A new seismically resistant tunnel came into service last week, connecting Hetch Hetchy and East Bay water supplies with customers in the San Francisco area. Officials were on hand to celebrate the completion of the project.The celebration comes on the anniversary of the 1989 Loma Prieta earthquake, which served as a wakeup call for the region.“The new Bay Tunnel will ensure that we have reliable access to Hetch Hetchy water at all times, particularly within 24 hours of a major earthquake,” says SFPUC General Manager Harlan L. Kelly Jr.The Bay Tunnel is part of the multibillion-dollar Water System Improvement Program,
