SFPUC breaks ground on first-ever tunnel underneath San Francisco Bay - Dumbarton Bridge

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In late September, Bay Area officials joined the SFPUC to break ground on the first-ever tunnel underneath San Francisco Bay near the Dumbarton Bridge.

The 5-mile-long, 15-foot-diameter tunnel will cross the bay at depths of up to 100 feet and be part of the Hetch Hetchy Water System. The Bay Tunnel project is part of SFPUC’s $4.6 billion regional Water System Improvement Program (WSIP) and is expected to be completed in 2015.

Watch the groundbreaking ceremony on YouTube

 

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