Hitachi EPBM for San Francisco Bay Tunnel

An Hitachi Zosen EPBM is ordered by the Michels/Jay Dee/Coluccio JV for the first bored tunnel under the San Francisco Bay in northern California. The 4.56m diameter machine will excavate the 5-mile (8km) long water supply tunnel under the Bay as part of the $4.2 billion Water System Improvement Program for the San Francisco Public Utilities Commission. The alignment under the South Bay, south of the Dumbarton Bridge, will reach depths of 110ft (33m) as it progresses from a working shaft at Menlo Park on the Peninsula to another at Newark on the east side of the Bay. Read more...