San Vicente final breakthrough
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September 21, 2009: Contractor Traylor/Shea JV achieves final breakthrough of the 11 mile x 13ft diameter (17.5km x 4m) San Vicente water aqueduct tunnel.

Perseverance paying off at San Vicente - TunnelTalk, Jan 09
San Vicente stumped by tough conglomerate - TunnelTalk, Sept 07


San Vicente final breakthrough

Paula Wallis reports for TunnelTalk
San Vicente, CA USA
San Vicente water aqueduct tunnel
11 mile x 13ft diameter (17.5km x 4m)
Contract Value:

$198.4 million
San Diego County Water Authority
Traylor/Shea JV
Construction Manager:

Parsons Engineering
Jacobs Associates
Excavation Methods:
Reach 1 - Robbins TBM
Reach 2 - CTS1 Open digger shield
Reach 3 - Drill+blast
Reach 4 - CTS2 Open digger shield
Reach 5 - Drill+blast, NATM, Robbins TBM
Reach 6 - Robbins TMB
Completion Date:
Tunneling activities began on June 2005 with completion expected in June 2010.