WaterBay Tunnel
A 5.5-mile immersed-tube rock tunnel carrying drinking water across the San Francisco Bay.
View project
Willamette Water Supply Program
18 miles of high-pressure tunnel, plus shafts, reservoirs and a treatment-plant connection.
A multi-phase programme delivering the backbone raw-water supply for the Portland region.
Our teams contributed tunnel and shaft design, geology and geotechnical engineering, and long-term construction management through to commissioning.
Scope of work
- Tunnels & Underground Engineering
- Advisory Consulting
- Construction Management
Project facts
- Tunnel
- 18 miles
- Phases
- 3
- Raw water
- Regional
- Completion
- 2003
More water projects
WaterBay Tunnel project details
WaterMountain Tunnel Improvements
Rehabilitation of a century-old bedrock water-supply tunnel serving a major California system.
View project
WaterNew Irvington Tunnel
A 3.6-mile steel-lined pressure tunnel and two large-diameter shafts in the Hayward Fault zone.
View project
WaterRondout-West Branch Bypass Tunnel
A deep rock pressure tunnel bypassing an ageing aqueduct, including a 1,100-foot drop shaft.
View project
WaterSan Vicente Tunnel
A 15-mile, high-pressure conveyance pipeline, a landmark in seismic-resilient design.
View project
WaterTerminal Hill Tunnel & Shaft
A deep-buried conveyance tunnel and cavern beneath an active water treatment campus.
View project
Planning something underground?
Every project starts with a conversation about your ground, your constraints, and your programme.