January 18, 2013: The bored tunnel under the San Francisco Bay, the first ever, has broken through after a highly successful 5-mile drive by the Hitachi-Zosen EBPM and the Michels/Jay Dee/ Coluccio JV crews. The breakthrough after midnight on Friday 11 January, completed the drive in 16 months, a full 8 months ahead of schedule.
Congratulations to the JV, Hitachi-Zosen, and the SFPUC.
Construction begins on Bay Tunnel - TunnelTalk, Sept 2010
Hitachi EPBM for Bay Tunnel - TunnelTalk, Sept 2010
Bay Tunnel design - TunnelTalk, Mar 2008