WaterBay Tunnel
A 5.5-mile immersed-tube rock tunnel carrying drinking water across the San Francisco Bay.
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New Irvington Tunnel
A 3.6-mile steel-lined pressure tunnel and two large-diameter shafts in the Hayward Fault zone.
Design and construction phase services for a critical regional water conveyance tunnel.
Crossing the active Hayward Fault demanded exceptional seismic resilience: flexible joints, deformable lining segments and shafts designed for a full-life serviceability target far beyond code minimums.
Scope of work
- Tunnels & Underground Engineering
- Geotechnical Engineering
- Structural Engineering
Project facts
- Length
- 3.6 miles
- Shafts
- 2
- Seismic
- Fault crossing
- Completion
- 2015
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