About
The Dutch State Mine (DSM) Emma, in Dutch Staatsmijn Emma, was a coal mine located in Treebeek, Heerlen run by the Dutch state through its company DSM. The mine was in operation from 1911 until 1973. It was the second-largest mine in the Netherlands, but it had the highest production of all Dutch mines at 109 megatonnes. Its deepest shaft III was 980 metres (3,220 ft) deep. After the 1963 merger with the DSM Hendrik the deepest shaft was 1,058 metres (3,471 ft) deep.
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