:30 p.m.
  • Demolition takes approximately two weeks to complete, with two additional weeks required to prepare the site, remove the building pieces and grade the lot.

Traffic, transit and pedestrian impacts:

  • Area of impact: Powell Street and Columbus Avenue between Filbert and Union streets
  • The sidewalk in front of 1731-1741 Powell Street will be impacted
  • The Muni 39 Coit may be temporarily rerouted, but no stops will be impacted (see fact sheet for details)
  • Parking restrictions will be in effect in front of the Pagoda Palace on Powell Street and Columbus Avenue
  • Powell Street between Union and Columbus will remain open to traffic, but the traffic lane may be narrowed
  • The contractor will maintain access to adjacent businesses and facilitate the flow of traffic during work hours
  • Dust will be monitored and controlled, and noise will be kept within required decibel levels (see fact sheet for details)

We will provide additional updates via email and on our blog as work proceeds. Should you have any questions, please contact North Beach liaison Andrea Baker at 415.351.8427.

Thank you for your patience and support.

Categories: News

Construction Details | Pagoda Palace Demolition

Construction Updates - Thu, 07/11/2013 - 12:20

pagoda

The Central Subway tunnel will end at this site in North Beach, now home to the old Pagoda Palace Theater.

Since last summer, the SFMTA has worked closely with the North Beach community and multiple city agencies to relocate the retrieval site of the Central Subway’s tunnel boring machines (TBMs) from its original site on Columbus Avenue. After a series of community meetings and based on feedback from the community, the TBMs will now be retrieved at 1731-1741 Powell Street, known as the Pagoda Palace.

The first phase of construction at this site is the demolition of the Pagoda Palace. We expect this activity to take approximately four weeks to complete, including mobilization and site clean-up.

The building will be demolished using specialized equipment called a nibbler and crusher. This equipment is like a scissor that cuts the building into small pieces of rubble. Working from the sidewalk and parking lane in front of the Pagoda Palace, the contractor will take down the facade of the building, starting with the tallest point. Once there is enough clearance, the contractor will move inside the property line and complete the demolition from within.

After demolishing the building, we will construct a retrieval shaft within the property lines at 1731-1741 Powell Street. The retrieval shaft is an excavation of about 45 ft. by 49 ft., with a depth of approximately 42 ft. We will provide additional details about retrieval shaft construction before it begins.

The SFMTA is working closely with local contractor MH Construction to minimize construction impacts as much as possible while demolition is underway. For more information, check out this fact sheet. Construction details are below.

Planned construction (all dates approximate):

  • Disconnect utilities within building (week of July 8)
  • Set up pedestrian detour (week of July 15)
  • Mobilize demolition equipment (week of July 15)
  • Demolish building (approx. July 15-26)
  • Remove demolished building pieces (week of July 29)
  • Grade the site (week of July 29)
  • Construction hours will be Monday to Friday, 7 a.m. to 3:30 p.m.
  • Demolition takes approximately two weeks to complete, with two additional weeks required to prepare the site, remove the building pieces and grade the lot.

Traffic, transit and pedestrian impacts:

  • Area of impact: Powell Street and Columbus Avenue between Filbert and Union streets
  • The sidewalk in front of 1731-1741 Powell Street will be impacted
  • The Muni 39 Coit may be temporarily rerouted, but no stops will be impacted (see fact sheet for details)
  • Parking restrictions will be in effect in front of the Pagoda Palace on Powell Street and Columbus Avenue
  • Powell Street between Union and Columbus will remain open to traffic, but the traffic lane may be narrowed
  • The contractor will maintain access to adjacent businesses and facilitate the flow of traffic during work hours
  • Dust will be monitored and controlled, and noise will be kept within required decibel levels (see fact sheet for details)

We will provide additional updates via email and on our blog as work proceeds. Should you have any questions, please contact North Beach liaison Andrea Baker at 415.351.8427.

Thank you for your patience and support.

Categories: Construction Updates

Construction Update | June 29-July 15

Construction Updates - Fri, 06/28/2013 - 16:32

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On Stockton Street, we are using this machine to construct underground walls. The walls will be incorporated into the Union Square/Market Street Station.

Note: Because of  the July 4 holiday, this construction update covers construction impacts through July 15. We will not send a construction update email next Friday, July 5; however, we will provide additional details about construction in North Beach early next week. Please contact us at central.subway@sfmta.com with any questions.

During the next 17 days, construction to prepare for tunneling will continue in SoMa and Union Square. In North Beach, Pagoda Palace demolition contractor MH Construction will perform surveys of the site. No Central Subway construction is planned in Chinatown.

In honor of the holiday, Central Subway construction will pause on Thursday, July 4.

For descriptions of construction impacts in each neighborhood, click here or on the links below. We also post construction, traffic detour and Muni impact information on our project Google Map.

