Bonneville Dam
"The United States Army Corps of Engineers completed Bonneville Dam in 1938."
Durbin 18
Oregon State Archives: A 1940 Journey Across Oregon
BONNEVILLE, 150 m [West of Hwy. 730 Junction]. (50 alt., 800 pop.), is at Bonneville Dam, begun by the Federal Government in 1933 and finished in 1938. The dam, designed by United States Army engineers, raised the level of water to a point four miles above The Dalles. Many of the river's beauty spots and historic sites were submerged by this impounding of water. The Cascades and much of the shore line disappeared beneath the rising waters of the great reservoir.
The dam spans the Columbia River from Oregon to Washington, a distance of 1,100 feet. Bradford Island, an old Indian burial ground separating the river's two channels, is at the center of the mammoth barrier. There is a single lift lock, 75 feet wide and 500 feet long, near the Oregon shore; a power plant with two completed units, each of 43,000 kilowatts capacity, and with foundation for four additional units; a gate control spillway dam creating a head of 67 feet at low water; and fishways designed to permit salmon to ascend the Columbia to their spawning grounds on its upper tributaries. The slack water lake formed above the dam creates a 30-foot channel between Bonneville and The Dalles, a distance of 44 miles. With the deepening of the Columbia between Vancouver, Washington and the dam, to a depth of 27 feet, the river will be navigable to sea going craft for 176 miles inland. The final cost of the project, including its ten hydroelectric units with a capacity of more than a half million horsepower, will be more than $70,000,000.
http://arcweb.sos.state.or.us/pages/exhibits/across/eaglecr.html
