The tunnel, which runs longer than 15 football fields and required 70,000 cubic yards of poured reinforced concrete, took three years to complete. Once in operation, it will take BART trains, traveling an average speed of just under 70 mph, about 50 seconds to travel the new subway and come out the other side.
This milestone helps pave the way toward a grand opening of the new Warm Springs/South Fremont station in late 2015. The Warm Springs Extension will add 5.4 miles of new tracks from the existing Fremont Station south to a new station in the Warm Springs District of the city of Fremont. The extension project, which is currently on-time and on-budget, is the first step toward seamlessly connecting BART passengers to Silicon Valley.