Construction impacts are planned to change at these locations by July 15:

  • North Beach: Demolition of the Pagoda Palace Theater is scheduled to start Monday, July 8. For more information about construction at this site, check out this construction notice. We will provide detailed information about construction impacts next week, before demolition begins.
  • Northern SoMa (Market to Harrison): To allow for ground improvements, construction will be underway for 24 hours a day from June 28 until the morning of June 30 on 4th Street between Howard and Folsom (details in the Northern SoMa section). Two lanes of traffic will remain closed on 4th Street between Howard and Folsom. On 4th Street between Market and Stevenson, the sidewalk and two traffic lanes will remain closed on the eastern side of the street.

At these locations, current construction impacts are planned to continue until July 15:

  • Southern SoMa (Harrison to King/Berry): Full closure of 4th Street between Harrison and Bryant will continue some evenings and weekends. Two lanes of traffic will remain open at all other times. Contact us at central.subway@sfmta.com if you have questions about the closure schedule. On Bryant Street at 5th Street, the left lane and several parking spaces will remain closed.
  • Union Square: Stockton Street between Geary and Ellis will remain closed to vehicle traffic. Ellis Street between Stockton and Powell will remain closed to westbound traffic.
  • Chinatown: No construction planned

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

Categories: Construction Updates

Construction Update | June 22-July 1

Construction Updates - Fri, 06/21/2013 - 17:30

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Crews are continuing to assemble tunnel boring machine Mom Chung. The black roll of ribbon is her conveyor belt, where spoils will be transported out of the tunnel.

During the next 10 days, construction to prepare for tunneling will continue in SoMa and Union Square. In North Beach, Pagoda Palace demolition contractor MH Construction will perform surveys of the site. No Central Subway construction is planned in Chinatown.

For descriptions of construction impacts in each neighborhood, click here or on the links below. We also post construction, traffic detour and Muni impact information on our project Google Map.

Construction impacts are planned to change at these locations by July 1:

  • Northern SoMa (Market to Harrison):  Two lanes of traffic will remain closed on 4th Street between Howard and Folsom, but the traffic configuration will change (details in the Northern SoMa section). Construction will be underway on Saturdays until further notice. On 4th Street between Market and Stevenson, the sidewalk and two traffic lanes will remain closed on the eastern side of the street.
  • North Beach: Pagoda Palace demolition contractor MH Construction will perform surveys of 1731-1741 Powell Street. For more information about construction at this site, check out this construction notice. We will provide detailed information about construction impacts before demolition begins.

At these locations, current construction impacts are planned to continue until July 1:

  • Southern SoMa (Harrison to King/Berry): Full closure of 4th Street between Harrison and Bryant will continue some evenings and weekends. Two lanes of traffic will remain open at all other times. Contact us at central.subway@sfmta.com if you have questions about the closure schedule. On Bryant Street at 5th Street, the left lane and several parking spaces will remain closed.
  • Union Square: Stockton Street between Geary and Ellis will remain closed to vehicle traffic. Ellis Street between Stockton and Powell will remain closed to westbound traffic.
  • Chinatown: No construction planned

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

Categories: Construction Updates

Construction Update | June 15-24

Construction Updates - Fri, 06/14/2013 - 17:13

130613_1046_ellis

About 80 feet below Ellis Street, we’re installing pipes into the ground around this shaft. We’ll use the pipes to inject grout into the ground, improving soil conditions near the existing Muni and BART tunnels.

During the next 10 days, construction to prepare for tunneling will continue in SoMa and Union Square. No Central Subway construction is planned in Chinatown or North Beach.

For descriptions of construction impacts in each neighborhood, click here or on the links below. We also post construction, traffic detour and Muni impact information on our project Google Map.

Construction impacts are planned to change at these locations by June 24:

  • Northern SoMa (Market to Harrison):  Two lanes of traffic will remain closed on 4th Street between Howard and Folsom, but the traffic configuration will change (details in the Northern SoMa section). Construction will be underway on Saturdays until further notice. On 4th Street between Market and Stevenson, the sidewalk and two traffic lanes will remain closed on the eastern side of the street.

At these locations, current construction impacts are planned to continue until June 24:

  • Southern SoMa (Harrison to King/Berry): Full closure of 4th Street between Harrison and Bryant will continue some evenings and weekends. Two lanes of traffic will remain open at all other times. Contact us at central.subway@sfmta.comif you have questions about the closure schedule. On Bryant Street at 5th Street, the left lane and several parking spaces will remain closed.
  • Union Square: Stockton Street between Geary and Ellis will remain closed to vehicle traffic. Ellis Street between Stockton and Powell will remain closed to westbound traffic.
  • Chinatown: No construction planned
  • North Beach: No construction planned before June 24, but demolition of the Pagoda Palace is scheduled to begin in June. For more information, check out thisconstruction notice.

