WaterBay Tunnel
A 5.5-mile immersed-tube rock tunnel carrying drinking water across the San Francisco Bay.

A 15-mile, high-pressure conveyance pipeline, a landmark in seismic-resilient design.
Seismic design, geotechnical engineering and construction phase services for an aqueduct built to remain functional after a major earthquake.
The pipeline incorporates flexible joints, isolated blocks and carefully graded backfill — an approach that has since influenced water-conveyance design across the western United States.
