Šance Reservoir, Mountain reservoir in Staré Hamry, Czech Republic.

Šance Reservoir is a valley dam reservoir on the upper course of the Ostravice River in the Moravian-Silesian Beskids, impounded by a dam 342 m long at its crest and 6 m wide at the top, with a base 195 m wide and a body of 1.34 million m³ of material. Its surface covers 3.37 km². A slender tower with a small structure at its top stands by the shore, and a blue rectangular tower on concrete supports rises from the water.

The dam was built between 1964 and 1969, requiring the relocation of Staré Hamry residents and removal of an existing railway line. This period of reconstruction fundamentally changed the region and created a new water landscape.

The reservoir takes its name from the hill Šance (576 m) on the left bank near the dam. Because the water supplies the Nová Ves drinking-water plant in Frýdlant nad Ostravicí, it is under hygiene protection and swimming, fishing and other recreation are banned. The flooded centre of Staré Hamry lies beneath the surface.

The reservoir is a drinking-water source for the Nová Ves treatment plant in Frýdlant nad Ostravicí, so swimming and other recreation are prohibited; the shoreline is not a hiking destination. The dam stands near the hamlet of Staré Hamry, and the road to Bílá runs on an estacade on the slope above the left bank.

The dam was built with an inclined clay core, a specialized construction method that effectively seals water. A deep injection barrier beneath the dam helps prevent water from seeping through and keeps the structure stable.