Seventeen Francis turbines spin beneath the Colorado River, each weighing 185 tons and capable of generating 133,000 kilowatts.
Commissioned in 1936, the Hoover Dam power plant was the largest hydroelectric facility in the Western Hemisphere for four decades, supplying energy to Los Angeles, Las Vegas, and Phoenix through a transmission grid that stretched 266 miles at its longest reach. The Bureau of Reclamation designed the plant to run continuously, and it has done so for ninety years, with only scheduled maintenance halting the turbines. The generator floor sits 650 feet below the crest of the dam, carved into the canyon bedrock and cooled by ventilation shafts that draw air from the river corridor.
The power plant remains a working facility, producing an average of four billion kilowatt-hours annually and supplying electricity to 1.3 million customers across Nevada, Arizona, and California. Guided access reveals the scale of the turbines, the copper windings of the generators, and the intake towers that funnel water through thirty-foot penstocks at 85 miles per hour. The observation deck overlooks the transformer yard and the Colorado River as it exits the dam, a view that frames the engineering relationship between the structure and the landscape it controls. Visitors descend through tunnels drilled during the original construction, passing junctions where rail cars once carried concrete and steel into the canyon walls.
Hoover Dam power plant tour tickets grant entry to the generator floor, the intake tunnels, and the visitor center, where scale models and archival film document the construction sequence from 1931 to 1936. The Bureau of Reclamation restricts access to ensure operational security, and reservations are required year-round. VIP small-group tours include extended time on the generator floor and access to areas not open to general admission. The dam remains one of the most-visited engineering landmarks in the United States, drawing more than seven million people annually to the site where the Colorado River was first harnessed at industrial scale.
10 hr
