Nordfeld Consolidated Coal Mine

The Nordfeld Consolidated Coal Mine 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. It existed from 1889 and 1905 in the Pfaffen Woods on the northern slope of Höcherberg 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.

Source: Wikipedia