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

Categories: Construction Updates

Construction Update | June 8-17

Construction Updates - Fri, 06/07/2013 - 15:43

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Crews continue to prepare tunnel boring machine Mom Chung for launch.

During the next 10 days, construction to prepare for tunneling will continue in SoMa and Union Square. No Central Subway construction is planned in Chinatown or North Beach.

For descriptions of construction impacts in each neighborhood, click here or on the links below. We also post construction, traffic detour and Muni impact information on our project Google Map.

Construction impacts are planned to change at these locations by June 17:

  • Northern SoMa (Market to Harrison):  Two lanes of traffic will remain closed on 4th Street between Howard and Folsom, but the traffic configuration may change (details in the Northern SoMa section). Construction will be underway this Saturday, June 8, and next Saturday, June 15, on this block. On 4th Street between Market and Stevenson, the sidewalk and two traffic lanes will remain closed on the eastern side of the street.

At these locations, current construction impacts are planned to continue until June 17:

  • Southern SoMa (Harrison to King/Berry): Full closure of 4th Street between Harrison and Bryant will continue some evenings and weekends. Two lanes of traffic will remain open at all other times. Contact us at central.subway@sfmta.com if you have questions about the closure schedule. On Bryant Street at 5th Street, the left lane and several parking spaces will remain closed.
  • Union Square: Stockton Street between Geary and Ellis will remain closed to vehicle traffic. Ellis Street between Stockton and Powell will remain closed to westbound traffic.
  • Chinatown: No construction planned
  • North Beach: No construction planned before June 17, but demolition of the Pagoda Palace is scheduled to begin in June. For more information, check out this construction notice.

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

Categories: Construction Updates

Photos: Mayor Lee, public officials, community members celebrate TBM Mom Chung and upcoming start of tunneling

Featured News - Thu, 06/06/2013 - 16:05

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A tour group visits tunnel boring machine Mom Chung beneath busy 4th Street.

Tunnel boring machine Mom Chung is almost assembled and just about ready for launch. This month, the 350-foot-long, 750-ton tunnel-building behemoth will begin her journey north beneath the streets of San Francisco, constructing the city’s first new subway tunnel in decades.

Last week we celebrated Mom Chung’s upcoming journey with an event at the site where tunneling will begin. After speeches by Mayor Edwin M. Lee, Democratic Leader Nancy Pelosi’s Chief of Staff Robert Edmonson, Board of Supervisors President David Chiu, District 6 Supervisor Jane Kim and others, guests toured the underground site where Mom Chung is being assembled. They sent her off by signing their names on her cylindrical shield, wishing her a safe and successful voyage beneath SoMa, Union Square, Chinatown and North Beach.

The photos below are of the event, held last Thursday on and below 4th Street. For more photos, visit us on Flickr. To find out more about the event, check out this press release from the SFMTA.

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Before the event, the stage was set with safety gear for special guests and honored speakers.

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Reporters set up cameras, preparing for the arrival of Mayor Lee and other special guests.

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A cheerful Mayor Lee talks about the many benefits of the Central Subway — reducing travel times, connecting San Francisco’s neighborhoods and preparing for the growth expected in the city in coming years and decades.

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Supervisors Jane Kim and David Chiu listen to Mayor Lee’s speech. The Central Subway (and Mom Chung) will travel through their districts.

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Mayor Lee prepares to cut the cake decorated with TBM Mom Chung. Thanks to Victoria Pastry for creating this delicious treat.

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Central Subway Program Director John Funghi leads the first tour of the excavation, known as a launch box, where Mom Chung is being assembled and will begin tunneling.

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At the entrance to the launch box, tour goers look with awe upon Mom Chung.

 

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Mayor Lee signs Mom Chung. The TBM will help build “our future San Francisco.”

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Others, including Supervisor Chiu, sign their names and messages on the TBM.

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Gina Low Weiss, grandniece of Dr. Margaret “Mom” Chung, after whom the TBM is named, signs her name and writes her message on the machine.

130530_1283_tbm_vip_event

This section of Mom Chung, known as the trailing gear, performs a variety of functions, including carrying excavated spoils out of the tunnel and bringing concrete tunnel segments in.

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After the tour, participants exited the launch box, returning outside to a warm, sunny day.

 

Categories: News

Photos: Mayor Lee, public officials, community members celebrate TBM Mom Chung and upcoming start of tunneling

Press Releases - Thu, 06/06/2013 - 16:05

130530_1253_tbm_vip_event

A tour group visits tunnel boring machine Mom Chung beneath busy 4th Street.

