Between October 2016 and June 2017, teams from Colas Centre-Ouest’s Guingamp and Côte d’Émeraude profit centers were mobilized in the port of Saint-Malo to carry out extension work on the Lamennais quayside.
Created a few years ago with dredging sand taken from the port’s various basins, the zone, covering an area of almost 20,000 m2, has been turned into a storage area to accompany the development of the site’s activities. The project involved earthworks, specific structures, deep networks, soil treatment and the application of mixes. Teams were faced with two major challenges, namely the heavily polluted nature of the excavated materials, laden with chloride, and the management of the water table level, regulated by locks. Colas, working closely with the harbor master and the chamber of commerce, was able to install the rainwater control and hydrocarbon separation structures, under the guidance of Colas’ Campus for Science and Techniques. Bouygues Energies and Services contributed its expertise for the lighting across the site.