| Josefův Důl Reservoir | |
| Coords: | 50.7947°N 15.1956°W |
| Type: | reservoir |
| Inflow: | Kamenice, Hluboký potok, Blatný potok, Červený potok |
| Outflow: | Kamenice |
| Basin Countries: | Czech Republic |
| Area: | 138.1ha |
| Max-Depth: | 44m (144feet) |
| Volume: | 23000000m2 |
| Elevation: | 730m (2,400feet) |
| Pushpin Map: | Czech Republic |
| Pushpin Map Alt: | Location of Josefův Důl Reservoir in Czech Republic |
The Josefův Důl Reservoir (cs|vodní nádrž Josefův Důl) is a reservoir in Josefův Důl in the Liberec Region of the Czech Republic. It was built on the Kamenice River in 1976–1982 and is the largest reservoir in the Jizera Mountains.[1]
The dam has a height of and a length of . The reservoir has a capacity of 23 million cubic meters and its maximal depth is . Its main purpose is the supply of drinking water, so recreational activities are not permitted upon it.[2]