Analysis of the risks generated by the tailings ponds near the city of Borşa

The paper presents the risks regarding physical and chemical stability of tailings ponds grouped under name Ds (D1, D2, D3, D4) located on right bank river Cisla near residential area Baia Borşa Colbu pond upstream Borşa. closure these was done in a defective manner, without complying with design execution rules provided Technical Regulation waste storage. are two types risks: first type, due to instability that produces continuous acid drainage second instability, erosion extreme weather conditions which could lead failure dams, very serious consequences, causing material damages loss life. risk breaking dams is even higher as it vicinity or areas geographical structure valley type containing high debit.