Amplification and acceleration of the action of the Conservatoire du littoral for the preservation of four major lake entities by the creation of a regional operational officer of the Conservatoire du littoral. According to the strategy defined by the Lacs delegation and its Lacs du Grand Est mission manager: Implementation of the updated long-term strategy (negotiation and land acquisition). Preparation, realization and follow-up of works of requalification and restoration of natural environments. Preparation, implementation and follow-up of reception and public awareness work. Development of a management plan for each site of the Conservatoire du littoral. Accompaniment of site managers and supervision of uses within the limits of the sensitivity of the environments. Organization of a management committee by large lake entities. Discussions with partners to integrate the action of the Conservatoire du littoral into local and national strategies (ENS, RAMSAR, SNAP...). Development of communication materials and actions.