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The controversy over damming Hetch Hetchy became mired in the political issues of the day. The law authorizing the dam passed Congress on December 7, 1913. In 1923, the O'Shaughnessy Dam was completed on the Tuolumne River, flooding the entire valley under the Hetch Hetchy Reservoir. [2]
The most prominent figure in the Hetch Hetchy debate was the Sierra Club and its founder, John Muir. They opposed the Raker Act purely from an environmentalist standpoint. John Muir saw the Hetch Hetchy Valley as a prized natural resource and called it "one of Nature's rarest and most precious mountain temples". [7]
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]
Pinchot favored damming the valley as "the highest possible use which could be made of it". In contrast, Muir proclaimed, "Dam Hetch Hetchy! As well dam for water-tanks the people's cathedrals and churches, for no holier temple has ever been consecrated by the hearts of man". [47] Theodore Roosevelt and Muir, 1903
The dam was removed in the interest of fish passage and since the hydropower facilities had become obsolete. The dam was destroyed by dynamite at 6:35 PM on August 19, 1963, following two prior detonations that day which had failed to collapse the structure. [9] At the time, the dam was the largest ever to be removed, a record which stood for ...
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 ...
That October, with construction of the dam underway, San Francisco's City Engineer, Michael O'Shaughnessy, wrote negatively of Mulholland in a letter to John R. Freeman, an engineer who had assisted the city in its pursuit of permission to construct the Hetch Hetchy reservoir and water system in Yosemite National Park.
Despite opposition from John Muir and the Sierra Club, San Francisco ultimately prevailed with the passing of the Raker Act, which authorized construction of the O'Shaughnessy Dam on the Tuolumne River, and eventually turned the Hetch Hetchy Valley into the Hetch Hetchy Reservoir. By 1940, San Francisco and the two districts had become allies ...