Hoover Dam Begins Powering Los Angeles

Context

The Boulder Canyon Project Act of 1928 authorized construction of a massive dam on the Colorado River to manage floods, store water for irrigation and municipal use, and generate electricity. Los Angeles had outgrown its local power resources and, through its Department of Water and Power, secured a large share of the dam's output while financing the transmission lines needed to deliver it across deserts and mountains. The onset of the Great Depression shifted federal priorities toward large-scale public works that could create jobs and support economic recovery.

What Happened

By early 1936 the dam's concrete structure was essentially finished, and its powerhouse began producing electricity on the Nevada side. On October 9, Los Angeles Department of Water and Power officials staged a ceremony at the Civic Center where Elisabeth Scattergood, daughter of the agency's chief engineer and general manager E.F. Scattergood, pressed a key that activated the flow of power and lit a large electric arc. That evening tens of thousands of residents lined Broadway for a parade as streetlights and buildings illuminated with the new supply.

Aftermath

Los Angeles immediately incorporated the dam's power into its grid, easing shortages and supporting expanding residential and industrial demand. The event highlighted the success of coordinated federal, state, and municipal efforts to develop the Colorado River basin.

Legacy

The arrival of Hoover Dam power exemplified the New Deal emphasis on multipurpose water projects that combined flood control, irrigation, and electricity generation. The reliable supply helped sustain Southern California's wartime manufacturing and postwar suburban growth, while establishing precedents for federal financing and long-term power contracts that shaped later dams across the West.