O'Shaughnessy Dam is a 430-foot high concrete arch-gravity dam in Tuolumne County, California, United States. It impounds the Tuolumne River, forming the Hetch Hetchy Reservoir at the lower end of Hetch Hetchy Valley in Yosemite National Park, about 160 miles east of San Francisco. The dam and reservoir are the source for the Hetch Hetchy Aqueduct, which provides water for over two million people in San Francisco and other municipalities of the west Bay Area.
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Wikipedia https://en.wikipedia.org/wiki/O'Shaughnessy_Dam_(California)
Address O'Shaughnessy Dam Rd, 95321, United States
Coordinates 37°56'51.247" N -119°47'17.629" E
