Staatsmijn Emma

The Staatsmijn Emma was a Dutch coal mine located in Treebeek (now part of Brunssum) and Hoensbroek (now part of Heerlen). The mine was in operation from 1911 till 1973.
The second-largest mine in the Netherlands, it had the highest production of all Dutch mines at .
The deepest shaft was deep, although after integration with Staatsmijn Hendrik the deepest shaft was deep.