| Grane Dam | |
|---|---|
 | |
  Location of Grane Dam in Lower Saxony | |
| Country | Germany |
| Location | Lower Saxony |
| Coordinates | 51°54′32″N 10°22′28″E / 51.90889°N 10.37444°E |
| Construction began | 1966 |
| Opening date | 1969 |
| Dam and spillways | |
| Height | 67 m |
| Length | 600 m |
| Width (crest) | 8 m |
| Dam volume | 1.8 million m³ |
| Spillway capacity | 70 m³/s |
| Reservoir | |
| Total capacity | 46.39 million m³ |
| Catchment area | 22 km² |
| Surface area | 219 ha |
The Grane Dam (German: Granetalsperre) is a dam above the village of Astfeld/Herzog-Juliushütte in the borough of Langelsheim in the Lower Saxon part of the Harz mountains.