Tunnel Is First To Be Built Under San Francisco Bay

摘要

A new tunnel is part of the San Francisco Public Utilities Commission's $4.6-billion Water System Improvement Program. The program was designed to upgrade the aging Hetch Hetchy Water System, which brings water from the Hetch Hetchy Reservoir in Yosemite National Park to the 2.5 million people in the San Francisco Bay Area. Michels Tunneling, a division of Brownsville, Wis.-based Michels Corporation, and its joint-venture partners, Jay Dee Contractors Inc.