Hassel Auxiliary Dam
The Hasselvorsperre, also called pre-dam Hassel, in the Harz is one of the pre-dam Rappbodetalsperre in Hasselfelde in the district of Harz, Saxony- Anhalt. The dam was built from 1956 to 1959. It consists of dam, waterworks and reservoir. Its approximately 21.5 m high dam dams on the Hassel for about 25 acres of Hassel reservoir. The pre-dam supplies drinking water and is part of the reservoir operation Saxony- Anhalt.
- 4.1 Location
- 4.2 Data
Purpose
The purpose of the blocking system is the mechanical and biological pre-treatment of the water before it flows into the main lock. In the reservoir, the water comes to rest, so that impurities may deposed. The drinking water can be removed and passed through present in the wall openings with protecting caps from different heights.
Geographical location
The Hasselvorsperre lies between the near Hasselfelde ( district of Upper am Brocken ) in the southeast and located slightly below their dam Hasselarm the northwest propagating Rappbode reservoir.
Dam
Location
The shut-off of the dam stands as a gravity dam about 2.7 km north-west of Hasselfelde. On the northern third of the wall there is an operating building with the operating devices.
Data
The dam was built in 1956-1959. About the foundation base is 21 m, and overall it is about 21.5 m high. The building crown is 141.3 m long and 2.50 m wide. The building contains approximately 14,000 m³ of reinforced concrete. His background consists predominantly of greywacke and to a small extent from dünnspaltendem slate.
Reservoir
Location
The Hassel reservoir is about 2 km north-west of Hasselfelde. It is located approximately midway between the raven stones ( about 510 m above sea level. NN ) in the west and the Hoppelberg ( 507.5 m above sea level. NN ) in the east. The river is jammed with the Rappbode inflow Hassel the eastern of the two main tributaries of the Rappbode reservoir; also lead more small streams, such as the Sautal - stream, in the reservoir.
Data
The reservoir is approximately 25 hectares in size. In the south-north direction it extends - measured approximately along the dam centerline - to around 2 km in length, and it is up to about 400 m wide. He has about 1.47 million m³ storage space and 1.64 million m³ total storage space. Its water surface is at 432.8 m above sea level. NN and its catchment area is approximately 44.1 km ².
In the normal case, the reservoir because it does not serve the flood protection, constantly filled with water, and the controllable release of water, the drying up of the river valleys is prevented.
Tourism
To the dam and the dam leads a 5.6 km loop trail. The Hasselvorsperre is included as No. 53 ( 51.70966666666710.831166666667 ⊙ ) in the system of stamp locations of the Harz hiking pin. Fishing in the reservoir is possible with approval, swimming is prohibited.