Tunnel boring machine Mom Chung is almost assembled and just about ready for launch. This month, the 350-foot-long, 750-ton tunnel-building behemoth will begin her journey north beneath the streets of San Francisco, constructing the city’s first new subway tunnel in decades.

Last week we celebrated Mom Chung’s upcoming journey with an event at the site where tunneling will begin. After speeches by Mayor Edwin M. Lee, Democratic Leader Nancy Pelosi’s Chief of Staff Robert Edmonson, Board of Supervisors President David Chiu, District 6 Supervisor Jane Kim and others, guests toured the underground site where Mom Chung is being assembled. They sent her off by signing their names on her cylindrical shield, wishing her a safe and successful voyage beneath SoMa, Union Square, Chinatown and North Beach.

The photos below are of the event, held last Thursday on and below 4th Street. For more photos, visit us on Flickr. To find out more about the event, check out this press release from the SFMTA.

130530_1000_tbm_vip_event

Before the event, the stage was set with safety gear for special guests and honored speakers.

130530_1018_tbm_vip_event

Reporters set up cameras, preparing for the arrival of Mayor Lee and other special guests.

130530_1062_tbm_vip_event

A cheerful Mayor Lee talks about the many benefits of the Central Subway — reducing travel times, connecting San Francisco’s neighborhoods and preparing for the growth expected in the city in coming years and decades.

130530_1034_tbm_vip_event

Supervisors Jane Kim and David Chiu listen to Mayor Lee’s speech. The Central Subway (and Mom Chung) will travel through their districts.

130530_1159_tbm_vip_event

Mayor Lee prepares to cut the cake decorated with TBM Mom Chung. Thanks to Victoria Pastry for creating this delicious treat.

130530_1188_tbm_vip_event

Central Subway Program Director John Funghi leads the first tour of the excavation, known as a launch box, where Mom Chung is being assembled and will begin tunneling.

130530_1195_tbm_vip_event

At the entrance to the launch box, tour goers look with awe upon Mom Chung.

 

130530_1233_tbm_vip_event

Mayor Lee signs Mom Chung. The TBM will help build “our future San Francisco.”

130530_1238_tbm_vip_event

Others, including Supervisor Chiu, sign their names and messages on the TBM.

  130530_1256_tbm_vip_event

Gina Low Weiss, grandniece of Dr. Margaret “Mom” Chung, after whom the TBM is named, signs her name and writes her message on the machine.

130530_1283_tbm_vip_event

This section of Mom Chung, known as the trailing gear, performs a variety of functions, including carrying excavated spoils out of the tunnel and bringing concrete tunnel segments in.

130530_1285_tbm_vip_event

After the tour, participants exited the launch box, returning outside to a warm, sunny day.

 

Categories: Press Releases

Construction Update | May 25-June 3

Construction Updates - Fri, 05/24/2013 - 15:16

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Pedestrians cross the street near the Union Square construction site.

During the next 10 days, construction to prepare for tunneling will continue in SoMa and Union Square. No Central Subway construction is planned in Chinatown or North Beach.

For descriptions of construction impacts in each neighborhood, click here or on the links below. We also post construction, traffic detour and Muni impact information on our project Google Map.

Construction impacts are planned to change at these locations by June 3:

  • Northern SoMa (Market to Harrison): On 4th Street between Market and Stevenson, the sidewalk and two traffic lanes will remain closed on the eastern side of the street except from 8 p.m. Thursday, May 30, to 6 a.m. Friday, May 31. At that time, three lanes will be closed. Two lanes of traffic will remain closed on 4th Street between Howard and Folsom, but the traffic configuration may change (details in the Northern SoMa section). Construction will be underway this Saturday, May 25, and Sunday, May 26, on this block.
  • Union Square: Construction will be underway this Sunday, May 26, from 6 a.m. to 4 p.m. Stockton Street between Geary and Ellis will remain closed to vehicle traffic. Ellis Street between Stockton and Powell will remain closed to westbound traffic.

At these locations, current construction impacts are planned to continue until June 3:

  • Southern SoMa (Harrison to King/Berry): Full closure of 4th Street between Harrison and Bryant will continue on some evenings and weekends. Two lanes of traffic will remain open at all other times. Please contact us at central.subway@sfmta.com if you have questions about the closure schedule. On Bryant Street at 5th Street, the left lane and several parking spaces will remain closed.
  • Chinatown: No construction planned
  • North Beach: No construction planned before June 3, but demolition of the Pagoda Palace is scheduled to begin in June. For more information, check out this construction notice.

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

Categories: Construction Updates

SFMTA awards Central Subway’s largest and final major construction contract

Featured News - Fri, 05/24/2013 - 10:13

UMS-rendering-aerial-closeup

Construction of the Union Square/Market Street Station, shown here, is included in the major contract awarded earlier this week.

