Lake Zbilje, Reservoir on the Sava near Zbilje, Slovenia

Lake Zbilje is a reservoir on the Sava River by the village of Zbilje, formed in 1953 when the Medvode hydroelectric plant's dam was built. It is 40 to 250 m wide, covers 69 ha and reaches 5 km in length between Medvode and Mavčiče, where the HE Mavčiče dam stands. The dam rests on Triassic dolomite, sealed with concrete curtains injected 27 to 45 m deep.

Lake Zbilje was created in 1953 when the Medvode hydroelectric power plant dammed the Sava River. The dam rests on Triassic dolomite, and its watertightness was achieved by injecting concrete curtains 27 to 45 metres deep. The reservoir flooded the old riverbed and lower bank terraces, and by the mid-1990s it was partially dredged after sedimentation had reduced recreational use.

The lake is named after the village of Zbilje, which has a boat rental service on its shore. The other settlements along the water are Podreča and Dragočajna, the latter with a hotel and campsite. A bridge crosses the lake between Zbilje and Valburga, below Smlednik Castle.

The shoreline is accessible year-round with a well-maintained path suitable for walking, cycling, and enjoying the outdoors for visitors of all ages. A few simple rest stops and picnic areas are available along the water where families can spend time together.

The dam rests on Triassic dolomite into which the Sava cut its bed; watertightness was achieved by injecting concrete curtains 27 to 45 metres deep down to impermeable bedrock. The reservoir flooded the old river channel and lower bank terraces, and since the Mavčiče plant was built, the Sava has deposited an estimated 100,000 m³ of gravel and silt in the basin each year.