Hansa potash plant
| Hansa potash plant | |||
|---|---|---|---|
| General information about the mine | |||
 |
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| other names | Empelde potash plant | ||
| Mining technology | Underground mining | ||
| Information about the mining company | |||
| Operating company | Union of Hansa-Silberberg / Salzdetfurth AG / Kali und Salz AG | ||
| Employees | Max. 1105 | ||
| Start of operation | 1896 | ||
| End of operation | 1973 | ||
| Successor use | Town hall, museum, rubble / excavation landfill, natural gas storage facility | ||
| Funded raw materials | |||
| Degradation of | Potash salt | ||
| Greatest depth | 1051 m | ||
| Geographical location | |||
| Coordinates | 52 ° 20 '45.6 " N , 9 ° 38' 46.8" E | ||
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| Location | Empelde | ||
| local community | Ronnenberg | ||
| country | State of Lower Saxony | ||
| Country | Germany | ||
The Hansa potash plant , often also called Empelde potash plant , is a former potash salt mine in the Ronnenberg district of Empelde in the Hanover region . In 1950 the plant and its three shafts employed a total of over 1100 people.
geography
The plant was located between the Benther Berg and the town of Empelde in the area of the Benther salt dome . This stretches around 8 km in length from the Ronnenberg district of Weetzen between Ronnenberg, Benthe , Empelde to the Hanover districts of Badenstedt and Davenstedt .
geology
The salts of the Benther salt dome were deposited from the sea water in the Zechstein Age , 250 to 230 million years ago. The formerly flat layers were tectonically arched about 160 million years ago to above today's ground level. The potash and rock salts in the upper areas were dissolved by environmental influences, so that today's salt level is about 100 to 150 m below the surface of the earth.
history
Salt was already being extracted 1100 years ago from springs in the Empelde area that later dried up. However, this received little attention until the construction of the Egestorffshall salt works in the village of Badenstedt began in the 1830s . It turned out that the salt yield increased by processing brine from boreholes compared to processing surface water.
Since 1894, deep drilling has been carried out in the area of the Benther salt dome, which encountered salt deposits that appeared to be worthwhile. On November 7, 1896, the Hansa-Silberberg union began to sink the Hansa I shaft near the village of Empelde. By 1907 a depth of 614 m had been reached and production started in April 1908. In the first year of production, 155 employees extracted 11,500 t of potash salt. Hansa Empelde was larger than the Ronnenberg potash works in terms of the output. In the course of its history it has developed into a top plant in the potash mining industry in Lower Saxony. The salt was mainly mined in the northern half of the Benther salt dome - to below the Hanover-Badenstedt location.
From 1911 to 1921, interrupted by the First World War , the Hansa II shaft was sunk to a depth of 601 m. Production increased. In 1930 z. B. 601 employees produced 234,600 t.
The plant was now part of Salzdetfurth AG and took over the potash mining rights in the northern part of the Benthe district from the competing Ronnenberg potash plant . As a result, the Hansa III shaft was sunk from 1936, which further increased the number of employees and the output. The annual record was 736,100 t in 1940.
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After the Second World War , production no longer reached the previous levels. From 1948, however, shafts II and III were sunk further, with the number of employees increasing to 1105 in 1950 and in 1959 the Hansa III shaft with a depth of 1051 m was the deepest potash shaft in Germany.
In the 1960s, production gradually declined. The plant, which in the meantime belonged to Kali und Salz AG , was closed on September 15, 1973 for economic reasons.
Successor use
In 1978 the company premises were sold to the city of Ronnenberg. The shafts were filled with gravel and crushed stone until 1983, and the mine building was flooded with brine that was generated when the natural gas storage caverns that were created in the salt dome were drained out.
The administration building on Hansastrasse now serves as the town hall of Ronnenberg
The overburden dump , which consists of 90% rock salt and is around 4 million m 3 in size , was covered with a further 4 million m 3 of rubble and excavated earth , the height being increased to around 75 m. A large part of the heap has already been planted with grass and trees. The aim was, among other things, to reduce the amount of salt flushed out of the dump, with the costs of the coating being borne by the landfill revenues. Cultural events are occasionally held on and around the heap.
