The Dalles Lock and Dam is 192 miles upriver from the mouth of the Columbia River and two miles east of the city of The Dalles, Ore.
Construction of The Dalles Lock and Dam started in 1952; the project was completed in 1957 at a cost of $299 million. Since its construction, the dam has generated more than 9.2 billion kilowatt hours of electricity and passed up to 10 million tons of river cargo annually. The authorized primary project purposes are navigation and power generation.
The project consists of a concrete structure with a navigation lock, spillway, gated powerhouse and fish passage facilities. Various recreational facilities are provided along Lake Celilo, the 24-mile-long impoundment behind the dam.
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