What would happen if the Hoover Dam broke?

If the Hoover Dam ever breaks, the entire region downriver would suffer from immense flooding, a loss of available water for consumption and irrigation would create a humanitarian crisis, and the region would lose access to some power in the short term.



People Also Ask

That water would likely cover an area of 10 million acres (4 million hectares) 1 foot (30 centimeters) deep. To put that area in perspective, the entire state of New Jersey is 9 million acres (3.6 million hectares). Downriver towns and major cities would see the most damage, in the event of the dam's physical collapse.

MORE DETAILS

If Lake Mead were to run out of water, the Hoover Dam would no longer be able to generate power or provide water to surrounding cities and farms. The Colorado River would essentially stop flowing, and the Southwest would be in a major water crisis.

MORE DETAILS

Key Points. Lake Mead has dropped by 70% due to droughts in the West and it will take many years to refill again, naturally. The reservoir is vitally important to millions of people as a source of water, electricity, and recreation.

MORE DETAILS

Electricity would not just be the only thing lost. Without Lake Mead, Las Vegas would lose access to 90 percent of its water sources. If Lake Mead were to reach dead pool, it would technically still be able to supply drinking water to Las Vegas. But there will not be enough water for agricultural activities.

MORE DETAILS

Officials have warned that dead pool could be reached by 2025, if the lake continues drying up at the rate it is currently.

MORE DETAILS

Mead reaches dead pool at 895 feet. If Lake Powell reaches dead pool, the US Bureau of Reclamation—which declined our interview requests—would be unable to meet its obligation to deliver water downstream to Lake Mead. In which case, 40 million people would be affected.

MORE DETAILS

Hoover Dam, spanning the Arizona-Nevada border about 30 miles southeast of Las Vegas, is the most-visited dam in the world, counting some 7 million tourists a year.

MORE DETAILS

D.J. Jenner, the owner of Las Vegas Scuba, who has been observing the lake for years, told Impact that the water levels have gone down roughly 40 feet since he started his business. There's still plenty of water out here for people to come out and enjoy the lake, but it is going down pretty quickly, he said.

MORE DETAILS

Many people who take the tour here at Hoover Dam want to know when they will get to see the water go over the top of the dam. Well, the water has never gone over the top of the dam and probably never will.

MORE DETAILS

To divert the Colorado River's flow around the Hoover Dam construction site, four 56-foot-diameter tunnels were driven through the walls of Black Canyon, two on the Nevada side and two on the Arizona side. Their combined length was nearly 16,000 feet (more than three miles).

MORE DETAILS