This week the SFMTA awarded the contract to construct the Central Subway’s stations, train tracks and operating systems to California-based firm Tutor Perini. Tutor Perini’s bid of $840 million was the lowest of three bids received for the contract, SFMTA Contract No. 1300, the largest and final major construction contract for the Central Subway Project.

After review, Agency staff determined that the bid meets contract solicitation requirements and recommended approval. At their meeting Tuesday, the SFMTA Board of Directors voted unanimously to approve the award.

With 25 percent of the contract amount going to certified Small Business Enterprise (SBE) firms, Tutor Perini significantly exceeded the SBE participation goal of 20 percent. In addition, Tutor Perini will set aside at least 50 percent of the contract’s trucking and hauling work for certified SBE firms, invest at least $1.5 million in hiring socially and economically disadvantaged individuals for entry-level jobs, and provide socially and economically disadvantaged individuals with at least 40,000 hours of on-the-job training for construction management positions.

Under Contract 1300, Tutor Perini will construct the following elements of the Central Subway:

  • The Chinatown Station, a subway station with an entrance at Stockton and Washington streets;
  • The Union Square/Market Street Station, a subway station with entrances at Stockton and Geary streets and Stockton and Ellis streets;
  • A concourse connecting the Union Square/Market Street Station to the existing Powell Street Muni/BART Station;
  • The Yerba Buena/Moscone Station, a subway station with an entrance at 4th and Clementina streets;
  • The 4th and Brannan Station, a surface-level station on 4th Street between Brannan and Bryant streets;
  • Surface tracks on 4th Street between 4th and King streets and the subway tunnel portal on 4th Street between Bryant and Harrison streets;
  • Trackbed, tracks, switches and train control systems within the Central Subway tunnel.

In the coming weeks and months, Tutor Perini and the SFMTA will mobilize to begin the major construction associated with the contract. Construction will continue through 2018, with the Central Subway scheduled to open in 2019.

Categories: News

SFMTA awards Central Subway’s largest and final major construction contract

Contract News - Fri, 05/24/2013 - 10:13

UMS-rendering-aerial-closeup

Construction of the Union Square/Market Street Station, shown here, is included in the major contract awarded earlier this week.

This week the SFMTA awarded the contract to construct the Central Subway’s stations, train tracks and operating systems to California-based firm Tutor Perini. Tutor Perini’s bid of $840 million was the lowest of three bids received for the contract, SFMTA Contract No. 1300, the largest and final major construction contract for the Central Subway Project.

After review, Agency staff determined that the bid meets contract solicitation requirements and recommended approval. At their meeting Tuesday, the SFMTA Board of Directors voted unanimously to approve the award.

With 25 percent of the contract amount going to certified Small Business Enterprise (SBE) firms, Tutor Perini significantly exceeded the SBE participation goal of 20 percent. In addition, Tutor Perini will set aside at least 50 percent of the contract’s trucking and hauling work for certified SBE firms, invest at least $1.5 million in hiring socially and economically disadvantaged individuals for entry-level jobs, and provide socially and economically disadvantaged individuals with at least 40,000 hours of on-the-job training for construction management positions.

Under Contract 1300, Tutor Perini will construct the following elements of the Central Subway:

  • The Chinatown Station, a subway station with an entrance at Stockton and Washington streets;
  • The Union Square/Market Street Station, a subway station with entrances at Stockton and Geary streets and Stockton and Ellis streets;
  • A concourse connecting the Union Square/Market Street Station to the existing Powell Street Muni/BART Station;
  • The Yerba Buena/Moscone Station, a subway station with an entrance at 4th and Clementina streets;
  • The 4th and Brannan Station, a surface-level station on 4th Street between Brannan and Bryant streets;
  • Surface tracks on 4th Street between 4th and King streets and the subway tunnel portal on 4th Street between Bryant and Harrison streets;
  • Trackbed, tracks, switches and train control systems within the Central Subway tunnel.

In the coming weeks and months, Tutor Perini and the SFMTA will mobilize to begin the major construction associated with the contract. Construction will continue through 2018, with the Central Subway scheduled to open in 2019.

Categories: Contract News

Construction Update | May 18-27

Construction Updates - Fri, 05/17/2013 - 16:17

DSC_0641

A worker prepares a concrete cylinder for installation underground. The cylinder is one component of a wall that will eventually be integrated into the Union Square/Market Street Station.

During the next 10 days, construction to prepare for tunneling will continue in SoMa and Union Square. No Central Subway construction is planned in Chinatown or North Beach; however, demolition of the Pagoda Palace in North Beach is slated to begin in mid-June.

For descriptions of construction impacts in each neighborhood, click here or on the links below. We also post construction information on our project Google Map.

