Linach dam
| Linach dam | |||||||
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| Coordinates | 48 ° 1 '6 " N , 8 ° 17' 26" E | ||||||
| Data on the structure | |||||||
| Construction time: | 1922-1925 | ||||||
| Height above valley floor: | 25 m | ||||||
| Height above foundation level : | 36 m | ||||||
| Height above the river bed : | 29.4 m | ||||||
| Height of the structure crown: | 849.5 m | ||||||
| Building volume: | 7th 000 m³ | ||||||
| Crown length: | 143 m | ||||||
| Power plant output: | 0.630 MW | ||||||
| Data on the reservoir | |||||||
| Altitude (at congestion destination ) | 847.45 m | ||||||
| Water surface | 11 ha | ||||||
| Storage space | 1.1 million m³ | ||||||
| Catchment area | 10.8 km² | ||||||
| Design flood : | 30 m³ / s | ||||||
The Linach dam in Vöhrenbach ( Schwarzwald-Baar district , Baden-Württemberg ) is a 25-meter-high and 143-meter-long dam ( pier dam ) made of concrete. It is the only series of vaulted dam in Germany and is a listed building . This material-saving design was chosen for cost reasons. There are further examples of the construction principle of such a dam in a “split-up construction” in Belgium, Italy, France, Switzerland and the USA. In Germany there is only one other pier dam: the Oleftalsperre . However, this was built in pillar cell construction. This is a slightly different construction principle than the Linachtalsperre.
history
The dam in the Linach Valley (side valley of the Breg ) was built between 1922 and 1925 by the city of Vöhrenbach under Mayor Karl Kraut to generate electricity using a hydropower plant . It was designed by Karl Kammüller . In 1969 the power plant was stopped. The decisive factor for this was a payment from the regional energy supply company in the amount of DM 300,000. Instead of self-supply, the company relied on long-term supply contracts with this external supplier. The transfer fee therefore paid off for both sides. As the demolition costs were avoided, the facility was retained. In 1988 the water was drained for safety reasons. Since then, the valley has mainly served as a local recreation area . After renovation, the water was dammed again in 2007.
Power plant house at the Kohlbrücke
The power station building belonging to the Linachtalsperre was built in the years 1922–1924 in Art Nouveau style. It is about two kilometers below the dam in the Linach Valley. The water is led from the lake to the water lock or valve house via a tunnel and a pressure pipe and then via the downpipe with a height difference of around 80 m to the turbines in the power house .
The original equipment at that time was two 340 hp Francis spiral turbines and a free jet turbine with 60 hp for generating electricity. The original turbines were replaced in the 1940s. The turbines then installed (three Francis spiral turbines) are still functional today and are used to generate electricity with the diversion power plant that was built in 1998.
Redevelopment
The power plant was reactivated in the 1990s on the initiative of citizens from the region. Since 1998 electricity has been generated again via the turbines with a diversion power plant . Since 1999, a development association has been taking care of bringing the dam back into a safe condition. A number of public bodies and foundations are participating in the financing.
The water law permit for the re-dam was issued by the Freiburg Regional Council in March 2005. In 2006 and 2007 the dam was completely renovated. A complex concrete renovation was carried out on the air side, with the damaged areas being blasted with water jet technology and repaired with special shotcrete . The water side was coated with geomembrane sealing and thus permanently sealed. The trial jam began on March 16, 2007 . In the autumn of 2007 the full backlog was reached. The power plant was adapted to the changed conditions of the full congestion and on December 15, 2007 it could be officially put into operation again with a "festival of lights". In the future, the “ renewable energy ” power plant will feed 1.2 million kilowatt hours into the power grid every year. On June 25, 2008, the permit for regular damming was granted, so the power plant has been in normal operation since then.
Usage and events
tourism
The city of Vöhrenbach is hoping that the reservoir will have potential as a tourist attraction. The dam is now accessible again after the construction work. A path with an integrated hydropower educational trail was laid out around the reservoir . Many plants can be easily observed on this path, as they grow at head height on the embankment and you walk through both dry and warm (north bank) and moist (south bank) biotopes. The power station building is accessible as a museum .
Sports
Since 2010 the "Stauseelauf" has been taking place in Vöhrenbach as a long-distance run over 11.5 kilometers. Start and finish are in Vöhrenbach, but the route also leads over the top of the dam wall. There, in addition to the regular race winner, the "Wall King" is chosen, i.e. the first runner on the dam.
In the Black Forest Bike Marathon mountain bike marathon (start in Furtwangen), the long 120-kilometer route leads over the top of the dam wall.
Reservoir theater
In the summer of 2008 the open-air theater De Linacher Stausee by Bernhard Dorer was performed below the dam . It is about the construction of the Linach Dam in the 1920s. Around 5,000 visitors came to the six performances. For this event, a natural grandstand for just over 1000 spectators was created below the dam. In 2011 the amateur theater group Linach celebrated its 100th anniversary. On this occasion, the reservoir theater was performed again. There were three performances of 3,000 visitors.
The play takes place in the 1920s and tells the story of Leopold Läufer's fictional family. She lived in Dotter-Kathrin-Hisle during the construction of the Linach dam. The family is hit hard by the decision of the municipality of Vöhrenbach to build the dam, which is to be built to eliminate the notorious lack of electricity and to secure industrial growth: their house will have to give way to the reservoir.
In the play "De Linacher Stausee", Bernhard Dorer describes the harsh living conditions after the First World War . The very own Black Forest peculiarities to deal with it are presented humorous and aptly. The open-air play is played by the Linach amateur drama group. Florian Klausmann is the director of the amateur theater group. The play has a total of 30 speaking roles. The Linach men's choir with 25 singers is also there. There are also 30 extras.
XXX Forest Dream Festival
At the end of May 2014 the XXX Waldtraum Festival took place at the Linachtalsperre. Over 1000 guests celebrated until late into the night on three dance floors, with nine DJs and two bars, one of the legendary parties of the XXX party collective. The until then largest event of the XXX party collective had attracted a lot of attention in advance. All tickets had been sold within 24 minutes in advance, so that many party-goers missed out.
On October 11, 2014, the second edition of the Waldtraum Festival took place at the Linacher Dam.
literature
- Berhard Kleiser, Wilfried Dold, Bernhard Adler (Red.): The Linachtalsperre. History of a monument in the Black Forest community of Vöhrenbach . Vöhrenbach town history working group of the "Frohsinn" homeland guild, Vöhrenbach 1990, 2nd edition.
- Wilfried Dold, Bernhard Adler, Bernward Janzing , Werner Seim: The big book of the Linachtalsperre. Built 1921–1925, reactivated 2005–2007 . Dold Verlag, Vöhrenbach 2008, ISBN 978-3-927677-75-3 .
- W. Seim, R. Pörtner, H. Klapp: The Linach dam near Vöhrenbach in the Black Forest - damage analysis and monument-compatible repair concept , civil engineer, 2001, issue 11, p. 716
See also
Web links
- The Linachtalsperre near Vöhrenbach - “Save the Linachtalsperre” e. V.
- The "Linacher Stausee" Interesting documentation with historical finds: old and new pictures of the
- “De Linacher Stausee” - open-air theater performance 2011
- Information, materials and excursion suggestions State Education Server Baden-Württemberg