Photo 1 of 5

View all

Landmark tunnel under Bay breaks ground
The $347 million, 5-mile-long Bay Tunnel will stretch from Menlo Park to Newark at depths of up to 100 feet. It is designed to increase the safety of the water supply from the Hetch Hetchy reservoir. Image courtesy of the San Francisco Public Utilities Commission.

© 2017 Palo Alto Online.
All rights reserved.