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. It has a section of 70 × 50 cm and is 1.3 km long. It was supplied by the Henri IV shaft and the Clocher adit. Other mines were opened in the area around 1950. In 1997, the historical mining circuit of the outcrops was created and the exit of the channel was included as a point of interest, together with a more recent dewatering adit. At the beginning of the 21st century, the site was redesigned and a nearby adit that was discovered at the time was restored.

Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).