San Francisco County Transportation Authority — Moving the City

San Francisco County Transportation Authority
Moving the City

Transbay Transit Center and Caltrain Downtown Extension

Visualization of the Transbay Transit Center concourse

The Transbay Transit Center/Caltrain Downtown Extension (TTC/DTX) project is the critical centerpiece of a long-range visionary transportation plan that will transform downtown San Francisco and regional transportation well into this century. The project consists of three interconnected elements: 1) replacing the outmoded terminal with a modern terminal; 2) extending Caltrain 1.3 miles from Fourth and King streets to the new TTC at First and Mission streets, with accommodations for future high-speed rail; and 3) creating a new transit-friendly neighborhood with 3,000 new homes (35 percent of which will be affordable) and mixed-use commercial development. The total program budget is currently estimated at $4.1 billion in year-of-expenditure dollars. In May 2010 the Transbay Joint Powers Authority (TJPA) Board adopted a $1.6 billion budget for Phase 1 (TTC, pedestrian ramps, and the train box, which is the subterranean portion of the TTC building that will house the Caltrain and high-speed rail station). The current estimate for Phase 2 (DTX) is $2.5 billion.

The Prop K Expenditure Plan includes $270 million (in 2003 dollars) for the project. Of this amount, $237.7 million is designated as Priority 1 and $32.3 million as Priority 2 funds. The Expenditure Plan specifies that the downtown rail extension and the terminal, known as the Transit Center Building, are to be built as a single integrated project. To date, the Authority has allocated $147 million in Prop K funds to the project.

During calendar year 2011, the TJPA continued its efforts on Program Management/ Program Controls, design and engineering for the TTC, preliminary engineering for the DTX, survey and environmental consulting work, and Right of Way acquisitions. In November 2011 Pelli Clarke Pelli Architects completed the 100% substructure construction package, which will be advertised for construction in February 2012. The above-grade package was 95% complete at the end of the year.

With Preliminary Engineering complete for the DTX, Parsons Transportation Group continued coordination with Caltrain and the California High-Speed Rail Authority (CHSRA).

Evans Brothers completed work on the $187 million contract for the demolition of the existing terminal and ramps in October 201, with 55,000 labor hours without accident or injury. The $187 million contact with Balfour Beatty for the construction of the buttress, excavation, and shoring of the new TTC building, is underway. Construction of the TTC is expected to be complete in late 2016. Bus operations are scheduled to commence in August 2017. Meanwhile, bus operations continue at the new temporary terminal.

The DTX is scheduled for completion in 2019; however, work is on hold due to a funding gap.

Project Schedule

TIMEFRAMEspacer image
ACTIVITY
August 2010   AC Transit, Golden Gate Transit, Greyhound, Muni, SamTrans, and WestCAT Lynx begin operations at the Temporary Terminal.

Utility relocation begins around Transit Center site.

Geotechnical work begins in Minna and Natoma alley.

Demolition of Transbay Terminal begins.
Fall 2010   Demolition of East Loop (phase II of Temporary Terminal) begins.
December 2010   Phase II of Temporary Terminal construction is completed.
Early 2011   Utility relocations in areas surrounding the Transit Center begin.

Demolition of the Transbay Terminal and bus ramps continues.
Spring 2011   Pre-trenching and pile extraction for below grade shoring and foundation construction begins.
Summer 2011   Completion of demolition activities.

Shoring wall and foundation construction begins.
Late 2011   Completion of utility relocation activities.
Early 2012   Excavation and bracing for Transit Center below grade structure begins.
Late 2012   Construction of Bus Storage Facility begins.

Construction of Transit Center below grade structure begins.

Construction of Transit Center bus ramps begins.
Spring 2014   Construction of Transit Center above ground superstructure begins.
2017   Construction of Transbay Transit Center is completed.
 
copyright line background image