A look inside our powerhouses
Lower Granite Dam powerhouse (left) is 656 feet in length and has six 135 megawatt generators. Construction began in 1965 and three turbine units were operational in 1975. Three more turbine units were installed and operational in 1979. Bonneville Dam first powerhouse (right).

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Photo by: Hydropower Intern Program |  VIRIN: 210315-A-A1408-007.JPG