Bay Area Rapid Transit = BART. The Transbay tube is near the ocean floor, and connects San Francisco with Oakland. They are just now getting to this, and BART was established in the 1970s...? BART: coming to the Silicon Valley, soon (extending Fremont line into San Jose)...
OAKLAND -- BART directors on Thursday unanimously approved a $7.7 million contract for the next phase of strengthening the 3.6-mile-long Transbay Tube to make sure it's safe during earthquakes.
The contract calls for California Engineering Contractors of Pleasanton to install steel plating inside the tube.
The work is a small part of BART's $1.3 billion, 10-year earthquake safety program aimed at protecting its core system against a major earthquake.
The work involves bolting 2.5-inch steel plates on the concrete wall of the tunnel that runs under the Bay between San Francisco and Oakland. The work is expected to begin this spring and be completed about two years later.
BART's earthquake safety program has been underway since 2001 and transit agency officials say significant work to strengthen the tube has already been completed.
http://www.mercurynews.com/breaking-news/ci_19831968
