Hans Joachim Langelüttich:
Dewatering of Mansfeld copper slate mines
Starting with hydrogeological conditions of the copper slate deposit from the Zechstein period in the south-eastern Harz foothills, the article describes how the inflow of mine water was handled during mining from the 13th century up to 1990. Major events were in 1785 the installation and operation of the first steam engine designed and produced in Germany as well as the handling of cavity water entering at a rate of up to 2,000 m³/min and totalling 171 million m³ between 1884 and 1958. Finally, there is a description of the preservation and flooding of workings in the Mansfeld basin from 1970 and the Sangerhäuser area from 1990 as well as the consequences detected until now.