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San Francisco Bay tunnel to carry water

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Published: July 27, 2009 at 2:26 PM

SAN FRANCISCO, July 27 (UPI) -- A San Francisco city official says a 5-mile-long tunnel and pipeline will be built beneath San Francisco Bay to carry water supplies in case of an earthquake.

Ed Harrington, San Francisco Public Utilities Commission general manager, said with the Bay area expected to endure a major earthquake in the next 30 years, the new tunnel will ensure area residents have post-quake water supplies, the San Francisco Chronicle reported Monday.

"By building extra tunnels and strengthening our pipelines, it means we have much greater assurance that we'll have water after the next earthquake," said Harrington, whose commission is behind the project.

The plan calls for a 14-foot-high corridor under the bay from Menlo Park to Newark. That corridor -- to be carved through bedrock, clay and sand -- will later house a 9-foot-high steel water pipe.

The Chronicle said the tunnel project, which is part of a larger San Francisco Public Utilities Commission water system upgrade plan, is expected to cost $347 million.

Bids for the tunnel project will be released to the public Friday.

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