Bonneville Dam
(BAHN-uh-vil), one of the major dams on the
Columbia R. where it passes through the Cascade Mts., on state line of
Oregon and Wash.; 2,690 ft/820 m long,
197 ft/60 m high. Built (1933-1943) by the
U.S. Corps of Engineers; one of the largest hydroelectric projects
undertaken under the New Deal. Its reservoir extends
c.40 mi/64 km to the Dalles Dam,
1 mi/1.6 km wide. Used for navigation, flood
control, and power production. Locks permit barges to pass around the
dam. Bonneville Power Administration contracted for power from 5
nuclear plants, to be built by Wash. Public Power Supply System
(WPPSS), which were never finished. New larger locks (1994) improve
passage of barges. Fish (salmon) passage problems going
downstream.
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