A Dam Broke and Flooded a Region Here

The Kakhovka Hydroelectric Power Plant Dam sat across the Dnipro at Nova Kakhovka, a 3.2-kilometer wall of concrete and earthworks that held back the last of the six great Dnipro cascade reservoirs. The Kakhovka Reservoir stored eighteen cubic kilometers of water, roughly the volume of the Great Salt Lake, and had been the drinking supply for Kryvyi Rih and much of southern Ukraine, the coolant source for the Zaporizhzhia nuclear plant, and the irrigation for the wheat and sunflower belt of Kherson Oblast. Around 2:50 a.m. on June 6, 2023, an internal explosion inside the dam machine hall breached the structure. Within twenty-four hours the reservoir was draining downriver in a wall of water. Russian forces had held the dam since March 2022. Ukraine and independent investigations by the New York Times, the Norwegian seismic institute NORSAR, and the humanitarian intelligence firm Truth Hounds concluded the breach was consistent with a controlled internal detonation rather than shelling or structural failure; Ukrainian intelligence named the Russian 205th Motorized Rifle Brigade as the unit that placed the charges. Russia denied responsibility and blamed Ukrainian strikes. The dam had been under exclusive Russian military control at the moment of the explosion. The flood inundated more than eighty settlements on both banks of the Dnipro downstream to the Black Sea. Ukrainian authorities evacuated roughly 16,000 people from the right bank; Russian-controlled left-bank areas, where casualties are widely believed to have been higher, evacuated a fraction. Confirmed deaths ranged from dozens on the Ukrainian side to unknown numbers in occupied areas. The Nova Kakhovka zoo drowned. Farmland from Nova Kakhovka to the Kinburn Peninsula was left saline and mine-strewn. Kryvyi Rih, which had drawn seventy percent of its water from the reservoir, moved onto an emergency pipeline. Upstream, the reservoir became a muddy plain crossed by the exposed old riverbed, and archaeologists found Cossack-era boats in the drained shallows. The damage is measured across a generation. UNESCO called it one of the worst environmental catastrophes in Europe since Chernobyl. Ukrainian engineers began designing a replacement dam in 2024; construction cannot start until the left bank is recovered. The Nova Kakhovka memorial to the flood, still improvised, stands at the water intake of the ruined machine hall. It carries the names of the confirmed dead and, in place of the missing, the words the reservoir used to hold.