Nordfeld Consolidated Coal Mine
Germany
The Nordfeld Consolidated Coal Mine (Steinkohlenbergwerk Consolidirtes Nordfeld, or Grube Nordfeld) was a large-scale but ultimately short-lived and unsuccessful German mining operation on the border of the present-day states of Saarland and Rhineland-Palatinate (Rheinland-Pfalz). It existed from 1889 and 1905 in the Pfaffen Woods (Pfaffenwald) on the northern slope of Höcherberg (Mt. Höcher) in the vicinity of the Saarland town of Höchen and the Rheinland-Pfalz towns of Waldmohr and Dunzweiler. The mine's second shaft, named "Wilhelmine," was the deepest in the entire Saar area at the time.
Mine data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).