The Möhne Dam was destroyed by British bombers in Worldwar II during Operation Chastise on the night of 16–17 May 1943, together with the Edersee dam in northern Hesse. Special bouncing bombs had been constructed which were able to skip over the protective nets that hung in the water. A huge hole of 77 m by 22 m was blown into the dam. The resulting huge floodwave killed at least 1579 people, 1026 of them foreign forced labourers held in camps downriver. The small city of Neheim-Hüsten was particularly hard-hit with over 800 victims, among them at least 526 victims in a camp for Russian women held for forced labour.