Hetch Hetchy Valley

The Columbia Encyclopedia, 6th ed. | 2011 | 357 words | Copyright

Hetch Hetchy Valley in Yosemite National Park , central Calif., on the Tuolumne River. It once rivaled Yosemite Valley in beauty and grandeur. O'Shaughnessy Dam (completed 1923; enl. 1938) turned the valley into a lake c.9 mi (14 km) long, which is used for generating power and for supplying water to San Francisco by an aqueduct 156 mi (251 km) long.

Cite this article
Pick a style below, and copy the text for your bibliography.

MLA
Chicago
APA

"Hetch Hetchy Valley." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

"Hetch Hetchy Valley." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1E1-HetchHet.html

"Hetch Hetchy Valley." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-HetchHet.html

Learn more about citation styles