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The Schluchsee with the town of the same name
The Schluchsee with the town of the same name
Location: Breisgau-Hochschwarzwald district, Germany
Headwaters: Schwarza
Main villages nearby: Schluchsee, St. Blasien
Coordinates: 47┬░49ÔÇ▓17ÔÇ│N 8┬░9ÔÇ▓10ÔÇ│E´╗┐ / ´╗┐47.82139┬░N 8.15278┬░E´╗┐ / 47.82139; 8.15278Coordinates: 47┬░49ÔÇ▓17ÔÇ│N 8┬░9ÔÇ▓10ÔÇ│E´╗┐ / ´╗┐47.82139┬░N 8.15278┬░E´╗┐ / 47.82139; 8.15278
Dam data
Built: 1929-1932
Height above valley floor: 35 m
Structural height: 63.5 m
Height above sea level: 931.5 m
Dam volume: 124,000dep1
Length: 250 m
Crest width: 3.7 m
Reservoir data
Normal water surface: 930 m
Maximum water surface: 5.14 km┬▓
Reservoir length: 7.5 km
Reservoir width: 1.4 km
Active capacity: 108,000,000 m┬│
Total capacity: 114.3 Mm┬│
Catchment area: 72.78 km┬▓
Design flood: 139.8 m┬│/sdep1
Schluchsee bei Aha 02.jpg
Schluchsee (seen from Aha)

The Schluchsee is a reservoir lake in the district of Breisgau-Hochschwarzwald, southeast of the Titisee in the Black Forest near Freiburg im Breisgau, Germany.



The Schluchsee, with its height of 930 metres above sea level, is the highest reservoir in Germany and also the largest lake in the Black Forest[1][2]. By contrast the Hornberg Basin (Hornbergbecken), is 1,048 metres above sea level, but is the upper basin of a pumped storage hydropower station, rather than a reservoir.

The water of the reservoir is relatively cool even in summer because of its high elevation.

The best-known settlements around the Schluchsee are on its northern shores and include the eponymous town of Schluchsee and the hamlets of Seebrugg by the dam itself and Aha. The Three Lakes Railway, an extension of the H├Âllentalbahn, runs from Titisee station along the northern shore to the terminus at Seebrugg.


The original lake, now drowned, with its large raised bog, the Feldmoos

The surface of the original, undammed Schluchsee, a glacier lake, was around 30 metres lower than that of today's reservoir. Despite the dam, the Schluchsee appears natural. The lake is 7.3 long by 1.4 kilometres across. Its 63.5 m high dam was built between 1929 and 1932, impounding the river Schwarza. In order to construct this gravity dam, the natural lake had first to be deepened by 13 metres. That was achieved in 1930 by a blasting out a tunnel in the rock. After that the intake structure of the dam could be built. Today the lake has a maximum depth of 61 m[1].

The Schluchsee is part of the Schluchsee hydropower station complex run by the Schluchseewerk which has a number of reservoirs of different heights linked by pumping stations. This complex stretches from H├Ąusern to Waldshut. The Schluchsee is therefore the upper basin of the H├Ąusern pump storage hydropower station. The average power generated by the H├Ąusern power station is 100 Megawatts[3].

The Schluchsee is a popular particularly with swimmers and sailors. Unlike the Titisee, almost all of the Schluchsee's shoreline is easily accessible. As a result the Schluchsee is very busy in summer and is a popular local resort - even just across the Swiss border. Skinny dipping on the forested side of the lake occasionally causes offence however.

In 1982 the Schluchsee became known Germany-wide as the Schlucksee ("Swig Lake") because the German football team 1982 chose the area as their training camp and some players, permitted by the team manager, Jupp Derwall, made full use of it. Excessive alcohol consumption, card games and other escapades showed the subsequent world runners-up in a bad light[4].

In 1983 almost all the water in the reservoir was drawn down for inspection purposes, rendering the normal swimming, fishing and sailing activities impossible. This rare occurrence still drew many visitors, however, because for the first time the drowned settlements were visible again.

In recent times there have been several conflicts between the Schluchseewerk and the municipality of Schluchsee over the water level of the lake in summer. Whilst the Schluchseewerk is interested in the optimal, economic use of the water and therefore a considerable reduction in the level of the lake, the town is concerned about losing tourists if the lake falls too low for long periods during the summer and exposes a rather unsightly shoreline.


The Schluchsee is surrounded by numerous walking trails in the local area. The entire length of the shoreline, about 18 km long, is walkable, mostly level and suitable for prams. From May to October the walks may be combined with boat trips on the pleasure cruiser St. Nikolaus.

View from Bildstein
A frozen Schluchsee seen from the B 500 federal road


  1. ^ a b Seen und Weiher im s├╝dlichen Hochschwarzwald und Breisgau, at Retrieved on 19 Oct 2009.
  2. ^ Schluchsee als Stausee at, S├╝dbaden. Retrieved on 19 Oct 2009.
  3. ^ Das Kraftwerk H├Ąusern, Schluchseewerk, at Retrieved on 19 Oct 2009.
  4. ^ Exzesse am Schlucksee, Eike Immel (Protokoll:Andreas Bock), 11Freunde. Retrieved on 19 Oct 2009.

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