At the beginning of the 21st century, many remnants of these facilities (ruins, a large concrete hopper, converted buildings, and two imposing spoil tips) remain.

Following restoration, the 120 hp[4] Sainte-Pauline[2] shaft winding engine was installed on the site, using special aloe wire ropes.

[2] The recette jour building was installed more than six meters above ground level, as evidenced by old postcards, plans, and the wide stone wall visible until 2014.

In 1928, an assembly was dug to the Sainte Marie Coal Mine, and in 1929, the 1,500-meter-long "Cameroun" bowette (rock tunnel) linked it to the Notre-Dame shaft.

[8]When the French coal industry was nationalized in 1946, under the impetus of the Provisional Government led initially by Charles de Gaulle, the Ronchamp coalfield was entrusted to Électricité de France (EDF), as it was too far from the other major coalfields and included a major thermal power station.

The power station was operated by the Ronchamp coal mines from its construction between 1906 and 1907 until its nationalization in 1946, when it became the property of Électricité de France until its closure in 1958.

[18]The mining company town was built, in 1919, after World War I, initially to accommodate troops, before being used between 1923 and 1925 to house Polish immigrants.

On May 17, 2010, the Prefect of Haute-Saône authorized the exploitation of the slag heap's shales as a quarry by the limited company GDFC (granulats de Franche-Comté), on condition that the protected natural environments remain intact and that the historic sites are respected (certain slag heaps, buildings and the concrete hopper).

[29]The spoil tips contain numerous fossils dating back to the Carboniferous period, and are unique because they group together plants living in a dry, mountain environment (Blackthorn, Ferns, Cordaites, and the first flowering plants, which are only found in the most recent layers) and in marshy lowland environments (Lepidodendron buttercup, Sigillaria, Calamites, Sphenophyllum), as well as freshwater fish.

In the early 2000s, the SMPM association carried out an inventory of the mycoflora on the Chanois slag heaps area, which had been overtaken by birch and willow, discovering several rare species such as Pisolithus arhizus, Lactarius fuscus, and Stropharia rugosoannulata, demonstrating the importance of conserving these slag heaps.

On June 19, 2007, the Ronchamp town council officially announced the conservation of the north-western section of the Plaine du Chanois slag heaps and those of the Etançon mine shaft.

[31][32] At the same time, the non-vegetated part of the site (nicknamed the "crassier") is regularly used for motocross, but this is prohibited by the Ronchamp town council due to the noise pollution it causes, offenders risk a €135 fine and confiscation of the motorcycle and its transport vehicle.

[33]From 2013 to 2014, the Rahin et Chérimont Community of Communes built a reception area for Travellers to the northeast of the remaining slag heaps, next to the former coking plant.

The project comprises a total of 9,256 potential modules with a maximum output of 4.99 MWp, enough to cover the electricity consumption of 3,480 inhabitants.