Alameda County: Hetch Hetchy Pipeline Construction at Newark Slough, Dumbarton, 1925
Alameda County: Hetch Hetchy Pipeline Construction at Newark Slough, Dumbarton, 1925 • This pipeline carries much of San Francisco’s water supply from a reservoir in the Sierras, and is submerged in the Bay parallel to the Dumbarton railroad bridge. Courtesy of the San Francisco Public Utilities Commission
Directed by precise voice commands, this 42-inch Hetch Hetchy submarine pipeline was dropped by workers into the Dumbarton slough. The pipeline runs above water, except for this portion of cast iron pipe that was sunk in a trench 25-feet deep into the mud and 75 feet below the water’s surface. A second pipeline traveling 34 miles around the southern end of the Bay was completed in 1973 as an insurance against water service interruption from an earthquake and other natural disasters.
Courtesy, San Francisco Public Utilities Commission
new-hetch-hetchy-Pipeline_M
Alameda County: Hetch Hetchy Pipeline Construction at Newark Slough, Dumbarton, 1925
Alameda County: Hetch Hetchy Pipeline Construction at Newark Slough, Dumbarton, 1925 • This pipeline carries much of San Francisco’s water supply from a reservoir in the Sierras, and is submerged in the Bay parallel to the Dumbarton railroad bridge. Courtesy of the San Francisco Public Utilities Commission
Directed by precise voice commands, this 42-inch Hetch Hetchy submarine pipeline was dropped by workers into the Dumbarton slough. The pipeline runs above water, except for this portion of cast iron pipe that was sunk in a trench 25-feet deep into the mud and 75 feet below the water’s surface. A second pipeline traveling 34 miles around the southern end of the Bay was completed in 1973 as an insurance against water service interruption from an earthquake and other natural disasters.
Courtesy, San Francisco Public Utilities Commission
new-hetch-hetchy-Pipeline_M