Customer
Collectivité Eau du Bassin Rennais Place
Guenroc and Plouasne, Côtes-d'Armor department, Brittany region Types of services
The hazard study carried out in 2020 by the Geos office concluded that the upstream waterproofing of the empty reservoir dam must be restored in the medium term. In 2021, the CEBR decided to undertake studies to program the work integrating environmental and drinking water supply constraints. This work, for which Geos and Ingerop is the project manager, began in 2024 and includes:
- A preliminary phase of emptying the reservoir accompanied by dredging of the sediments;
- Rehabilitation work with drained reservoir, including the installation of a waterproofing geomembrane on the upstream facing of the dam, and the rehabilitation of the hydromechanical equipment of the bottom drain;
- The filling of the reservoir and the continuation of work on the ridge and downstream of the dam, including the resumption of civil engineering disorders.
