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This article presents a case of reclamation of excavations after exploitation of gravel located in the Vistula River near Oswiecim. Gravel deposits are located there shallowly below the surface and they are associated with river accumulation. This area is characterized by a very high level of groundwater vulnerability. After depletion of the gravel field, the excavations are liquidated by backfilling with waste, usually mine waste. The material to be used underwent a formal assessment of its impact on the aquatic ...