Wastewater treatment plant Bled is located between the southern edge of Lake Bled and river Sava Bohinjka, the river Jezernica and the hills Obroč and Kozarca at an altitude of 450 m. During excavation works for the plant, around 7m thick succession of late Pleistocene and Holocene sediments was discovered. The aim of this thesis is detailed sedimentological analysis of these sediments and interpretation of the evolution of the area in the aforementioned time frame. The investigated succession starts with multiple layers of glacio-fluvial sediments ranging from gravel to sand with a thickness of approximately 380 cm, continues with lacustrine clays, silts and sands with thickness of approximately 150 cm and ends with freshwater biogenic carbonate accumulations with a thickness of 100 cm. The latter represents tufa sediments, which consists of a complex of channels and discontinuous layers of debris tufa, travertine and layers of silty-sandy carbonate sediment, among which appear phytoherm forms. In the lower part of the succession also deformation textures are visible. The lower part of the succession was formed in glacio-fluvial and alluvial sedimentation regime at the end of the last glacial peak. Tufa in this area does not deposit anymore and is completely isolated from the today's Sava river. We assume that the formation of tufa was relatively short-lived and associated with post-glacial evolution of Lake Bled and its tributaries.