In order to market the soapstone mined in the quarry, he converted it into talc at a chemical factory in Prades in Poudre Chefdebien, which was used to treat vine diseases.

The first rails were delivered in numbered packages at the end of September 1885, to make the assembly as easy as possible, just like with a Meccano set.

The route was to reach Cobazet at a rate of 300 metres (330 yd) per day by 15 June 1886 at the latest, despite delays caused by heavy rainfall.

[1] After the commissioning of an aerial cableway, with which the swap-bodies of the tipper wagons could be transported, the Decauville railway line was shortened to a length of 7 kilometres (4.3 mi).

[1] The Decauville locomotive Stéatite, which was bought by the Baron from a third party, found it difficult to pull the empty wagons uphill in the arid area.