Construction impacts are planned to change at these locations by May 27:

  • Northern SoMa (Market to Harrison): On 4th Street between Howard and Folsom, two lanes of traffic will remain open, but the traffic configuration will change starting Thursday, May 23 (details at the Northern SoMa link). On 4th Street between Market and Stevenson, the sidewalk and two traffic lanes will remain closed on the eastern side of the street.
  • North Beach: No construction planned before May 27, but demolition of the Pagoda Palace is scheduled to begin in mid-June. For more information, check out this construction notice.

At these locations, current construction impacts are planned to continue until May 27:

  • Southern SoMa (Harrison to King/Berry): Full closure of 4th Street between Harrison and Bryant will continue on some evenings and weekends. Two lanes of traffic will remain open at all other times. Please contact us at central.subway@sfmta.com if you have questions about the closure schedule. On Bryant Street at 5th Street, the left lane and several parking spaces will remain closed.
  • Union Square: Stockton Street between Geary and Ellis will remain closed to vehicle traffic. Ellis Street between Stockton and Powell will remain closed to westbound traffic.
  • Chinatown: No construction planned

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

Categories: Construction Updates

Time Lapse Video: Watch as we install and assemble tunnel boring machine Mom Chung

Featured News - Fri, 05/17/2013 - 10:37

This time lapse video — our first ever — shows the first steps of installing and assembling tunnel boring machine Mom Chung.

For the past few weeks, Central Subway crews have worked day and night to install and assemble our first tunnel boring machine, Mom Chung, underground beneath 4th Street.

We’ve documented the process on three time lapse cameras installed at this major construction site. The cameras took photos every two minutes, and we compiled and edited the images to create the video above.

In it, you’ll see our crews construct a specialized crane, called a gantry crane, over 4th Street to prepare for Mom Chung’s arrival. Then hundreds of tons of massive Mom Chung are lowered underground and assembled by Central Subway workers. The segments seen here make up Mom Chung’s shield (the part that builds the tunnel) and cutter head (the part that excavates). At the end of the video, we install an auger screw, which is used to transport dirt and spoils through the front of the TBM and onto a series of conveyors.

Taken from April 22 to May 3, the video contains 1,917 images. Check it out here or on our YouTube channel. (And be sure to check out our construction videos, too.)

We’ll post more time lapse videos soon, including one of the entire TBM assembly process, as we continue to document construction of this essential improvement to San Francisco’s public transportation system.

Categories: News

Construction Update | May 11-20

Construction Updates - Fri, 05/10/2013 - 16:45

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Crews continue to install subsurface pipes on 4th Street between Market and Stevenson. When the tunnel boring machines pass below, we will use to inject grout into the ground and improve soil conditions here.

During the next 10 days, construction to prepare for tunneling will continue in SoMa and Union Square. No Central Subway construction is planned in Chinatown or North Beach.

For descriptions of construction impacts in each neighborhood, click here or on the links below. We also post construction, traffic detour and Muni impact information on our project Google Map.

Construction impacts are planned to change at these locations by May 20:

  • Southern SoMa (Harrison to King/Berry): The on-ramp to westbound I-80 will remain open next week. Full closure of 4th Street between Harrison and Bryant will continue on some evenings and weekends. Two lanes of traffic will remain open on this block on at all other times. Please contact us at central.subway@sfmta.com if you have questions about the closure schedule. On Bryant Street at 5th Street, the left lane and several parking spaces will remain closed.

At these locations, current construction impacts are planned to continue until May 20:

  • Northern SoMa (Market to Harrison): On 4th Street between Market and Stevenson, the sidewalk and two traffic lanes will remain closed on the eastern side of the street. Two lanes of traffic will remain closed on 4th Street between Howard and Folsom.
  • Union Square: Stockton Street between Geary and Ellis will remain closed to vehicle traffic. Ellis Street between Stockton and Powell will remain closed to westbound traffic.
  • Chinatown: No construction planned
  • North Beach: No construction planned

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

Categories: Construction Updates

Mayor Lee visits tunnel launch site, meets tunneling machine Mom Chung

Featured News - Fri, 05/10/2013 - 14:05

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San Francisco Mayor Edwin M. Lee takes a look at tunnel boring machine Mom Chung in the excavation under 4th Street where tunneling will begin.

Yesterday, Mayor Edwin M. Lee paid a visit to the construction site where tunneling will begin and saw Mom Chung, the 350-foot-long tunnel boring machine currently being assembled underground.

Speaking to reporters in front of the digging cutter head of Mom Chung, Mayor Lee said he was excited about the Central Subway, calling the T Third Line extension “one of the most important projects for the future of San Francisco.”

SFMTA Board Chairman Tom Nolan, SFMTA Director of Transportation Edward D. Reiskin, Central Subway Program Director John Funghi, key city officials and members of Central Subway team accompanied Mayor Lee under 4th Street to show him the major excavation where tunneling will begin. Check out the photos below for more on the Mayor’s visit to this important construction site.

