WaterBay Tunnel
A 5.5-mile immersed-tube rock tunnel carrying drinking water across the San Francisco Bay.
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Mountain Tunnel Improvements
Rehabilitation of a century-old bedrock water-supply tunnel serving a major California system.
Condition assessment, structural repair and construction management for a 100-year-old water tunnel.
A phased rehabilitation approach allowed the supply to remain in service while internal works progressed, with continuous monitoring of the host rock and lining.
Scope of work
- Tunnel Inspection & Rehabilitation
- Construction Management
- Structural Engineering
Project facts
- Age
- 100+ years
- Supply
- Maintained
- Method
- Internal works
- Completion
- 2021
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