Olef Dam
View from the south. Left rear: the dam | |
| Location | Euskirchen |
|---|---|
| Coordinates | 50°29′42″N 6°25′17″E / 50.4950°N 6.4215°E |
| Construction began | 1954–1959 |
| Dam and spillways | |
| Impounds | Olef |
| Height (foundation) | 59 m |
| Height (thalweg) | 54.6 m |
| Length | 282 m |
| Elevation at crest | 466.9 m |
| Width (crest) | 5.7 m |
| Dam volume | 123,000 m3 |
| Reservoir | |
| Total capacity | 20,3 Mm3 |
| Active capacity | 19.3 Mm3 |
| Catchment area | 47.92 km2 |
| Surface area | 1.1 km2 |
| Normal elevation | 465.5 m |
The Olef Dam (German: Oleftalsperre) is located in the vicinity of the Eifel National Park near Hellenthal within the High Fens-Eifel Nature Park in the county of Euskirchen in the German state of North Rhine-Westphalia. Its reservoir stores around 20 million cubic metres and is fed by the River Olef.