McNary Dam

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McNary Dam,

7,265 ft (2,214 m) long and 183 ft (56 m) high, on the Columbia River between Oregon and Washington, near Umatilla, Oreg.; built 1947–56 by the U.S. Corps of Engineers. Located at the head of the slack-water pool created by John Day Dam, it provides slack-water navigation 61 mi (98 km) upstream to the mouth of the Snake River; locks permit vessels to pass around the dam. McNary Dam is one of the largest hydroelectric power facilities in the United States.
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References in periodicals archive ?
After the completion of McNary Dam in the early 1950's, a more rigorous evaluation was made to estimate the effects of passage through turbines and spill on juvenile salmonids (Schoeneman et al., 1961).
From Bonneville Dam upstream to the Oregon-Washington border (upstream of McNary Dam), springer fishing remains open through May 6 or until the 1,000-Chinook harvest guideline for that section of the river is achieved.
"They feed heavily before winter," he says, noting that the night bite below McNary Dam is as good as it gets.
Lake Wallula, the 70 miles of waterway behind McNary Dam, is virtually untapped for walleyes; yet it's true trophy territory with monsters to 19 pounds caught every year.
It felt the eternal flow of the mighty Columbia River come to a halt following the construction of McNary Dam.
The site is close to BPA's transmission lines at McNary Dam, and it's also ideal from a pollution standpoint.
The program reduces the impacts of construction and operation of the McNary Dam on wildlife and habitats.
Slight decreases in counts at John Day Dam (rkm 348, mean = 1 091 000) and McNary Dam (rkm 470, mean = 724 000) indicate that some spawning occurs below these dams.
Over roughly the past fifty years, the construction of eleven large dams has significantly modified the mainstem of the Columbia.(22) Dams produce power, facilitate irrigation, control flooding, and aid shipping and navigation.(23) There are four dams in the 341 miles between the Pacific Ocean and the lower end of the Reach, where the McNary Dam is located.