Crystal Springs Bypass Tunnel - TunnelTalk
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Sep 30, 2009: Shank/BB JV lowered the TBM into the south shaft in preparation for its 4200ft drive to complete the Crystal Springs Bypass Tunnel for the SFPUC.

Crystal Springs Bypass Tunnel awarded - TunnelTast, Oct 2008
Water tunnels to recharge aging system - TunnelTast, Sep 2009
Bay Tunnel for the SFPUC - TunnelTast, March 2008

Snapshot

New Crystal Springs Bypass Tunnel

Paula Wallis reports for TunnelTalk
Location:
San Mateo County, CA USA
Tunnel:
4200ft x 8ft i.d. diameter
Contract Value:
$55.67 million
Owner:
San Francisco Public Utilities Commission
Awarded:
October 2008
Contractor:
Shank/Balfour Beatty JV
Construction Manager
Jacobs Associates
Designer:
ARUP/Brierley
TBM:
12ft diameter TBM designed by Shank and fabricated by Hitachi Zosen.
Completion Date:
September 2011
Program:
Part of $4.3 million water system improvement program that includes, a 5 mile bored tunnel under the San Francisco Bay, and the 3.5 mile new Irvington tunnel, plus 20 mirco tunnels.