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Brownlee Dam is a hydroelectric earth fill embankment dam in the western United States, on the Snake River along the Idaho-Oregon border (Washington County, Idaho in and Baker County in Oregon). In Hells Canyon at river mile 285, it impounds the Snake River in the 58-mile-long (93 km) Brownlee Reservoir .
Bliss Reservoir: 11,000 0.014 75 Idaho Power 1950 Brownlee Dam† Snake River: Earthfill 420 130 Brownlee Reservoir: 1,426,700 1.7598 585.4 Idaho Power: 1958 C. J. Strike Dam: Snake River: Earthfill 115 35 C. J. Strike Reservoir: 247,000 0.305 82.8 Idaho Power 1952 Cabinet Gorge Dam: Clark Fork: Concrete arch 111 34 Cabinet Gorge Reservoir ...
There are three man-made reservoirs on the Powder River: Phillips Reservoir (behind Mason Dam), Thief Valley Reservoir, and also the Powder arm of Brownlee Reservoir at the Oregon–Idaho border at the confluence of the Powder and Snake Rivers. In 1988, 11.7 miles (18.8 km) of the Powder River was designated Wild and Scenic.
At river mile 247, the dam impounds Hells Canyon Reservoir; its spillway elevation is 1,680 feet (512 m) above sea level. It is the third and final hydroelectric dam of the Hells Canyon Project, which includes Brownlee Dam (1959) and Oxbow Dam (1961), all built and operated by Idaho Power Company.
In 1955, the commission issued a license to the Idaho Power Company to build a three-dam complex in the canyon: The first of the three, Brownlee Dam, at river mile (RM) 285 or river kilometer (RK) 459, was finished in 1960. [11] Oxbow Dam, twelve miles (20 km) downstream, was finished in 1972. Hells Canyon Dam
Tetons and Snake River, Ansel Adams, 1942 This is a list of bridges and other crossings of the Snake River, from the Columbia River upstream to its sources. Headwaters of the North Fork are at Big Springs near Island Park, Idaho, while Jackson Lake is at the head of the South Fork.
Completed 64 years ago in 1961, [1] the dam is part of the Hells Canyon Project that also includes Hells Canyon Dam and Brownlee Dam, all built and operated by Idaho Power Company. The dam's powerhouse contains four generating units with a total nameplate capacity of 190 megawatts (250,000 hp).
Meanwhile, Idaho Power moved forward with the Oxbow and Hells Canyon Dams, though the question of fish passage still remained. From 1956 to 1964, returning adult salmon had been trapped at the base of Brownlee Dam (whose height made a fish ladder impractical) and released upstream.