of the Rennes Basin
Types of services
The hazard study carried out in 2020 by Ingerop revealed the need to reinforce the upstream waterproofing of the empty reservoir dam. In 2021, the CEBR launched a work schedule that incorporates environmental requirements and drinking water needs. Ingerop is managing the execution of this work, which began in 2024.
The project is structured around an initial phase of draining the reservoir, followed by dredging of the sediments. Next, the rehabilitation work takes place with the reservoir drained, notably including the installation of a waterproof geomembrane on the upstream face of the dam and the rehabilitation of the hydromechanical equipment.
The work continues with the refilling of the reservoir and the repair of the civil engineering defects.
