In 1906 the coal mine Zeche Hermann was established, transferring coal from 1,200 m under underground. The coal miners and their families lived in the Beifang quarter, which had in the origin a very rural landscape. The number of inhabitants increased from 2,000 to 10,000 in only one year, with c. 3,500 coal miners working at the plant. In 1926 the coal mine was closed.
