- Role: Tunnel Design Lead; Design Build for Contractor
- Client: STV Inc.
- Construction Cost: $1.27 Billion
- Technology: EPBM
- Geology: Soft Ground
- Dimensions: 20.3 ft ID (6.1 m)
- Length: 2.6 mi (4.2 km)
- Depth: 50-70 ft (15-21 m)
Project Elements:
- Twin-bore tunnel in dense urban environment
- Santa Monica fault – 700 ft wide at 63⁰
- Undercrossing critical highway and water supply infrastructure
- Undercrossing Westfield Shopping Mall
- Multiple segmental lining designs, including regular, fault crossing special, cross passage special
- Break-in and out of stations
- Seismic connection between station and tunnel
