San Vicente Pipeline

Emergency Storage Project

Client

San Diego County Water Authority (SCDWA),
California
USA

Contractor

Traylor / Shea Joint Venture
Consultant:
Beton- und Monierbau as Consultant for Reach 5 (East and West): Design, Technical Support, Supervision, Know-how Transfer, Senior SEM/NATM Tunnel Engineer and SEM/NATM Tunnel Specialist Operator on site

Project location

San Diego, California
USA

Start of construction

2006

End of construction

2006

Project total value

approx. 0.5 million €

Geology

Conglomerate below the water table, highly weathered granitic rock and hard granitic rock

Technical Data

• Know-how Transfer for Reach 5 (East and West)
• Total length of the project: 17,454.00 m
• Diameter excavated: 3.50 m – 4.00 m
• Execution by hard and soft rock TBM, drill and blast, excavator in soft ground, back
• Reach 5 (5 East and West)
o Total length of tunnel: 1,585.00 m
o Execution by drill and blast: 1,219.00 m
o Execution by excavator: 366.00 m
o Diameter excavated (5E): 3.60 m
o Diameter excavated (5W): 4.00 m