 A dam in the Iron Gate, completed in 1972, raised the water level of the lower Danube basin and caused significant flooding.Between 1970 and 1980, a system was built to protect the fortress and surrounding city from future high water, however there was once again major flooding in 2006, a result of heavy rainfall and melting snow.The fortress has been the focus of restoration and conservation efforts, followed by archaeological and architectural research, since at least 1970.