A large quantity of waste, estimated at between 4,000 and 5,000 cubic metres, invades the dam of a hydroelectric power station on the Drina river in eastern Bosnia. One of Bosnia's five major rivers, the Drina is regularly polluted by the illegal dumps that arise along its banks. This waste is normally stopped by anti-pollution dams, which are located upstream of the power plants, and then collected. But during high water, these dams break under a large quantity of garbage that then invades the area in front of the dam of the power station.