Bay Tunnel groundbreaking - TunnelCast
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September 24, 2010: Construction begins on the 5-mile (8km) long water supply tunnel under the San Francisco Bay. Michels/Jay Dee/Coluccio JV won the contract with a bid of $215.3 million, $55 million below the Engineer's Estimate. A Hitachi Zosen EPBM is on order and scheduled to arrive on site in May 2011.

Hitachi EPBM for Bay Tunnel - TunnelTalk, Sept 2010
Bay Tunnel design - TunnelTalk, Mar 2008

Snapshot

Construction begins on Bay Tunnel for SFPUC

Paula Wallis reports for TunnelTalk
Location:
San Francisco Bay
Dimensions:
Single bore, about 5 miles (8km) long, under the San Francisco Bay at depths ranging from 75ft to 110ft (22-33m), segmentally lined to 108in (3m) i.d. and finished with steel carrier pipes.
Type:
Water tunnel
Owner:
San Francisco Public Utilities Commission
Contract Value:
$215.3 million
TBMs:
Hitachi Zosen EPBM
Segment production:
Traylor Shea Precast, Stockton
Contractor:
Michels/Jay Dee/Coluccio JV
Designer:
Jacobs Associates
Construction Management:
Jacobs Engineering