"Every day or every month that we're delayed, we estimate that every month is worth about $20-30 million. The most important thing we can do to keep ourselves on budget is to stay on schedule."
"The machine is a specialized piece of equipment that has a steel shield, so it looks like a sideways steel can," Construction Director Sarah Wilson said."
"To date, we've poured more than 45,000 cubic yards of concrete to form these walls. That's around 4,500 concrete trucks," Wilson said."
Phase two of the BART Silicon Valley project will add six miles of new rail and four stations through downtown San Jose to Berryessa. The extension will include substantial residential, retail, and commercial development estimated at 45 million square feet. The project cost estimate is $12.1–12.5 billion, with delays estimated to cost $20–30 million per month, so staying on schedule is prioritized. Construction uses a single-bore tunnel and a specialized steel-shield machine. Over 90% of the walls for tunneling are complete and more than 45,000 cubic yards of concrete have been poured.
Read at ABC7 San Francisco
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