The wall of a major dam in a part of southern Ukraine that Moscow controls collapsed Tuesday, triggering floods, endangering Europe’s largest nuclear power plant and threatening drinking water supplies as both sides in the war rushed to evacuate residents and blamed each other for the emergency.
Ukraine accused Russian forces of blowing up the Kakhovka dam and hydroelectric power station on the Dnieper River, while Russian officials blamed Ukrainian military strikes in the contested area. It was not possible to verify the claims.
In this image taken from video released by the Ukrainian Presidential Office, water runs through a breakthrough in the Kakhovka dam in Kakhovka, Ukraine, Tuesday, June 6, 2023. Ukraine on Tuesday accused Russian forces of blowing up the major dam and hydroelectric power station in a part of southern Ukraine they control, threatening a massive flood that could displace hundreds of thousands of people, and ordered residents downriver to evacuate.
Ukrainian Presidential Office via AP
The potentially far-reaching environmental and social consequences of the disaster quickly became clear as homes, streets and businesses flooded downstream and emergency crews began evacuations; officials raced to check cooling systems at the Zaporizhzhia Nuclear Power Plant; and authorities expressed concern about supplies of drinking water to the south in Crimea, which Russia illegally annexed in 2014.
The dam break added a stunning new dimension to Russia’s ongoing war in Ukraine, now in its 16th month. Ukrainian forces were widely seen to be moving forward with a long-anticipated counteroffensive in patches along more than 1,000 kilometers (621 miles) of frontline in the east and south of Ukraine.
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It was not immediately clear whether either side benefits from the damage to the dam, since both Russian-controlled and Ukrainian-held lands are at risk of flooding. The damage could also hinder Ukraine’s counteroffensive in the south and distract its government, while at the same time Russia depends on the dam to supply water to Crimea.
Patricia Lewis, director of the International Security Program at Chatham House think tank in London, said apportioning blame is difficult but “there are all sorts of reasons why Russia would do this.”
“There were reports (last fall) of Russians having mined the reservoir. The question we should pose is why the Ukrainians would do this to themselves, given this is Ukrainian territory,” she said.
This image made from video provided by Ukraine’s Presidential Office shows the damaged Kakhovka dam near Kherson, Ukraine, Tuesday, June 6, 2023. Ukraine on Tuesday accused Russian forces of blowing up a major dam and hydroelectric power station in a part of southern Ukraine that Russia controls, sending water gushing from the breached facility and risking massive flooding.
Ukraine’s Presidential Office via AP
Experts have previously said the dam structure was suffering from disrepair. David Helms, a retired American scientist who has monitored the reservoir since the start of the war, wrote in an e-mail that it wasn’t clear if the damage was deliberate or simple neglect from Russian forces occupying the facility.
But Helms reserved judgement, noting as well a Russian history of attacking dams.
Amid official outrage, Ukrainian President Volodymyr Zelenskyy said he convened an urgent meeting of the National Security Council. He alleged that Russian forces set off a blast inside the dam structure at 2.50 a.m. (2350 GMT) and said some 80 settlements were in danger.
This image made from video provided by Ukraine’s Presidential Office shows the damaged Kakhovka dam near Kherson, Ukraine, Tuesday, June 6, 2023. Ukraine on Tuesday accused Russian forces of blowing up a major dam and hydroelectric power station in a part of southern Ukraine that Russia controls, sending water gushing from the breached facility and risking massive flooding.
Ukraine’s Presidential Office via AP
But Kremlin spokesman Dmitry Peskov called it “a deliberate act of sabotage by the Ukrainian side ? aimed at cutting water supplies to Crimea.”
Both sides warned of a looming environmental disaster. Ukraine’s Presidential Office said some 150 metric tons of oil escaped from the dam machinery and that another 300 metric tons could still leak out.
Andriy Yermak, the head of Ukraine’s President’s Office, posted a video showing swans swimming near an administrative building in the flooded streets of Russian-occupied Nova Kakhovka, a city in the Kherson region where some 45,000 people lived before the war. Other footage he posted showed flood waters reaching the second floor of the building.
