Oker Reservoir
| Oker Dam | |
|---|---|
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 Location of Oker Dam in Germany
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| Country | Germany |
| Coordinates | 51°50′29″N 10°27′10″E / 51.84139°N 10.45278°ECoordinates: 51°50′29″N 10°27′10″E / 51.84139°N 10.45278°E |
| Construction began | 1938 |
| Opening date | 1956 |
| Dam and spillways | |
| Height | 75 m |
| Length | 260 m |
| Width (crest) | 8 m |
| Width (base) | 19 m |
| Dam volume | 140,000 m³ |
| Reservoir | |
| Creates | Oker Reservoir |
| Total capacity | 47,400,000 m³ |
| Catchment area | 85 km² |
| Surface area | 225 ha |
| Power station | |
| Installed capacity | 4.14 MW |
| Oker Pre Dam | |
|---|---|
| Country | Germany |
| Coordinates | 51°49′19″N 10°26′42″E / 51.82194°N 10.44500°E |
| Construction began | 1953 |
| Opening date | 1954 |
| Dam and spillways | |
| Height | 20 m |
| Length | 100 m |
| Width (base) | 14.0 m |
| Dam volume | 16,000 m³ |
| Reservoir | |
| Total capacity | 520,000 m³ |
| Surface area | 12 ha |
| Oker Dam Stilling basin | |
|---|---|
| Country | Germany |
| Coordinates | 51°52′11″N 10°28′13″E / 51.86972°N 10.47028°E |
| Construction began | 1953 |
| Opening date | 1954 |
| Dam and spillways | |
| Length | 78 m |
| Dam volume | 7,800 m³ |
| Reservoir | |
| Total capacity | 204,000 m³ |
| Surface area | 2 ha |
The Oker Dam (German: Okertalsperre) is a dam in the Harz mountains in Lower Saxony, Germany. It is fed by the River Oker.
The dam is in the shape of an arch (see arch-gravity dam). It is 75 m high, 260 m long, can impound up to 47 million m³ of water and provides hydropower, flood protection and water regulation at times of low water. It is also used indirectly for the production of drinking water. Its average annual is 75 million m³. The hydro-electric power station at Romkerhalle is fed by the Oker Reservoir.
Dam, downstream side
Downstream face of the dam
Spillways on the dam
Table with technical data on the Oker Dam
The construction of the Oker Dam was begun by Hr. Press in the years 1938 to 1942 and then completed between 1949 and 1956. Its completion became pressing following the devastating floods in Wolfenbüttel and Brunswick in the winter of 1946/47 when there were heavy falls of snow. Before work started the small hamlet of Schulenberg in the valley had to be abandoned; it was rebuilt above the reservoir.
The Oker Reservoir lies alongside the B 498 federal road, that follows the course of the River Oker between Goslar and Altenau. On the east bank is a forest road, that is out of bounds to private vehicles.
Main dam under construction
Main dam under construction
Main dam under construction
Oker Reservoir: view from Schulenberg to the Upper Harz
With its many side arms the Oker Reservoir resembles the much larger Bigge Reservoir in the Sauerland in west Germany. For the same reason it is also known as the "Vierwaldstättersee of the Harz".
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Wikipedia