6/29/2011

Building a subway tunnel in San Francisco between the South of Market area and Chinatown is expected to cost $1.6 billion. The project took a step forward when a $233.6 million contract to dig the tunnel was awarded to the joint venture of Barnard Impregilo Healy. A pair of new boring machines will be purchased for $36 million and will be used to dig 8,240 feet of tunnel.

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