In this photo provided by the Ukrainian Presidential Press Office, Ukrainian President Volodymyr Zelenskyy, right, chairs the emergency meeting of the National Security and Defense Council on the situation at the Kakhovka HPP after the dam was blown up overnight, in Kyiv, Ukraine, Tuesday, June 6, 2023.
Ukrainian Presidential Office via AP
The Ukrainian Interior Ministry called for residents of 10 villages on the Dnieper’s right bank and parts of the city of Kherson downriver to gather essential documents and pets, turn off appliances, and leave, while cautioning against possible disinformation.
The Russian-installed mayor of occupied Nova Kakhovka, Vladimir Leontyev, said it was being evacuated as water poured into the city.
Ukraine’s nuclear operator Energoatom said in a Telegram statement that the damage to the dam “could have negative consequences” for the Zaporizhzhia Nuclear Power Plant, which is Europe’s biggest, but wrote that for now the situation is “controllable.”
The U.N.’s International Atomic Energy Agency said in a statement there was “no immediate risk to the safety of the plant,” which requires water for its cooling system.
It said that IAEA staff on site have been told the dam level is falling by 5 centimeters (2 inches) an hour. At that rate, the supply from the reservoir should last a few days, it said.
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The plant also has alternative sources of water, including a large cooling pond than can provide water “for some months,” the statement said.
Ukrainian authorities have previously warned that the dam’s failure could unleash 18 million cubic meters (4.8 billion gallons) of water and flood Kherson and dozens of other areas where hundreds of thousands of people live.
The World Data Center for Geoinformatics and Sustainable Development, a Ukrainian nongovernmental organization, estimated that nearly 100 villages and towns would be flooded. It also reckoned that the water level would start dropping only after five-seven days.
A total collapse in the dam would wash away much of the broad river’s left bank, according to the Ukraine War Environmental Consequences Working Group, an organization of environmental activists and experts documenting the war’s environmental effects.
Mykhailo Podolyak, a senior adviser to President Volodymyr Zelenskyy, said that “a global ecological disaster is playing out now, online, and thousands of animals and ecosystems will be destroyed in the next few hours.”
Videos posted online began testifying to the spillover. One showed floodwaters inundating a long roadway; another showed a beaver scurrying for high ground from rising waters.
This satellite image provided by Maxar Technologies shows an overview of the Kakhovka dam in southern Ukraine on Monday, June 5, 2023.
Maxar Technologies via AP
The incident also drew international outrage, including from German Chancellor Olaf Scholz and NATO Secretary-General Jens Stoltenberg, who said the “outrageous act ? demonstrates once again the brutality of Russia’s war in Ukraine.”
Ukraine controls five of the six dams along the Dnieper, which runs from its northern border with Belarus down to the Black Sea and is crucial for the entire country’s drinking water and power supply.
Ukraine’s state hydro power generating company wrote in a statement that “The station cannot be restored.” Ukrhydroenergo also claimed that Russia blew up the station from inside the engine room.
Leontyev, the Russian-appointed mayor, said numerous Ukrainian strikes on the Kakhovka hydroelectric plant destroyed its valves, and “water from the Kakhovka reservoir began to uncontrollably flow downstream.” Leontyev added that damage to the station was beyond repair, and it would have to be rebuilt.
Ukraine and Russia have previously accused each other of targeting the dam with attacks, and last October Zelenskyy predicted that Russia would destroy the dam in order to cause a flood.
Authorities, experts and residents have for months expressed concerns about water flows through _ and over _ the Kakhovka dam.
In February, water levels were so low that many feared a meltdown at the Zaporizhzhia nuclear plant, whose cooling systems are supplied with water from the Kakhovka reservoir held up by the dam.
By mid-May, after heavy rains and snow melt, water levels rose beyond normal levels, flooding nearby villages. Satellite images showed water washing over damaged sluice gates.
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