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Footage shows how flash-floods blocked Iran’s major dam

Video shows how floods filled Iranian dam’s downstream with rocks in less than 20 minutes.

Iran’s Energy Ministry has released a video that shows how flash-floods that happened earlier this month near the capital Tehran washed down tons of rocks into the downstream of the city’s main reservoir, an incident that led to days of water shortage in the city.

The video released on Sunday showed layers of rocks piling up on the downstream of the Amir Kabir Dam, a large water reservoir located nearly 60 kilometers to the west of Tehran, and blocking its outlet in less than 20 minutes.

Experts say more than 1.6 million cubic meters of rock and earth were washed down the dam’s downstream, causing a massive blockage between the dam and water treatment facilities that supply water to Tehran.

Energy Ministry officials said the incident was a first in the history of Amir Kabir Dam, also known as Karaj dam, a reservoir built more than 60 years ago to ensure water supply to Tehran.

The incident caused nearly a week of water shortage in Tehran and in the nearby metropolitan city of Karaj.

Authorities said the operation to clear the rocks and earth blocking the dam's downstream was a very complicated one and took more than six days. They said it took three more days to restore full supply of water to households and businesses in Tehran on June 16.  


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