Chief Joseph Dam is a 5,962 foot (1,817.2 m) long hydroelectric dam spanning the Columbia River, 1.5 miles (2.4 km) upriver from Bridgeport, Washington, USA.
Construction began in 1949, with the main dam and intake structure completed in 1955. Installation of the initial generating units was completed in 1958. Eleven additional turbines were installed between 1973 and 1979, and the dam and lake were raised 10 feet (3 m), boosting the capacity 2,620 MW, making Chief Joseph Dam the second largest hydropower producer in the United States.
About 2.2 million cubic yards of reinforced concrete was used to construct Chief Joseph Dam. That's enough concrete to build a two-lane highway between the dam and Salt Lake City, Utah.
Chief Joseph Dam has 27 main unit penstocks - one to deliver water to each generator. Each of these penstocks carries enough water to fill an Olympic - size swimming pool in seven seconds.
Chief Joseph Dam also has two small penstocks that supply water for two station service generators. The station service generators supply the power used to operate the dam.
There are 4.5 miles of galleries (passageways) in the dam.
The value of the electricity produced at Chief Joseph Dam is about $450 million annually.
Chief Joseph Dam has the nation's longest straight-line powerhouse. At 2039 feet, it's nearly one half mile long.
Chief Joseph Dam is the nation's second leading producer of hydropower. #Bridgeport #Columbia_River #hydro