Silicon Valley BART extension
The Silicon Valley BART Extension will expand service by Bay Area Rapid Transit (BART) into Santa Clara County, from its former terminus at the Fremont station in Alameda County. Planned since at least 1981, the project has seven stations in three sequential phases. The first phase was the Warm Springs BART extension, built by BART at a cost of $790 million, terminating at the new Warm Springs/South Fremont station that opened in 2017. The Warm Springs extension broke ground in 2009, and was originally scheduled for completion in 2014.
|Warm Springs/Silicon Valley BART Extension|
|Status||revenue service (to Warm Springs)|
testing (to Berryessa)
preliminary design (to Santa Clara)
|Locale||southern Alameda County and Santa Clara County|
|Stations||7 + 2 potential infill|
|Commenced||October 1, 2009|
|Planned opening||2020 (to Berryessa)|
2029 –2030 (to Santa Clara)
|Opened||March 25, 2017(to Warm Springs)|
|Rolling stock||Bay Area Rapid Transit rolling stock|
|Track gauge||1,676 mm (5 ft 6 in)|
|Electrification||Third rail, 1000 V DC|
The $2.3-billion second phase, known as phase I of Silicon Valley BART Extension or the Berryessa extension, includes two new stations, the Milpitas and Berryessa/North San Jose stations. Both stations are expected to open sometime in 2020. The Berryessa extension broke ground in 2012, and was originally scheduled for completion in 2016.
The Santa Clara Valley Transportation Authority (VTA) is building the Berryessa extension, while BART will operate and maintain the entire extension. The two agencies have had differing timelines for the start of service, with VTA's being more optimistic. BART has expressed caution as to the timeline.
The $5.6-billion third phase to downtown San Jose remains unfunded. Targeted for completion in 2029–2030, it would add three new subway stations south of Berryessa: Alum Rock/28th Street, Downtown San Jose—West Option, Diridon—North Option, and a surface station in Santa Clara. Initial testing and preliminary construction activities began in January 2019.
In 2000, Santa Clara County voters approved a 30-year half-cent sales tax increase to fund BART, which took effect in 2006. To make up for a shortfall in projected federal funding, an increase in the sales tax by 0.125 percent was proposed if additional federal funding were secured.
The economy worsened in 2009, and the 2000 sales tax was projected to generate $7 billion—short of the originally expected $11 billion. As a consequence, the number of planned stations was reduced. In addition, the line from Berryessa to downtown San Jose was delayed until 2026. pushed back from 2025.
VTA awarded $770 million to Skanska-Shimmick-Herzog in 2011 for the first phase of the Berryessa Extension (Milpitas and Berryessa/North San Jose Stations), and the federal government granted $900 million for the project in 2012. Construction began the same year. It was scheduled to open in 2016.
For phase II, VTA sought funding from the federal New Starts program in 2016. A half-cent 30-year sales tax passed in the 2016 elections, to raise $6.0 to $6.5 billion with up to 25% of this (or $1.6 billion) for BART. VTA also sought $1.5 billion from New Starts, and $750 million from the California Cap and Trade program.
In 2018, VTA was awarded $2.6 billion for the project from the state's Transit and Intercity Rail Capital Program funded by the 2017 gas tax bill. VTA anticipates receiving a Full Funding Agreement from the FTA in late 2021. In August 2019, the VTA received $125 million from the FTA under a new accelerated funding program.
The project is broken into three phases.
|Phase||Name||Length||Stations||Start||Complete||Cost ($ billions)||Ref|
|1||Warm Springs (WSX)||5.4 mi (8.7 km)||Irvington[a]||September 30, 2009[b]||March 25, 2017||0.79|||
|2||Berryessa (SVX Phase 1)||10 mi (16 km)||Calaveras[a]||April 12, 2012||2020 (planned)||2.4|||
|Berryessa/North San José|
|3||Downtown San Jose/ Santa Clara (SVX Phase 2)||6 mi (9.7 km)||Alum Rock||2020 (planned)[c]||2029–2030 (planned)||5.6|||
|Downtown San Jose|
- Future infill station
- Groundbreaking for the construction of the Fremont subway section occurred in 2009. Preliminary site preparation work for the Paseo Padre/Washington grade separation project began in June 2005.
- Preliminary subsurface exploration started in late January 2019.
Warm Springs extensionEdit
The 5.4-mile-long (8.7 km) extension to Warm Springs was constructed by BART south from the existing Fremont station (opened in 1972) to the new Warm Springs/South Fremont station; revenue service began in March 2017. The original estimate was $890 million, but the cost of the subway segment under the lake in Fremont was reduced by 45% from the original estimate of $249 million to $136 million, bringing the total cost to $790 million.
The Warm Springs/South Fremont station opened on March 25, 2017. The extension broke ground in 2009, and was originally scheduled for completion in 2014. Construction of the station began in 2011, and was expected to take three and a half years. However, the opening was delayed repeatedly, and ultimately pushed back to spring 2017.
The Berryessa Extension (itself divided into two phases) extends south from the Warm Springs/South Fremont station.
The 10-mile-long (16 km) Berryessa extension to north San Jose encompasses the Milpitas station and the Berryessa station. A proposed infill station at Calaveras Boulevard in downtown Milpitas has been deferred until the city secures funding. Milpitas Station connects to VTA's Montague light rail station near the Great Mall of the Bay Area via a pedestrian bridge.