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The tour group heads down the ramp near 4th and Bryant and into the excavation beneath the roadway.

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The tour group makes its way through the excavation and toward Mom Chung. From left to right: Director Reiskin, Mayor Lee, John Funghi, tunnel contract Resident Engineer Sarah Wilson.

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Sarah Wilson, the engineer overseeing construction of the Central Subway tunnels, explains the details of the tunneling process to Mayor Lee. From left to right: SFPUC Assistant General Manager Emilio Cruz, SFPUC General Manager Harlan Kelly, Jr., Mayor Lee, the Mayor’s Chief of Staff Steve Kawa, John Funghi, Sarah Wilson.

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Mayor Lee responds to questions from reporters. From left to right: Director Reiskin, Chairman Nolan, Mayor Lee, John Funghi, SFMTA Board Vice Chairman Cheryl Brinkman, Sarah Wilson.

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The tour group gathers around the front of Mom Chung. Called the cutter head, this spinning excavator will dig through the earth under 4th Street, Stockton Street and Columbus Avenue.

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Representatives of tunnel construction contractor Barnard Impregilo Healy meet Mayor Lee and Director Reiskin. From left to right: Assistant Project Superintendent Andy Granger, Mayor Lee, Project Manager Ben Campbell, Director Reiskin.

Read more about the Mayor’s visit in today’s San Francisco Chronicle. Tunneling is slated to begin in June.

Categories: News

Mayor Lee visits tunnel launch site, meets tunneling machine Mom Chung

Community News - Fri, 05/10/2013 - 14:05

130509_1045_launchbox_mayorlee

San Francisco Mayor Edwin M. Lee takes a look at tunnel boring machine Mom Chung in the excavation under 4th Street where tunneling will begin.

Yesterday, Mayor Edwin M. Lee paid a visit to the construction site where tunneling will begin and saw Mom Chung, the 350-foot-long tunnel boring machine currently being assembled underground.

Speaking to reporters in front of the digging cutter head of Mom Chung, Mayor Lee said he was excited about the Central Subway, calling the T Third Line extension “one of the most important projects for the future of San Francisco.”

SFMTA Board Chairman Tom Nolan, SFMTA Director of Transportation Edward D. Reiskin, Central Subway Program Director John Funghi, key city officials and members of Central Subway team accompanied Mayor Lee under 4th Street to show him the major excavation where tunneling will begin. Check out the photos below for more on the Mayor’s visit to this important construction site.

130509_1007_launchbox_mayorlee

The tour group heads down the ramp near 4th and Bryant and into the excavation beneath the roadway.

130509_1019_launchbox_mayorlee

The tour group makes its way through the excavation and toward Mom Chung. From left to right: Director Reiskin, Mayor Lee, John Funghi, tunnel contract Resident Engineer Sarah Wilson.

130509_1032_launchbox_mayorlee

Sarah Wilson, the engineer overseeing construction of the Central Subway tunnels, explains the details of the tunneling process to Mayor Lee. From left to right: SFPUC Assistant General Manager Emilio Cruz, SFPUC General Manager Harlan Kelly, Jr., Mayor Lee, the Mayor’s Chief of Staff Steve Kawa, John Funghi, Sarah Wilson.

130509_1085_launchbox_mayorlee

Mayor Lee responds to questions from reporters. From left to right: Director Reiskin, Chairman Nolan, Mayor Lee, John Funghi, SFMTA Board Vice Chairman Cheryl Brinkman, Sarah Wilson.

130509_1093_launchbox_mayorlee

The tour group gathers around the front of Mom Chung. Called the cutter head, this spinning excavator will dig through the earth under 4th Street, Stockton Street and Columbus Avenue.

130509_1140_launchbox_mayorlee

Representatives of tunnel construction contractor Barnard Impregilo Healy meet Mayor Lee and Director Reiskin. From left to right: Assistant Project Superintendent Andy Granger, Mayor Lee, Project Manager Ben Campbell, Director Reiskin.

Read more about the Mayor’s visit in today’s San Francisco Chronicle. Tunneling is slated to begin in June.

Categories: Community News

Construction Update | May 4-13

Construction Updates - Fri, 05/03/2013 - 16:09

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Crews are excavating a shaft on Ellis Street near where the Central Subway tunnels will pass beneath the existing BART and Muni tunnels. Crews will perform ground improvements here.

During the next 10 days, construction to prepare for tunneling will continue in SoMa and Union Square. No Central Subway construction is planned to occur in Chinatown or North Beach.

Descriptions of construction impacts in each neighborhood are available here or at the links below. We also post construction, traffic detour and Muni impact information on our project Google Map.

