Holtorfer Hardt
| Hardt | |
|---|---|
 Research center for hunting studies |
|
| height | 150.8 m above sea level NN |
| location | Bonn - Holtorf , North Rhine-Westphalia |
| Mountains | Pleiser hill country |
| Coordinates | 50 ° 44 '5 " N , 7 ° 10' 19" E |
The Hardt is a north-eastern elevation of the Ennert ridge , which covers the Siebengebirge to the north, in the area of the Bonn district of Holtorf . To distinguish it from the Dollendorfer Hardt and another hardt further south, it is also called Holtorfer Hardt or Ennert-Hardt . It reaches a height of 150.8 m above sea level and, like the entire western slope of the Ennert, is forested.
Today the Hardt is crossed by the Pützchens Chaussee and Oberkasseler Straße . There is the Hardtweiher, the research center for hunting with a game reserve, a lookout point and a hiking hut. Niederholtorf is located on the eastern slope. The Alaunbach and the Teufelsbach flow to the north and the Ankerbach to the south from the Hardt. To the south lies the Röckesberg , to the west the eponymous elevation of the Ennert , to the north-east the Holzlarer See, which is fed by the Holtorfer Bach .
history
Three barrows were found on the western slope of the Hardt .
Around 1800 lignite was mined in the Ennert and the hill country adjoining it to the east . In 1807, Leopold Bleibtreu recognized a lower, approximately 1.5 m thick, sulphurous gravel and clay-containing coal layer in the seams and the possibility of extracting alum from it and with this coal. As a result, these seams were mined and on the Hardt in two Alaunhütten the Bleibtreu family and in the work of the entrepreneur Matthias hunters alum processed. From 1835 there was also underground mining. From 1853 the entrepreneurs Bleibtreu and Jäger merged to form the Bonner Bergwerks- und Hütten-Verein Aktiengesellschaft . Your cement factory in Bonn supplied itself with raw materials on the Hardt. From 1863 onwards, as cheaper methods of extracting alum had been developed elsewhere, production fell and was discontinued in 1876. The alum huts were largely demolished and their stones and a. used for the first, meanwhile replaced church in Niederholtorf .
literature
- Friedrich Falk: A forgotten Rhenish lignite mining area. Lignite mining underground on the northern slopes of the Siebengebirge , Rheinlandia Verlag 2002, 362 pages, ISBN 3-935005-51-2
- Chr. R. Halm: The alum pits on the Hardt . In: Vom Rhein zur Ahr, 3, 1949, p. 35 ff.
- Theodor Kiesel: The lignite and alum industry on the Ennerthardt and its founder Leopold Bleibtreu . In: Herrschaft .... Küdinghoven, Chronik der Ennert-Orte, 1, pp. 68–73.
Web links
- Showcase Bonn: The Ennert, an "invisible" industrial monument
- Horst Wolfgarten: Our closer home, the largest contiguous mining area for lignite around the middle of the 19th century
Individual evidence
- ↑ Conservation plan Bonn-Beuel
- ↑ Monument and History Association Bonn rrh .: History trail lignite + alum with display boards (accessed August 6, 2019)