The operation, carried out by VNF, consists of a series of remodeling of the navigation spikes in order to restore the area of freedom to the Loire and better connect the river annexes and secondary arms to the main arm. This remodeling also allows the release of sediments so that they can be carried away by the flow of the Loire and deposited downstream, especially where the bed of the Loire has dug too much. This remodelling is implemented in sectors A. The operation is eligible for action 13 of the ERDF Loire POI.