Sylvensteinspeicher
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| Sylvensteinspeicher | |||||||||
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| Coordinates: | 47°34′40″N 11°32′28″E / 47.57778°N 11.54111°ECoordinates: 47°34′40″N 11°32′28″E / 47.57778°N 11.54111°E | ||||||||
| Dam data | |||||||||
| Built: | 1954 - 1959 | ||||||||
| Height: | 44 m | ||||||||
| Dam volume: | 1 Mm³ | ||||||||
| Length: | 180 m | ||||||||
| Power generation capacity: | 7 MW | ||||||||
| Reservoir data | |||||||||
| Normal water surface: | 767 m | ||||||||
| Maximum water surface: | 6.6 km² | ||||||||
| Active capacity: | 124 Mm³ | ||||||||
| Catchment area: | 1100 km² | ||||||||
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Sylvenstein Dam, is an earthen embankment dam in the Isar valley, in the alpine part of Upper Bavaria. Sylvensteinspeicher is the reservoir created behind the dam.
Several water power plants where built in the tributary of the upper Isar river in the 1920s. For example at the Achensee and Lake Walchen Power Plant and therefore the river ran nearly dry during dry season. The effected mostly the town of Bad Tölz and a reservoir was planned to ensure a minimum amount of water in the river. During dry season a water flow of 4 cubic meters of water per second is released to prevent the Isar from falling dry. Additionally the reservoir provides flood control for the Isar river between Bad Tölz and Munich.
The dam is 44 meter high and has a length of 180 meter and was built between 1954 and 1959. From 1959 on the water was used in a water power plant of 3.2MW which was upgraded in 2000 by new turbines to yield 3.8MW.
During the 2005 European floods, due to the fact that the maximal capacity of the reservoir was reached, more water than normal had to be released into the Isar river, but the flooding would have been more severe if the Sylvenstein Dam had not been present.
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