WaterBay Tunnel
A 5.5-mile immersed-tube rock tunnel carrying drinking water across the San Francisco Bay.
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Tunnel and underground projects, built and still standing.
Twenty-seven selected projects across four markets. Filter by market, or search for a project by name, location or service.
7 projects in Water
WaterBay Tunnel project details
WaterMountain Tunnel Improvements
Rehabilitation of a century-old bedrock water-supply tunnel serving a major California system.
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WaterNew Irvington Tunnel
A 3.6-mile steel-lined pressure tunnel and two large-diameter shafts in the Hayward Fault zone.
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WaterRondout-West Branch Bypass Tunnel
A deep rock pressure tunnel bypassing an ageing aqueduct, including a 1,100-foot drop shaft.
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WaterSan Vicente Tunnel
A 15-mile, high-pressure conveyance pipeline, a landmark in seismic-resilient design.
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WaterWillamette Water Supply Program
18 miles of high-pressure tunnel, plus shafts, reservoirs and a treatment-plant connection.
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WaterTerminal Hill Tunnel & Shaft
A deep-buried conveyance tunnel and cavern beneath an active water treatment campus.
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