Ronchamp coal mines adit
The Ronchamp coal mines adit is a large drainage channel with brick walls at the mines of the same name. It was used to drain the mine water between 1783 and 1840.
The Ronchamp coal mines adit is a large drainage channel with brick walls at the mines of the same name. It was used to drain the mine water between 1783 and 1840.
The Ronchamp coal mines adit is a large drainage channel with brick walls at the mines of the same name. It was used to drain the mine water between 1783 and 1840.
Source: Wikipedia "Ronchamp coal mines adit" · CC BY-SA 4.0
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