Hoover Dam's construction began in 1931 and was completed in 1936, remarkably ahead of schedule during the Great Depression.

Construction Timeline

Work officially started after preliminary site preparations in 1930, with the first concrete poured on June 6, 1933. The dam reached completion with the final concrete placement on May 29, 1935, followed by President Franklin D. Roosevelt's dedication on September 30, 1935—over a year early and under budget at $49 million. Full hydroelectric operations ramped up into 1936-1937.

Engineering Marvel Details

  • Scale : At 726 feet high and 1,244 feet long, it was the world's tallest dam and largest concrete structure upon completion, using over 3.25 million cubic yards of concrete.
  • Workforce : Peaked at 5,251 daily workers from tens of thousands who applied, enduring extreme desert heat up to 125°F and risky conditions like river diversions via cofferdams.
  • Purpose : Built to control Colorado River floods, provide irrigation/drinking water to southwestern states, and generate hydroelectric power for millions.

Historical Context

Imagine the desperation of the era: post-1929 stock crash, jobless Americans flocked to Black Canyon on the Nevada-Arizona border, creating makeshift "Ragtown" camps before Boulder City housed families. Initially called Boulder Dam, it was renamed for President Herbert Hoover, who championed the Colorado River Compact in 1929. This feat not only tamed a wild river but symbolized American grit, earning status as a National Historic Landmark and one of the Seven Modern Civil Engineering Wonders.

TL;DR : Built 1931-1936, dedicated 1935—two years early, powering the Southwest ever since.

Information gathered from public forums or data available on the internet and portrayed here.