What caused the landslide at the Vajont Dam disaster 1963?

An updraft of air, rocks, and water climbed the canyon walls to around 850 feet above the reservoir. Waves of water reached greater than 330 feet above the dam crest. Approximately 20,000 acre-feet of water went over the dam, creating a flood depth at the mouth of Vajont River of about 230 feet, one mile downstream.



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A wave of water washed above the lake to Casso and Erto, communities above the reservoir, where the air blast and water destroyed buildings and caused at least 158 fatalities. Five downstream towns were destroyed including Longarone, Pirago, Rivalta, Villanova, and Fae.

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The failure of the South Fork Dam, which affected Johnstown, is currently regarded as the worst dam failure in U.S. history. About eight miles to the east of Johnstown, Pennsylvania, was where the South Fork Dam, a rock and earthen dam, was built.

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The worst dam failure in the United States was the Johnstown flood of 1889. The failure of the South Fork Dam, which affected Johnstown, is currently regarded as the worst dam failure in U.S. history.

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Francis Dam in the San Francisquito Canyon. Nearby these haunting reminders, there is a sign: “On March 12, 1928, just before midnight, it collapsed and sent over twelve billion gallons of water roaring down the valley of the Santa Clara River. Over 450 lives were lost in this, one of California's greatest disasters.”

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Banqiao Dam Failure (China, 1975) The Banqiao Dam failure is considered the deadliest dam disaster in history. Heavy rainfall caused the dam to collapse, leading to a catastrophic flood. The estimated death toll ranges from 26,000 to 171,000, with millions of people affected.

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The dam itself was largely unaffected by the landslide and resulting wave. Although the government and SADE were quick to state that it was a natural disaster, several employees were eventually sentenced for negligence and manslaughter. The dam still stands, though the reservoir has never been refilled.

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Chinese officials staged a sudden about-face, acknowledging for the first time that the massive hydroelectric dam, sandwiched between breathtaking cliffs on the Yangtze River in central China, may be triggering landslides, altering entire ecosystems and causing other serious environmental problems—and, by extension, ...

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After several days of heavy rainfall in May 1889, the South Fork Dam 14 miles upstream of Johnstown in Pennsylvania failed catastrophically. The resulting flood of 1889 killed more than 2,200 people and caused US$17m damage. It is still the worst dam disaster in US history.

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The January 5, 2023 spillway failure of the North Fork Dam on Pacheco Creek is an unfortunate sign that California has much work to do to ensure dam safety. The North Fork Dam has been a focus of the California Department of Water Resources (DWR) Division of Safety of Dams (DSOD) since at least 2017.

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The largest hydroelectric plant in the United States is at Grand Coulee Dam. Its three powerplants have a capacity of 6,809 MW, and it generates, on average, about 21 billion KWh, while Hoover Dam's powerplant has a capacity of 2,074 MW and generates approximately 4 billion KWh a year.

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A dam is defined as a barrier constructed to hold back water and raise its level, forming a reservoir used to generate electricity or as a water supply. The oldest dam in America is Old Oaken Bucket Pond Dam. It was built in 1640 and is located in Scituate, Massachusetts.

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