Argentat power plant
| Argentat power plant | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 |
|||||||||
|
|||||||||
|
|||||||||
| Coordinates | 45 ° 6 '15 " N , 1 ° 57' 14" E | ||||||||
| Data on the structure | |||||||||
| Lock type: | Gravity dam | ||||||||
| Construction time: | 1954-1957 | ||||||||
| Height above valley floor: | 31 m | ||||||||
| Height above foundation level : | 34 m | ||||||||
| Crown length: | 196 m | ||||||||
| Crown width: | 27.35 m | ||||||||
| Base width: | 35.50 m | ||||||||
| Power plant output: | 48 MW | ||||||||
| Data on the reservoir | |||||||||
| Water surface | 1.06 km² | ||||||||
| Storage space | 7200000 m³ | ||||||||
 |
|||||||||
The Argentat power plant is a French dam in the Corrèze department ( Nouvelle-Aquitaine region ). The structure dams the upper reaches of the Dordogne two kilometers upstream from Argentat .
description
The storage power plant Argentat, French Barrage d'Argentat , alternatively also known as French Barrage du Sablier , was built between 1954 and 1957 and is used to generate electricity from hydropower.
This is a battery-type power plant. The five existing batteries are hollow inside and only three of them are equipped with turbines . The dam is made of concrete and the work was directed by André Borie. The foundations of the dam wall were injected into the granite . The catchment area of the Dordogne at the level of the power station is 4412 km².
The reservoir is about 8 kilometers long and reaches just below the Barrage du Chastang . It lies at an altitude of 192.5 meters above sea level. Its surface is 106 hectares with a volume of 7.2 million cubic meters. The Doustre and the Glane flow into the reservoir . In addition to Argentat, it is surrounded on the right by the communities of Saint-Martial-Entraygues and Saint-Martin-la-Méanne , on the left by Hautefage and on both sides by Servières-le-Château .
Dimensions
The Argentat power station has modest dimensions compared, for example, to the Barrage du Chastang - the last large dam in the Dordogne - whose reservoir is 50% longer.
The concrete dam towers over the valley floor by 31 meters, but the foundation floor by 34 meters. Its crown is 27.35 meters wide and 196 meters long. The dam wall measures 35.5 meters at its base. The total volume of the structure is 85,000 cubic meters.
geology
In the area of the power plant including the reservoir, the Dordogne cuts through the crystalline basement of the Massif Central . Upcoming are mica slate , leuco granite , granite and eye gneiss . In the first third of the reservoir, the Dordogne crosses parautochthonous mica schist. The Goulles leukogranite follows upstream and the Glény granite below the Barrage de Chastang, as well as the eye and ribbon gneisses . The entire sequence is interspersed in places with north to predominantly north-northeast trending lamprophyre dikes. The rocks are part of the southern massif de Millevaches - a north-south oriented parautochthonous basement bulge.
500 meters below the dam attracts the north-south trending Argentat Disorder by - a significant cataclastic rupture zone, the Massif de Millevaches of the gneisses of the Limousin separated. The Argentat Upper Carboniferous coal basin is just 1,000 meters to the west, 500 meters beyond the fault .
The substation
Detailed view of the dam from the south
The reservoir in the immediate vicinity of the dam
The reservoir near Longeval (between Hautefage and Saint-Martial-Entraygues)
The Château Gibanel located on the reservoir near Saint-Martial-Entraygues
.JPG){kind=spacer}
.JPG)
.JPG)
.JPG)
literature
- H. Labernadière: Argentat . In: Carte géologique de la France at 1/50 000 . BRGM, 1992.