Construction impacts are planned to change at these locations by May 13:

  • Construction impacts continuing at all sites.

At these locations, current construction impacts are planned to continue until May 13:

  • Southern SoMa (Harrison to King/Berry): Full closure of 4th Street between Harrison and Bryant will be in effect some evenings and weekends while we lower parts of the tunnel boring machine into the excavation beneath the roadway. Two lanes of traffic will remain open on this block on at all other times. Please contact us at central.subway@sfmta.com if you have questions about the closure schedule. On Bryant Street at 5th Street, the left lane and several parking spaces will be closed for use as a staging area for tunnel boring machine installation.
  • Northern SoMa (Market to Harrison): On 4th Street between Market and Stevenson, the sidewalk and two traffic lanes will remain closed on the eastern side of the street. Two lanes of traffic will remain closed on 4th Street between Howard and Folsom.
  • Union Square: Stockton Street between Geary and Ellis will remain closed to vehicle traffic. Ellis Street between Stockton and Powell will remain closed to westbound traffic.
  • Chinatown: No construction planned
  • North Beach: No construction planned

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

Categories: Construction Updates

Photos: Installation of Mom Chung, our first tunnel boring machine

Featured News - Tue, 04/30/2013 - 13:34

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This 123-ton ring was the first part of tunnel boring machine Mom Chung to be installed underground. Installation began late Friday night and continued through Saturday morning.

Mom Chung has arrived — all 750 tons of her — and soon she’ll start building San Francisco’s newest subway tunnel, the first constructed in the city since the 1970s.

Mom Chung is one of two tunnel boring machines (TBMs) built specially for the Central Subway Project. The massive machines consist of a rotating cutter wheel (the cutter head), a cylindrical steel shell (the shield) and a 300-foot train of tunnel-building mechanisms (the trailing gear). Starting a few weeks from now, Mom Chung will excavate and construct the tunnel for southbound trains, digging at a rate of about 40 feet per day far beneath the surface of the city. Her twin sister, Big Alma, will begin building the tunnel for northbound trains about two months later.

You can follow both machines on Twitter, at @MomChungtheTBM and @BigAlmatheTBM, for updates as they dig their way north.

On Friday, crews worked through the night to lower the first part of Mom Chung into the major excavation beneath 4th Street where tunneling will begin. The part, one of three rings that make up the shield, is 20 feet in diameter and weighs about 123 tons. Of the 750-ton TBM, this was the heaviest part, and one of the most complicated to install.

Crews will assemble Mom Chung underground over the next four to six weeks. She will then begin tunneling in June, traveling north under 4th Street and Stockton Street through SoMa, Union Square, Chinatown and North Beach. Once she starts tunneling, you won’t hear, see or feel her — she’ll be too far underground and will pass below without a trace above ground.

The photos below show the installation of the first part of Mom Chung both above and beneath 4th Street, from the middle of Friday night until well past sunrise Saturday.

If you would like to see Mom Chung in person, stop by our staging area on Bryant Street at 5th Street. Trucks will deliver pieces of her during the next few weeks. We’ll store the parts on Bryant Street before installing them underground.

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After picking the ring up, the gantry crane maneuvered it into position over the opening of the excavation. The excavation is called a launch box.

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The ring was then lowered into the launch box.

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Now halfway down, here’s a view of the ring from the ramp entering the launch box.

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Crews look on as the 123-ton TBM segment descends underground.

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The crane turned the TBM segment to rest it on a cradle. The other two shield segments and the rotating, excavating cutter head will soon join this first part.

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This is the machinery of Mom Chung — a state-of-the-art assemblage of tunnel-building motors and wires.

For more information about Mom Chung, and to see photos of her before she was disassembled for transport to San Francisco, check out our project website.

Categories: News

Apple Store entrance to Powell Street Station to close for Central Subway construction

Featured News - Mon, 04/22/2013 - 15:12

BART entrance closure

While the Stockton and Ellis entrance is closed, customers may use one of seven other entrances to access the Powell Street Station.

Starting Wednesday, April 24, the entrance to the Powell Street Station located at Stockton and Ellis streets will close to accommodate Central Subway construction. The closure of this entrance, also known as the Apple Store entrance, will be in effect for approximately five years to facilitate construction of the Central Subway tunnel and Union Square/Market Street Station.

When the Central Subway opens in 2019, this entrance will provide convenient access to the T Third Line at the future Union Square/Market Street Station. An underground concourse connection will link the Union Square/Market Street and Powell Street stations, allowing customers to transfer easily between the T Third Line and the BART and Muni Metro lines operating in the Market Street tunnel.

To facilitate access to Powell Street Station while the Apple Store entrance is closed, signage will direct customers to the nearest alternate entrance at 4th and Market streets.

We appreciate your continued patience while construction is in progress.

Categories: News

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