| Frauenau Dam | |
| Name Official: | Trinkwassertalsperre Frauenau |
| Coordinates: | 49.0137°N 13.3334°W |
| Construction Began: | 1976–1983 |
| Dam Crosses: | Little Regen, Hirschbach |
| Dam Elevation Crest: | 770.8 m[1] |
| Dam Height Thalweg: | 70.5 m |
| Dam Height Foundation: | 84.7 or 86 m |
| Dam Length: | 640 m |
| Dam Width Crest: | 9 m |
| Dam Curve Radius: | --> |
| Dam Volume: | 2.5 Mm³ |
| Res Capacity Total: | 21.7 Mm³ |
| Res Capacity Active: | 20.8 Mm³ |
| Res Catchment: | 30.4 km² |
| Res Surface: | 94 ha |
| Res Elevation: | 767 m |
| Plant Capacity: | 617 kW |
The Frauenau Dam (German: Trinkwassertalsperre Frauenau or Trinkwasserspeicher Frauenau) in the Bavarian Forest, in Germany, was built in 1983 to ensure the drinking water supply to large parts of Lower Bavaria.
Because there was a shortage of groundwater in the Bavarian Forest due to the geological situation there, in the years 1976 to 1983 a water storage reservoir was built near Frauenau and Zwiesel, that was fed by the Kleiner Regen and Hirschbach rivers which rose in the unsettled area on the Czech border between the Falkenstein and Rachel.