Originally the entire Silicon Valley Extension from Fremont to Santa Clara was proposed as one megaproject, but lower than expected federal funding and sales tax revenue eliminated some stations from the original project and caused the division into two phases. Phase 1 extends to Berryessa, and Phase 2 will extend through downtown San Jose to Santa Clara. The Phase 1 scope was set by what VTA could afford. A local industrial park sued in 2011, without success, on environmental grounds claiming that the extension would reduce vehicular access.
As of November 2019[update], Milpitas and Berryessa/North San Jose stations are planned to open sometime in 2020. The project has been beset by delays, and completion has been pushed back many times from the originally-planned 2016, to late 2017, June 2018, fall 2018, January–March 2019, October 2019,, November 2019, and December 2019.
Downtown San Jose/Santa Clara extensionEdit
The final Downtown San Jose/Santa Clara leg has been planned through downtown San Jose to Santa Clara at an estimated cost of $5.6 billion. The third phase, 6 miles (9.7 km) long, is largely underground, featuring a 5-mile-long (8.0 km) tunnel. It would continue south from Berryessa, entering a tunnel to cross the Bayshore Freeway before continuing to the proposed Alum Rock/28th Street subway station on the city's "east side". From Alum Rock, the tunneled extension would continue west under Santa Clara Street to a proposed Downtown San Jose subway station, which would be an interchange station to VTA light rail lines on the surface at Santa Clara. The original proposal had additional subway stations between Alum Rock and Downtown at Civic Plaza/SJSU and Plaza de César Chávez, but these were consolidated into a single station to cut costs. The line would continue underground to the San Jose Diridon station, a transfer point to Amtrak, Caltrain, Altamont Corridor Express, VTA Light rail and bus, and the planned California High Speed Rail system. The proposed BART subway station would be named "Diridon" to match. The extension would then surface and continue to the proposed Santa Clara Caltrain Station. A 40-acre (16 ha) BART maintenance yard would also be created at Newhall as part of this phase, using land just south of Santa Clara station that was purchased by VTA from Union Pacific. Like the Berryessa Extension, it would be built by VTA, but operated by BART.
After funding was secured for Berryessa (the first phase of the Silicon Valley Extension) in March 2012, VTA began looking for additional funding to complete the $5.6 billion second phase. Completion is expected in 2029–2030.
In late 2017, a disagreement arose between VTA and BART, over whether the tunnel design should have a single bore or dual bores. VTA favored a single-bore, 45-foot-wide (14 m), configured as a double-deck stack, with one track on the upper level and one on the lower level. VTA preferred a single bore to shorten the construction schedule and avoid cut and cover construction in Santa Clara Street for station sites. City officials believed cut and cover construction would be disruptive to streets and businesses, citing the construction of the Market Street Subway as evidence. The single-bore design is newer, but less tested in the United States. However, BART preferred dual bores used elsewhere in its system, to cut construction cost and standardize the procedure for emergency evacuations. The twin bores would each be 20 feet (6.1 m) wide, and separated horizontally. Local businesses, cities and VTA were lobbying for a single bore in 2018. The design decision was postponed for three months; in March, BART and VTA reached agreement on a single bore. The $125 million contract for engineering the single bore tunnel was awarded to a joint venture bid placed by London-based Mott MacDonald and San Francisco-based PGH Wong Engineering.
Initial construction and soil sampling began in January 2019. Warnings of delayed construction started in September, It was announced that the project would be delayed three to four years, with revenue service to begin in 2029–2030.
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- "Milpitas, Berryessa BART Stations Won't Open This Year". November 19, 2019. Retrieved November 20, 2019.
The long-anticipated Berryessa and Milpitas BART stations will not open this year. When construction began, the stations were supposed to open in 2016, but delays have pushed back the opening dates. Santa Clara Valley Transportation Authority is building the BART extension into the South Bay and BART will operate the system.
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Transportation leaders on Monday signed final documents pledging $900 million in federal funds for the $2.3 billion Berryessa extension, scheduled to open in 2016.
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The project will extend BART to the new Diridon Station in downtown San Jose…[with] overall $5.6 billion project costs…
- "Federal government readies to give BART's San Jose extension first installment…for the $5.6 billion project…". August 28, 2019. Retrieved October 26, 2019.
the Santa Clara Valley Transportation Authority (VTA)…is designing and building the $5.6 billion extension…
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The BART Silicon Valley Phase II project is a 6.5-mile extension…from the Berryessa Station through downtown San Jose…The total estimated project cost is $5.58 billion…
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At one point, political and business leaders had anticipated BART service beginning in 2026 in downtown San Jose, but the new estimates from VTA point to a service launch more in the 2029 or 2030 time frame…
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Can we really expect BART to San Jose by next year? … A That's what the Valley Transportation Authority insists, even though its website lists 2018.
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Revenue service will not start on Dec. 28, 2019 if VTA does not resolve the discrepancies necessary for BART to start pre-revenue testing by Oct. 21, 2019
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Construction on the second phase, which includes track work, the station, line and systems, is anticipated to start next year. BART officials believe construction will last about three and a half years, and the new station to be named South Fremont should be open in 2014.
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Commencement of revenue service to Warm Springs Target Late 2014
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Construction of the design-build Line, Track, Station and Systems (LTSS) contract, which began in October of 2011, is expected to be physically completed in summer 2016.
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Software troubles could mean BART’s $900 million Warm Springs extension in Fremont will not be up and running until spring, officials acknowledge.
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VTA officials . . . are now saying the opening looks closer to January or even March next year.
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