The Empelde outdoor pool is a remnant of the potash plant, even if it no longer provides hot water as it used to.
The Lower Saxony Museum for Potash and Salt Mining, opened in 1996, provides information about the history of salt mining - especially in Empelde .
Factory track
The plant had its own railway to Ronnenberg station. A T 3 operated from 1920 to 1948 is located in the depot of the Museum Buurtspoorweg in Boekelo . A steam storage locomotive , which was used for a few years from 1949, is a memorial at Euskirchen station , two diesel locomotives of the types MaK 240 B and 240 C can be found in the inventory of the Hanover Factory Railway Museum at the Aschersleben site .
In addition to the potash transport, a locomotive with passenger cars ran between the potash works and Wennigsen (Deister) station as a works train at shift change until autumn 1967 .
Web links
- Lars Baumgarten: The potash u. Rock salt pits in Germany - 4.8 Hansa. In: lars-baumgarten.de. Retrieved June 10, 2018 .
supporting documents
- ↑ a b c d e f g Hansa plant in Empelde. Lower Saxony Museum for Potash and Salt Mining, accessed on December 5, 2015 .
- ↑ a b c d e Konrad Boden: Potash mining in the Benther salt dome, in: Peter Hertel et al. (Ed.): Ronnenberg. Seven Traditions - One City . Ronnenberg 2010, ISBN 978-3-00-030253-4 , pp. 122-134 .
- ↑ Konrad Boden: Potash salt mining in Ronnenberg: How did salt come about? Ronnenberg local history museum, accessed on December 5, 2015 .
- ↑ A little salt story. Lower Saxony Museum for Potash and Salt Mining, accessed on December 5, 2015 .
- ↑ Empelde and the salt. Lower Saxony Museum for Potash and Salt Mining, accessed on December 5, 2015 .
- ^ A b Konrad Boden: Potash salt mining in Ronnenberg: Historical outline. Ronnenberg local history museum, accessed on December 5, 2015 .
- ↑ Konrad Boden: Potash mining in Ronnenberg: From the Hermann shaft to the Benthe salt works. Ronnenberg local history museum, accessed on December 5, 2015 .
- ↑ Caverns. Lower Saxony Museum for Potash and Salt Mining, accessed on December 5, 2015 .
- ↑ Julia Ockenga: MINING IN RONNENBERG. on: geschichtsatlas.de. Retrieved December 5, 2015 .
- ↑ Uwe Repinski: About caverns and a recreation area. Metamorphosed Kilimanjaro, in: Peter Hertel and others: Ronnenberg. Seven Traditions - One City . Ronnenberg 2010, ISBN 978-3-00-030253-4 , pp. 236-239 .
- ^ Edzard Schönrock: Salt mountain becomes natural mountain. (PDF; 999 kB) Excerpt from: Heimatland. Journal for local history, nature conservation, cultural care. Hanover 2009, pp. 57-59. (No longer available online.) Heimatbund Niedersachsen eV, archived from the original on December 29, 2009 ; Retrieved December 5, 2015 .
- ↑ Empelde outdoor swimming pool. City of Ronnenberg / Region Hannover, accessed on December 5, 2015 .
- ^ The Lower Saxony Potash and Salt Mining Museum in Empelde. Lower Saxony Museum for Potash and Salt Mining, accessed on December 5, 2015 .
- ^ Locomotive 3 van Museum Buurtspoorweg (MBS) , accessed on March 2, 2018
- ↑ Henschel locomotives preserved in a museum. (FNr. 27008). www.werkbahn.de, accessed on August 11, 2016 .
- ^ Deutsches Werkbahnmuseum Hannover eV (DWBM). www.privat-bahn.de, accessed on August 11, 2016 .
- ↑ www.deisterstrecke.de: Zeittafel , Memento from May 28, 2018 in the web archive