Lake Mead and Lake Powell, major reservoirs along the river, could reach “dead pool,” with levels so low that water can't flow out of those dams. That could turn off river supplies to cities like Las Vegas, Los Angeles, and Phoenix.
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Although a physical collapse is not likely, officials believe that Lake Mead's water levels could reach what is known as the dead pool in just a few years. If this were to happen, it would mean no hydropower, no water supply, and all operations dependent on the dam would cease.
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.
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.
But while Lake Mead has filled up slightly since its low point of July 2022, the Bureau of Reclamation anticipates that the water levels will start to decline again come spring. A Bureau of Reclamation study published in January predicted that Lake Mead could reach a new all-time low in 2023.
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.
The Hoover Dam relies on a steady water supply from Lake Mead. Without enough water, the dam would not be able to generate power. This would have ripple effects on the power grid and the economy, as the dam provides power to several states in the southwest United States.
There are many places to swim in the bright blue waters of Lake Mead and Lake Mohave. Be aware that there are no lifeguards in the park. Always wear a life jacket.
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.
If the Hoover Dam shuts down, it will have a ripple effect in the states of Nevada, Arizona, and California. There will be less water to go around, power will have to come from less clean sources, and all industries will be impacted some way or another.
“When we see even significant rainfall in the Las Vegas Valley and the benefit to Lake Mead from that rainfall and all of that runoff, you are looking at, at best, tenths of an inch in changes.
This could be catastrophic for the southwestern U.S as we know it, as the Hoover Dam, which forms the lake, is also integral to irrigating water throughout the region. Lake Mead's water is not just used for consumption, but for agriculture, and hydropower. If water runs out, the Hoover Dam could stop functioning.
“While the amount of precipitation received in the lower basin and from tributary inflows helps, the greatest source of water for Lake Mead is still snow melt and flows from the upper basin.”
Lake Mead expected to have gained 20 feet of water by end of 2023. By the end of the year, the water level at Lake Mead is expected to be at least 20 feet higher than it was in January, according to a Bureau of Reclamation forecast released this week.