Naděje Reservoir, lake in Czech Republic

Naděje Reservoir is a dam in the upper Hamerský potok valley below Suchý vrch, 2.7 km south of Luž. Its 92 m long, 9.5 m high dam wall is built of quartzite from a quarry at Milštejn 3 km away and local phonolite, with a 32.8 m concrete spillway and a 200 mm bottom outlet.

The reservoir was built between 1937 and 1938 to supply water to a nearby mill and power a small turbine for electricity. After World War II, it stopped serving these industrial purposes and now mainly helps prevent flooding.

The reservoir's name, Naděje, means "hope" in Czech; the German name was Staudamm Hoffnung. In the surrounding forest, remains of medieval glassworks have been found, and it is thought another stood on the reservoir's site. The yellow trail 6953 and red E10 pass the southern shore.

Access is by a marked forest trail that is closed to vehicles, with parking available about 900 meters away. Walking along the designated path takes you through the woods to reach the dam and water's edge.

The dam is faced with quartzite quarried at Milštejn, 3 km away, and local phonolite from Suchý vrch. About 200 m upstream, a small masonry check dam keeps sediment out of the reservoir. Medieval glassworks remains were found nearby, and another may have stood on the reservoir site.