| The Columbia Encyclopedia, Sixth Edition. 2001-07. |
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| John Day Dam |
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| 219 ft (67 m) high and 5,640 ft (1,719 m) long, on the Columbia River between Oregon and Wash.; built between 1959 and 1968 by the U.S. Army Corps of Engineers. It is an extremely large generator of hydroelectric power. The dam’s reservoir regulates navigation upstream; locks provide ship passage from The Dalles Dam reservoir to McNary Dam (see Columbia basin project). |
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| | | The Columbia Encyclopedia, Sixth Edition. Copyright © 2007 Columbia University Press. |
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