Hasper dam

Hasper dam
Location:	Ruhr area , Hagen - Haspe
Tributaries:	Hasper Bach
Drain:	Hasper Bach → Ennepe → Volme → Ruhr → Rhine → North Sea
Major cities nearby:	Hagen
	North Rhine-Westphalia , Germany
Coordinates	51 ° 17 '53 " N , 7 ° 25' 2" E Coordinates: 51 ° 17 '53 " N , 7 ° 25' 2" E
	Data on the structure
Construction time:	1901–1904, renovation 1991–1994
Height above valley floor:	29.3 m
Height above foundation level :	34.1 m
Height of the structure crown:	287.30 m
Building volume:	57,000 m³ (before renovation)
Crown length:	260 m
Crown width:	6 m
Radius of curvature :	226.5 m
	Data on the reservoir
Altitude (at congestion destination )	286.32 m
Water surface	18.6 ha
Storage space	2.05 million m³ (or 1.97 million m³)
Catchment area	8 km²
Design flood :	9 m³ / s

The Hasper dam or Haspertalsperre is a dam that was built from 1901 to 1904 according to plans by Otto Intze by the town of Haspe (now a district of Hagen ) in the Ruhr area ( North Rhine-Westphalia ) for drinking water supply . It is one of 14 dams in the Ruhr river system . The inauguration took place on October 11, 1904 .

The dam of Hasper dam is a curved gravity dam from rubble masonry after the intze principle . The dammed body of water is the Hasper Bach . The Haspertalsperre has a pre-basin , the Schöpplenberger pond.

In the years 1991 to 1994 the dam was renovated and reinforced with a sealing shell in front. It was also increased by 40 cm. It is owned by Mark-E Aktiengesellschaft.

The two turrets of the dam wall originally stood further in the middle, but have now been moved outwards to the end of the wall. Two steering wheels are reminiscent of the towers at the original locations. There is also an approximately five-kilometer circular path around the dam.

Originally, the Hasper Talsperre stop of the Haspe – Voerde – Breckerfeld railway was located near the dam , and later tram line 11, which was often the starting point for walks around the dam. Today the so-called Plessen Viaduct still reminds of the small train, it was used to cross the valley. The later bus service to the dam was stopped on May 22, 1977, so that the dam can only be reached on foot or by car today.

The Hasper Bach nature reserve with the meandering streams of the Hasper and Hemkerbach streams borders directly on the fore basin and feeds the dam and its fore basin. The dam and the surrounding area are located in the Hasper dam landscape protection area .