Hoover Dam

The face of the Hoover Dam, as seen from the Nevada side

The Hoover Dam is a concrete gravity-arch dam in the Black Canyon, on the Colorado River border, between Arizona and Nevada. The dam, located some 48 kilometres southeast of Las Vegas, is named after President Herbert Hoover. The Hoover Dam was built by Six Companies, Inc, under Frank Crowe, and was completed two years ahead of schedule. The walls of the canyon, as well as the gravity of the dam, hold back the waters of Lake Mead, the reservoir created behind the dam.

Built during the Great Depression, over 100 workers died during the construction of the four diversion tunnels and dam, and many of the workers' wives and children also died from the extreme heat and lack of sanitation they had to endure in the squalid camps like Ragtown which quickly grew around the dam site. Six Companies were contracted to build a new town for construction workers, to be called Boulder City, but Frank Crowe, preferred to concentate efforts on the tunnels and dam. Crowe was fearful of winter floods and the financial penalties he would suffer if the project fell behind schedule. However, discontent with Ragtown and the dangerous working conditions led to a strike on August 8 1931. Six Companies responded by sending in strike-breakers with guns and clubs, and the strike was soon quashed. But the discontent prompted the authorities to speed up the construction of Boulder City, and by the spring of 1932 Ragtown had been deserted. [1].

The dam was designed to control floods; to store water for irrigation, municipal, and industrial use; and to generate hydroelectric power. Generators at the Dam's Hoover Powerplant began to transmit electricity from the Colorado River a distance of 266 miles to Los Angeles, California on October 9, 1936. Additional generating units were added through 1961. The seventeen main turbines at this powerhouse generate 2,074 megawatts of hydroelectric power. The dam and powerplant are operated by the United States Department of the Interior's Bureau of Reclamation.

In addition its economic and engineering renown, Hoover Dam is accounted a masterpiece of Art Deco design.

Statistics

• Construction period: April 20, 1931 - March 1, 1936
• Construction cost: $165 million
• Dam Height: 726.4 ft (221.4 m), highest in the Western Hemisphere.
• Dam Thickness: 660 ft at its base; 45 ft thick at its crest.
• Concrete: 4.36 million yards³ (3.64 million m³)
• Traffic across the dam: 13,000 to 16,000 people each day, according to the Federal Highway Administration
• Lake Mead surface area: 247 square miles (637 km²), backing up 110 miles behind the dam.
• Lake Mead water volume: approximately 46,000,000,000 yd³ (35,200,000,000 m³), or 28.5 million acre-feet; nearly 2 years of average Colorado River flow; largest man-made reservoir in the USA.
• Lake Mead shoreline: 550 miles
• With 8 to 10 million visitors each year, the Lake Mead National Recreation Area is the 5th busiest national park in the USA, according to the National Park Service.

External links

• Hoover Dam's official website
• BBC - Hoover Dam, industrial and social history
• Hoover Dam page