Exploitation of the rainwater works of La Roche-sur-Yon Agglomeration consisting of 385 km of network and 95 retention basins in the territory of La Roche-sur-Yon, Mouilleron-le-Captif and the delegated commune of Les Clouzeaux (lot 1). Then, 236 km and 90 reservoirs in the municipalities of La Chaize-le-Vicomte, Dompierre-sur-Yon, La Ferrière, Fougeré, Landeronde, Nesmy, Rives-de-l'Yon, Thorigny, Le Tabrier, Venansault and the delegated commune of Aubigny (lot 2).

Operation of the stormwater works of La Roche-sur-Yon Agglomeration consisting of 385 km of network and 95 retention basins, including 74 aerial and 21 buried, in the territory of La Roche-sur-Yon, Mouilleron-le-Captif and the commune delegated Les Clouzeaux.

Exploitation of the rainwater works of La Roche-sur-Yon consisting of 236 km and 90 retention basins, including six buried and 84 aerial, in the eleven communes of municipalities of La Chaize-le-Vicomte, Dompierre-sur-Yon, La Ferrière, Fougeré, Landeronde, Nesmy, Rives-de-l'Yon, Thorigny, Le Tablier, Venansault and the delegate commune Aubigny.