sentences:  These dams were removed later, with the exception of Calafquén Lake, which still retains its dam.By 23 May, the main dam had been lowered from 24 to 15 meters, allowing 3 cubic kilometers of water to leave the lake gradually, but still with considerable destructive power.The settlements of Los Lagos, Antilhue, Pishuinco and the riverside areas of Valdivia were partially flooded.