| Paulin Talabot - Engineer and contractor | Designer of the line and pavilions. |
| Maréchal Soult - Minister and investor | Initial political and financial support. |
| Charles Didion - Partner of Talabot | Technical and operational collaborator. |
| Georges Stephenson - British engineer | Technical adviser during work. |
| Eugène Abric - Mining contractor | Partner in the dealership. |
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