
The RAF lost 53 aircrew killed and 3 captured, with 8 aircraft destroyed. Despite rapid repairs by the Germans, production did not return to normal until September. An estimated 1,600 civilians – about 600 Germans and 1,000 forced labourers, mainly Soviet – died. Factories and mines were also damaged and destroyed. Two hydroelectric power stations were destroyed and several more damaged. The Möhne and Edersee dams were breached, causing catastrophic flooding of the Ruhr valley and of villages in the Eder valley the Sorpe Dam sustained only minor damage. 617 Squadron, later called the Dam Busters, using a purpose-built " bouncing bomb" developed by Barnes Wallis. Operation Chastise was an attack on German dams carried out on 16– by Royal Air Force No. (including 1,000+ prisoners and forced labourers, mainly Soviet). Eder, Möhne and Sorpe (Röhr) rivers, Germany
