VTA’s BART Silicon Valley Phase II Project is a six-mile, four-station extension that will expand BART operations from Berryessa/North San José through downtown San José to the city of Santa Clara. The Phase II Project will include an approximately five-mile tunnel, two mid-tunnel ventilation facilities, a maintenance facility and storage yard, three underground stations (Alum Rock/28th Street, Downtown San José, Diridon), and one at-grade station (Santa Clara). The subway tunnel will be in a single-bore configuration.

Single-Bore TunnelThe tunnel will be constructed as a single, large diameter tunnel. The approximately 45 foot tunnel will contain two independent trackways, one for each direction of travel. The passenger platforms would be located within the tunnel, connected to station entrances via underground passageways. Depending on the station, the platforms will be approximately 66 and 85 feet below ground.

Within the tunnel there will be emergency egress points spaced every 300 to 600 feet that will allow passengers to reach non-affected areas during an emergency situation. The tunnel would be excavated with a Tunnel Boring Machine (TBM) at an average depth of 60 feet. At stations, soft ground mining techniques will be used to excavate the underground connections between the tunnel (which contain the boarding platforms) and the off-street station concourses.

How does a Tunnel Boring Machine (TBM) Operate?A tunnel boring machine (TBM) is a large drill that excavates and installs the initial tunnel lining that supports the tunnel needed for the train to travel underground. The front section of the TBM (the cutterhead) chips, grinds, and removes the dirt.

• Within the large hole created, precast concrete segments will be installed to form rings to support the tunnel. The precast rings will be sealed to prevent water and mud from seeping into the tunnel.

• The soil will be removed via the launch portals and either hauled away or reused.

• The TBM will be powered by a temporary substation and will enter and exit the tunnel through either of the portals.

• Once the TBM has completed digging the tunnel, the track and facilities can be installed. The specific type of machine and path of travel will be determined as the project progresses.

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Istanbul Straight Road Project

Twin-BoreRunning Tunnel

Single-BoreRunning Tunnel

UtilitiesUtilities

Up to ~60'Up to ~60'

Up to ~75'Up to ~75'

• Mined cross-passage for emergency evacuation between tunnels

• Sliding re door for emergency evacuation between tracks when side-by-side

March 2018

Track Con gurations in Running TunnelVTA’s BART Silicon Valley Phase II Extension Project

VTA’s BART Silicon Valley Program Overview

VTA is extending the BART regional heavy rail system to Milpitas, San Jose, and Santa Clara. The 16-mile extension, called the BART Silicon Valley Program, will extend the BART system south of BART’s future Warm Springs/South Fremont Station in Fremont to Milpitas, San Jose, and Santa Clara. When completed, this fully grade-separated project is planned to include six stations and a new maintenance and storage facility in Santa Clara. VTA’s BART Silicon Valley Program is being delivered in two phases. The Berryessa Extension Project (Phase I) is under construction and scheduled to open in 2018, with stations in Milpitas and the Berryessa area of San Jose. The Phase II Extension Project (Phase ll) will include a 5-mile-long subway tunnel through downtown San Jose and will extend the BART system from the future Phase I terminus for approximately six miles to the City of Santa Clara. Four stations are proposed for Phase II: Alum Rock/28th Street, Downtown San Jose, Diridon, and Santa Clara.

Phase II SchedulePublic Review of Draft Environmental Document (SEIS/SEIR)..................... December 2016 through March 2017

Preparation of Final SEIS/SEIR .................................................................... March 2017 through January 2018

Release of Final SEIS/SEIR........................................................................... February 2018

VTA Board Approves Project......................................................................... April 2018

FTA Approves Project.................................................................................... June 2018

Construction Begins...................................................................................... 2018

Passenger Service......................................................................................... 2026

FACT SHEET: BART Silicon ValleyVTA’s BART Silicon Valley Phase ll Extension Project

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FACT SHEET: VTA’s BART Silicon Valley Phase II Extension Project

Contact Us(408) 321-7575

(408) 321-2300

(408) 321-2330 TTY

www.vta.org

facebook.com/bartsv twitter.com/bartsv

vtabart@vta.org

How will the community be impacted during construction? The single-bore tunneling methodology reduces construction impacts over traditional methods by conducting most excavation without disrupting the street. However, a major construction project like the Phase II Project will have impacts to the community. For example, during construction, including utility relocations, there will be sidewalk and lane closures as well as contained impacts at the station entrances, portals and ventilation structures. VTA will continue to work with the cities of San José and Santa Clara, the construction contractors, the public, and local residents and businesses to minimize impacts to the extent possible. Major construction is expected to start on the project in 2020.

Taylor RdMcKee Rd

13th St 19th St11th St

10th St

4th St

1st St

Market St

24th StSanta Clara St

W.Santa Clara St

W Hedding St

N 1st St

Coleman Ave

NOT TO SCALE

N

Mineta San Jose

International Airport

Newhall Maintenance

Facility

680

680

280

880

87

87

101

101

880

Phase I AlignmentPhase II At-Grade AlignmentPhase II Single-Bore Tunnel Alignment

LEGEND

13th Street Ventilation Facility

East Portal (Typical Portal)

West Portal (Typical Portal)

Typical Underground Station

Stockton Avenue Ventilation Facility

SANTA CLARA STATION

DOWNTOWN SAN JOSÉ STATIONDIRIDON STATION

ALUM ROCK/ 28TH STREETSTATION

BERRYESSA/ NORTH SAN JOSÉ

STATION

VTA’s BART Silicon Valley Phase II Extension ProjectDraft Recommendations May 2018

VTA’s BART Silicon Valley Program Overview

VTA is extending the BART regional heavy rail system to Milpitas, San Jose, and Santa Clara. The 16-mile extension, called the BART Silicon Valley Program, will extend the BART system south of BART’s future Warm Springs/South Fremont Station in Fremont to Milpitas, San Jose, and Santa Clara. When completed, this fully grade-separated project is planned to include six stations and a new maintenance and storage facility in Santa Clara. VTA’s BART Silicon Valley Program is being delivered in two phases. The Berryessa Extension Project (Phase I) is under construction and scheduled to open in 2018, with stations in Milpitas and the Berryessa area of San Jose. The Phase II Extension Project (Phase ll) will include a 5-mile-long subway tunnel through downtown San Jose and will extend the BART system from the future Phase I terminus for approximately six miles to the City of Santa Clara. Four stations are proposed for Phase II: Alum Rock/28th Street, Downtown San Jose, Diridon, and Santa Clara.

Phase II SchedulePublic Review of Draft Environmental Document (SEIS/SEIR)..................... December 2016 through March 2017

Preparation of Final SEIS/SEIR .................................................................... March 2017 through January 2018

Release of Final SEIS/SEIR........................................................................... February 2018

VTA Board Approves Project......................................................................... April 2018

FTA Approves Project.................................................................................... June 2018

Construction Begins...................................................................................... 2018

Passenger Service......................................................................................... 2026

FACT SHEET: BART Silicon ValleyVTA’s BART Silicon Valley Phase ll Extension Project

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