Pre-lock Thossfell
| Pre-lock Thossfell | |||||||||
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| Coordinates | 50 ° 31 '2 " N , 12 ° 14' 1" E | ||||||||
| Data on the structure | |||||||||
| Construction time: | 1961-1965 | ||||||||
| Height above valley floor: | 14 m | ||||||||
| Height above foundation level : | 21 m | ||||||||
| Height of the structure crown: | 378 m above sea level NN | ||||||||
| Building volume: | 9 100 m³ | ||||||||
| Crown length: | 154 m | ||||||||
| Crown width: | 2 m | ||||||||
| Data on the reservoir | |||||||||
| Altitude (at congestion destination ) | 375.05 m above sea level NN | ||||||||
| Water surface | 33 ha | ||||||||
| Storage space | 1.23 million m³ | ||||||||
| Total storage space : | 1.97 million m³ | ||||||||
| Catchment area | 104.9 km² | ||||||||
| Design flood : | 130 m³ / s | ||||||||
The Vorsperre Thoßfell is one of two pre-dams of Pohl dam . The barrier structure is a prestressed concrete dam in the valley of the Trieb .
Dam wall
The dam is a straight, slim 21 m high gravity dam that is anchored to the ground with tendons according to plan , a construction method that is unique in Germany. Otherwise there are only a few gravity dams that were subsequently reinforced with the help of prestressing anchors.
At the level of the dam target, the dam has two large passages in the middle, which serve as overflow and flood relief . As a rule, the pre-lock is blocked until it is completely blocked and it is allowed to overflow. A bottom outlet is available for emergencies or for the purpose of lowering.
The second, smaller Neuensalz pre-barrier is built in the same way, but has only one overflow. Both dams are dammed from the air side by the Pöhl dam. Only at low water in the dam Poehl are stilling basin to see.
Recreational sports are possible on the Pöhl reservoir up to the two pre-barriers, but not in the pre-barriers themselves.
See also
literature
- Hans-Ulrich Sieber: Dams in Saxony, 1992.