Zeche am wasser was active till june 2008 and was the last productive kohlmine in this region. The mine openend in 1927 but was flooded in the beginning and in 1930 it reopened. It produced 3 mil tons a year in 1968.
http://www.heeftmeer.nl/index.php?id=141
http://www.heeftmeer.nl/index.php?id=141
