A joint venture of of Mott McDonald and PGH Wong Engineering has won the contract to provide general engineering services for Phase II of the 16-mile, six-station Bay Area Rapid Transit (BART) Silicon Valley Extension, which when completed will connect Fremont (Warm Springs) with San José and Santa Clara.
The Santa Clara Valley Transportation Authority (SCVTA) announced the contract winner on Jan. 14. Details of the bid are available on the IRJ Pro website (subscription required.)
The $125 million Phase II contract incorporates six miles of track to expand BART operations from Berryessa/North San José through downtown San Jose to Santa Clara. It includes design and engineering work on a five-mile tunnel (using single-bore tunneling methodology) under San José, two ventilation structures, four stations (three underground and one above), and related work.
Construction is planned to begin by 2021, with passenger service set to launch by 2026. SCVTA expects the service to reach a projected 52,000 weekday riders by 2035. After it is built, the entire extension will be operated by BART and function as part of its regional rapid transit system.
The Phase II project attracted considerable interest in the civil engineering industry. A forum in May 2018 outlining the bidding process for the general engineering contract had 350 interested parties attend.
In 2011, SCVTA awarded a $770 million contract to a consortium of Skanska, Shimmick and Herzon to build Phase I of the Silicon Valley Extension. Phase I is 10-mile, two-station extension from Fremont (Warm Springs) to Milpitas and Berryessa/North San José. It is expected to open in 2019, following delays related to communications networking equipment.