Bostalsee
| Bostalsee | |
|---|---|
| Location | Sankt Wendel |
| Coordinates | 49°34′06″N 7°04′19″E / 49.56833°N 7.07194°E |
| Construction began | ca. 1973 |
| Opening date | ca. 1975 |
| Dam and spillways | |
| Impounds | Bos, Dämelbach |
| Height (foundation) | 22.25 m |
| Height (thalweg) | ca. 20 m |
| Length | 500 m |
| Elevation at crest | 402.75 m |
| Width (crest) | 5 m |
| Dam volume | 320,000 m3 |
| Spillway capacity | 35 m3/s |
| Reservoir | |
| Total capacity | 8 million m3 |
| Catchment area | 12.2 km2 |
| Surface area | 120 ha or 107 ha (long term) |
| Normal elevation | 401.00 m or 400.00 m (long term) |
The Bostalsee is a reservoir in the municipality of Nohfelden in the northern Saarland. It was created in 1979. The dam has a length of 500 metres. The lake is almost exclusively used for recreation. The hydropower from the stored water has been used since the end of 2013 to a small extent to generate electricity, especially to light the circular walk around the lake in winter. The southwestern part of the lake has been designated as a nature reserve.