Has the Hoover Dam paid itself off?

The sale of electrical power generated by the dam paid back its construction cost, with interest, by 1987. Today the Hoover Dam controls the flooding of the Colorado River, irrigates to over 1,500,000 acres of land, and provides water to over 16,000,000 people.



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The Dam Future While the dam is expected to last for centuries, engineers predict the structure could last for more than 10,000 years, surpassing most remnants of human civilization if humans were to disappear from the earth.

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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.

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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.

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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.

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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. The WY 2023 unregulated inflow into Lake Powell in the August Probable Maximum inflow scenario is 13.75 maf, or 143% of average.

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Lake Elevation Lake Mead began filling in late 1934 and the average daily surface elevations from 1 February 1935, when elevation data began to be collected, through 2009 are shown in Figure 2. The reservoir did not reach 1,045 ft above msl, the elevation of the upper outlet, until 1 May 1937.

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