The Valley Transportation Authority (VTA) has begun construction on the BART expansion in Silicon Valley, which includes a significant 5-mile underground tunnel and four new stations in San Jose and Santa Clara. The project, estimated at a cost of $12.75 billion, involves contractors working around the clock to extract bentonite soil to establish a launch site for the tunnel boring machine. Preparations started in April 2024, and the initial phase is contracted to Kiewit Shea Traylor, who might be replaced if an agreement on tunneling costs cannot be achieved.
The VTA's construction for the BART expansion through Silicon Valley is actively underway, marking a significant step with a $12.75 billion investment for improved transit.
Contractors have been diligently working at the Newhall Maintenance Yard, pulling bentonite from over 80 feet underground to prepare for the new tunnel boring machine.
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