This Time Window is located on the site of the former Willem-Sophia mine. This mine owes its name to King William III and his wife Sophie of Württemberg.
This private mine was owned by the Belgian 'Société Anonyme des Charbonnages néerlandais Willem et Sophia'. The mine could be put into operation in 1902, thanks to a new technique for the Netherlands.
The so-called freezing method made it possible for the first time to deepen shafts in the wet soil of Spekholzerheide. Ultimately, the mine had five shafts and delivered a total of 22.5 million tons of coal from 1902 to April 17, 1970.
The slag heap has been burning for over thirty years because of the dumping of the coal waste from the mine's furnaces. After the mine closed, the mine stone, which had turned red as a result of the combustion, was ground. This so-called 'Wisosplit' was used, among other things, on athletics tracks. The product name comes from the name of the mine.
This text has been automatically translated using an online translation service.
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