Hoover Dam was constructed between 1931 and 1936 in Black Canyon on the Colorado River, on the border between the U.S. states of Nevada and Arizona.

Why was Hoover Dam built?

The dam was built for three primary reasons:

Flood control

Before the dam existed, the Colorado River flowed unpredictably through the Rocky Mountains. Seasonal snowmelt caused recurring floods that often devastated downstream regions. Controlling these floods was the highest priority.

Water supply

Prior to construction, downstream farmers received abundant water only during the spring snowmelt. By late summer, water levels dropped significantly, leading to shortages. The dam made it possible to regulate water flow throughout the year, providing a more reliable supply across all seasons.

Power generation

The third objective was hydroelectric power. Today, Hoover Dam still generates enough electricity each year to serve over one million people in Nevada, Arizona, and California.

The construction of the dam led to the creation of Lake Mead, which became the largest reservoir in the United States by water capacity.

Current conditions

Today, Lake Mead is steadily shrinking. Prolonged and severe drought in the American Southwest, combined with high regional water consumption, has reduced inflow and disrupted natural replenishment cycles. Water is being used faster than it can be replaced.

The photographs in this gallery focus on key aspects of Hoover Dam—from the surrounding landscapes on both the Nevada and Arizona sides to the dam’s principal structures.

The final five photographs, sourced from the public domain, are not my own. They are included to help illustrate how the dam operates and to provide visual context for the visible effects of drought in the U.S. Southwest.

© 2024 Gaetano Antonini