The water level at which the Hoover Dam stops producing power is 950 feet (290 meters) above sea level.
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However, it is important to note that the Hoover Dam is a critical infrastructure, and shutting it down would be unlikely unless it's an emergency situation or for maintenance purposes. For more information on how the Hoover Dam works and the effects of it potentially shutting down, keep reading.
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.
Lake Mead's dead pool levels are 895 feet above sea level, but power generation may cease at 950 feet, according to the National Parks service. Lake Mead's water levels have been forecast to drop as low as 992 feet by the end of July 2024, with experts predicting that dead pool may be reached in the next few years.
Lake Powell and Lake Mead are unlikely to refill for another 50 years - and would need SIX consecutive years of deadly atmospheric rivers to replenish.
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.
What happens if Lake Mead dries up forever? 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.
The water elevation in Lake Mead is around 1,040 feet above sea level. At 950 feet, Hoover Dam will be at its lowest point to be able produce power, according to the US Bureau of Reclamation.
Downriver towns and major cities would see the most damage, in the event of the dam's physical collapse. Water flows would engulf many towns and growing cities around Mohave county, including Laughlin, Nevada; Needles, California; Lake Havasu, Arizona; and even as far south as Yuma, Arizona, and San Luis Rey, Colorado.
Powell's physical elevation is projected to be 3,574.30 feet on December 31, 2023. With intervening flows between Lake Powell and Lake Mead of 1.32 maf in CY 2023, Lake Mead's physical elevation is projected to be 1,065.42 feet on December 31, 2023.
It supplies about 25 million people with water in Boulder City, Las Vegas, North Las Vegas, and Henderson, all Nevada's cities. In addition to cutting off water supplies for homes and businesses in the area, a dam collapse would destroy all the irrigation water supplies for farms in the Imperial Valley.
According to the LVVWD, the first straw, or intake one, will no longer work when the lake level falls below 1,050 feet (Lake Mead's water level is measured at an altitude above sea level).
Record snowfall in the West wasn't enough to alleviate drought impacting Lake Mead. The record snowfall in the West wasn't enough to permanently alter the course of the drought impacting Lake Mead. FOX Weather's Robert Ray reports on the ongoing water issues and the Colorado River.
Under the Probable Minimum scenario, Lake Powell's physical elevation is projected to be 3,572.23 feet on December 31, 2023. With intervening flows between Lake Powell and Lake Mead of 1.31 maf in calendar year (CY) 2023, Lake Mead's physical elevation is projected to be 1,065.01 feet on December 31, 2023.