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O'Shaughnessy Dam is a 430-foot-high (131 m) 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 (260 km) east of San Francisco . [ 6 ]
As completed, O'Shaughnessy Dam is 910 feet (280 m) long, spanning the valley at its narrow outlet. [2] The dam contains 675,000 cu yd (516,000 m 3 ) of concrete. The Hetch Hetchy Reservoir created by the dam has a capacity of 360,400 acre⋅ft (0.4445 km 3 ), with a maximum area of 1,972 acres (798 ha) and a maximum depth of 306 feet (93 m). [ 2 ]
The National Park Service says the “Peak Hours Plus” reservation system is similar to what was in place in 2022. Visiting Yosemite in 2024? Reservations needed again for national park in ...
Yosemite National Park's El Capitan and Cathedral Rocks with the Merced River on Feb. 1, 2021. (Carolyn Cole / Los Angeles Times)
Map of California's interconnected water system, including all eleven reservoirs over 1,000,000 acre-feet (1.2 km 3) as well as selected smaller ones.. This is a list of the largest reservoirs, or man-made lakes, in the U.S. state of California.
For a rare, if not lucky, few days a year, Yosemite National Park’s famed El Capitan granite cliff converts into what looks like an active volcano jutting 3,000 feet above the valley floor.
Lake Eleanor Dam (National ID # CA00121) stands as a concrete multiple arch dam with a height of 68 feet (21 m) and a length of 1,260 feet (380 m). This first stage of the Hetch Hetchy project was built for year-round hydroelectric power generation, which was then sold to help finance construction of the larger O'Shaughnessy Dam , completed in ...
The popular Sierra Nevada spot is adding a reservation system to “help manage congestion and provide a quality visitor experience.” Want to visit Yosemite National Park this summer? You might ...