The limits of the Ronchamp basin were not yet known,[5] and the new mine was located 1.4 kilometres (0.87 mi) to the west, at the foot of Bourlémont.

[7] Two years later, the hoist was replaced with a machine taken from the Notre-Dame mine, which had a steam break, gears, and a spool shaft.

[7][8] In January 1868 an extraction cage detached and damaged the guide ropes, which led to a two-week layoff for the miners.

[7] On 24 January 1868, the mine suffered a firedamp explosion that left eight dead and damaged 250 metres (820 ft) of its structural timbers.

[10] It had been planned that the headframe should be demolished, but because of strong community attachment to it as part of their heritage, it was saved in 1972 by Dr. Marcel Maulini, who went on to establish a museum of mining in Ronchamp.