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       Hetch 
      Hetchy 
      About twenty miles northwest of the Yosemite Valley is the remnant of a 
      similar but smaller valley known as the Hetch Hetchy (from Miwok: 
      "grass-seed valley" or "acorn valley"). Before 1914 the waters of the 
      Tuolumne River raced through the valley floor and like Yosemite waterfalls 
      cascaded over magnificent granite cliffs. However, the people of San 
      Francisco needed water and petitioned to build a dam that would flood the 
      valley offering them a reservoir. When a plan for the O'Shaughnessy dam 
      was announced, John Muir and other conservationists objected. Muir said 
      that the flooding of the Hetch Hetchy would be like destroying one of 
      nature's great cathedrals. In spite of Muir's objections, Congress in 1913 
      approved the building of the dam. Muir was greatly saddened when he heard 
      the news. Brokenhearted, he died a few months later. Construction of the 
      dam began in 1914 and was completed within nine years. An aqueduct 
      carrying water from the reservoir to San Francisco was in full operation 
      by 1934. Today the Hetch Hetchy provides San Franciscans with about 85 
      percent of their water. 
       
      Photos of Hetch Hetchy 
      mouse click on any of the thumbnail images below for 
      an enlargement 
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