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The Hetch Hetchy Valley began as a V-shaped river canyon cut out by the ancestral Tuolumne River. About one million years ago, the extensive Sherwin glaciation widened, deepened and straightened river valleys along the western slope of the Sierra Nevada, including Hetch Hetchy, Yosemite Valley, and Kings Canyon farther to the south. [12]
The Pulgas Water Temple is a stone structure in Redwood City, California, United States, designed by architect William G. Merchant.It was erected by the San Francisco Water Department to commemorate the 1934 completion of the Hetch Hetchy Aqueduct and is located at the aqueduct's terminus; originally water flowed through a vault under the temple itself, but new requirements for treatment ...
Moccasin generates 427 million KWh per year, and is fed by Hetch Hetchy water through the Mountain Tunnel, [5] which provides a maximum head of 1,300 feet (400 m). [4] Water diverted at O'Shaughnessy Dam feeds into the Hetch Hetchy Aqueduct, which provides 85 percent of the municipal water for 2.4 million people in the San Francisco Bay Area. [50]
Due to the large elevation drop between Hetch Hetchy and the city, several hydroelectric power stations were constructed along the 167-mile (269 km) long Hetch Hetchy aqueduct. [3] Construction of the Moccasin Powerhouse began in 1921 and was completed on August 14, 1925. [4] The Powerhouse was designed by San Francisco Architect Henry A. Minton.
Prior to the construction of the Hetch Hetchy Aqueduct, half of San Francisco's water supply (6,000,000 US gallons (23,000,000 L; 5,000,000 imp gal) a day) [7] passed through the Sunol temple. The SVWC, including the temple, was purchased by San Francisco in 1930 for $40 million. [5]: 14
As the head of a predecessor to the Los Angeles Department of Water and Power, Mulholland designed and supervised the building of the Los Angeles Aqueduct, a 233-mile-long (375 km) system to move water from Owens Valley to the San Fernando Valley. The creation and operation of the aqueduct led to the disputes known as the California Water Wars.
Homes are used for employees who work on the Hetch Hetchy Water & Power system. Most buildings are painted the same color and homes in the community look similar as a result. There are no stores or gas stations. Construction on the original Moccasin Powerhouse, designed by San Francisco architect Henry A. Minton, was started in Fall 1921. The ...
In late 1908, the citizens of San Francisco approved the allocation of $600,000 in bonds to be used to purchase land and water rights in the Hetch Hetchy Valley to build a dam for a reservoir and aqueduct lines. They also approved a $45 million bond in 1910 to be issued for the construction of all the water infrastructure. [6]