The Warm Springs Extension Project (WSX) is a 5.4-mile BART extension south from the Fremont BART Station into the Warm Springs District of Fremont. The project has been split into two construction contracts, the Fremont Central Park Subway Construction Contract (the Subway) and the Line, Track, Station and Systems Contract (the Line or LTSS). The Subway will be constructed from just south of Walnut Avenue through Fremont Central Park. The Line contract, which will be design-build, will include the final design and construction of the Warm Springs/South Fremont Station, the above ground trackway, the tie-in at the Fremont Station and the transit systems (traction power, electrification, train control, and communications) for the entire extension.
The trackway will be on retained fill through the south end of the Fremont Station parking lot and will cross over Walnut Avenue on a new overpass structure. The trackway will be on embankment once again south of Walnut Avenue and transition to a subway just north of Stevenson Boulevard. The trackway will be in a subway beneath Fremont Central Park and emerge just east of the UPRR track on the east edge of the park. Two above-ground ventilation structures will be constructed within the park to house emergency ventilation equipment associated with the subway. Once through Central Park, the trackway will then transition back to grade and run essentially parallel to the UPRR track over Paseo Padre Parkway on a new overpass structure, under Washington Boulevard, under Auto Mall Parkway and finally over South Grimmer Boulevard on a new overpass structure into the Warm Springs/South Fremont Station site. For an illustration visit www.bart.gov/wsx.
Despite being the site of a major construction project for approximately three and a half years, the park remained open and all facilities were maintained for public use during construction. Some park facilities were relocated prior to subway construction, including the dog park, basketball courts and associated parking. The tennis center parking was expanded as well to offset the loss of public parking during subway construction. A temporary cofferdam was constructed to allow for the de-watering of the eastern lobe of Lake Elizabeth and to provide continuity in the lake's perimeter walking path during subway construction. Other key pedestrian pathways were maintained, albeit occasionally detoured, during subway construction. Construction of the subway included installation of an extensive ground treatment program and construction of two ventilation structures. These ventilation structures, one located near the softball four-plex and the other south of Lake Elizabeth, received landscape planting treatments consistent with their surroundings to reduce their visual impacts. Additional public parking was provided near the northern ventilation structure as part of the project. Major construction in Fremont Central Park was completed in late 2012.
Completed in 2010, the City’s Grade Separation project separated automobile, bicycle and pedestrian traffic from the active UPRR railroad track and eliminated multiple grade crossings by building a vehicular overpass on Washington Boulevard and a vehicular underpass at Paseo Padre Parkway. The Grade Separation project also relocated a portion of the active UPRR track and numerous utilities through the project area. The Grade Separation project was carefully planned by the City and BART to accommodate the WSX project as well. For more information on this project, visit www.fremontgradesep.com.
Just to the east of Fremont Central Park and north of Paseo Padre Parkway, the UPRR track was positioned by the City's Washington Boulevard/Paseo Padre Parkway Grade Separation project into a temporary alignment to facilitate construction of the WSX Subway. In the fall of 2011, the UPRR track was successfully shifted to its final alignment over the top of the recently completed subway, thus completing a sequence that had been carefully planned by BART, the City of Fremont and UPRR nearly a decade ago.
The Warm Springs/South Fremont Station, to be constructed as part of the Line, Track, Station and Systems (LTSS) Contract, will be located on Warm Springs Boulevard, between South Grimmer Boulevard and Warm Springs Court. The station will feature 34 acres of bus intermodal, passenger drop off areas, automobile and bicycle parking, plus pedestrian and bicycle pathways. The trackway and the station’s platform will be at-grade, with an elevated concourse. BART patrons will enter the station’s concourse via a pedestrian overpass and then, after passing through the fare gates, descend to the platform level below. Vertical circulation elements will include stairs, escalators and elevators.
The future Irvington Station has been planned to be located just south of Washington Boulevard along Osgood Road. This future station has been cleared environmentally as part of the WSX project as an "Optional" station, pending funding by the City of Fremont. The Irvington Station has been planned to be a side platform station with the trackway level at-grade and the concourse level situated above. Station access would be from pedestrian overpasses built over Osgood Road to the east and the UPRR track to the west.
During construction of the WSX trackway at the south end of the Fremont Station parking lot, several hundred parking spaces will be temporarily unavailable to the public. During this period, which began in August 2013 and is anticipated last approximately a year, BART has arranged for equivalent replacement parking nearby including shuttle service to the Fremont Station. A majority of the impacted parking spaces will be returned to service following construction of the WSX trackway embankment. Various pedestrian improvements will also be implemented in the southern portion of the station and along Walnut Avenue. The covered seating areas on the west side of the station also received art tile treatment to improve their appearance. For additional information on Fremont Station impacts, visit our construction updates section: http://www.bart.gov/about/projects/wsx/updates
Traffic on Walnut Avenue, South Grimmer Boulevard and Stevenson Boulevard will be temporarily impacted by construction of BART overpass structures. Work at Stevenson Boulevard has been completed. For more information on specific impacts, visit our construction updates section: http://www.bart.gov/about/projects/wsx/updates
During the course of WSX project construction it will be necessary to remove a certain number of existing trees. Prior to completion of the project, BART will provide replacement trees within the project corridor for all removed "landscape" trees (those not part of riparian or wetland vegetation) six inches or greater in diameter at 4.5 feet above ground on a one for one basis if replaced with a 24-inch box size tree, or a three for one basis if replaced with 15 gallon size trees. Impacted trees associated with riparian habitat will be mitigated in terms of acreage rather than number of trees, in accordance with the requirements of the San Francisco Regional Water Quality Control Board, California Department of Fish and Game, and the United States Army Corps of Engineers. As a result, the number of trees restored at Mission Creek for temporary construction impacts will be slightly greater than one to one. For mitigation of permanent impacts to riparian vegetation, which cannot be restored on site, BART will compensate for the loss of these trees at an off-site location adjacent to the project site at a ratio of 3.5 acres for every 1 acre impacted.
BART will compensate for permanent impacts to open waters and wetlands at an off-site location adjacent to the project site. Wetlands will be restored at a ratio of 4 acres for every 1 acre impacted. Open water impacts will be restored at a 1 to 1 ratio based on linear feet impacted. Mitigation of these impacts will occur upon completion of the Subway Contract.
As part of the project, sensitive cultural resources will be treated in accordance with approved plans and applicable laws.
As part of the WSX project, BART will mitigate impacts to potential habitat for special status species such as the California Tiger Salamander, the California Red Legged Frog and the Western Burrowing Owl. A comprehensive biological monitoring program is in effect during project construction and all project staff and construction personnel will receive environmental awareness training.
Construction and operational noise and ground borne vibration will be mitigated consistent with the project’s environmental documents and applicable FTA Guidelines. In certain areas sound walls will be constructed as part of the project to mitigate anticipated operational noise impacts.
The WSX project is intended to extend BART service closer to the Alameda/Santa Clara County Line. The SVRT project is intended to extend BART service southward from the Warm Springs/South Fremont Station to new stations in Milpitas, San Jose and Santa Clara. The SVRT project is sponsored by the Santa Clara County Valley Transportation Authority (VTA), which is responsible for its implementation under an agreement with BART. For more information on the SVRT project visit www.vta.org/bart.
No. Once SVRT service begins, there will be a direct and seamless BART connection through Warm Springs/South Fremont Station to stations in Santa Clara County. More information regarding service lines and schedules will be determined closer to opening.