Bonneville Dam Historic District - View this location on map Built in the 1930s by the Federal government to raise and divert the Columbia River to generate hydroelectric power, the dam represented a unique engineering challenge for a diversion/overflow dam; it was the first major structure built with a 'hydraulic drop' capable of developing more than 500,000 KW of electric power. Other structures in the district are the #1 Powerhouse, the Navigation Lock, the Fishways, and the Fish Hatchery. Columbia River , Bonneville, Oregon Historical

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