The Life4fish project aims at facilitating the salmon and eels downstream migration across 6 hydraulic structures sites along the Belgian Lower Meuse. The project includes the characterization of fish populations and downstream migration routes along the Lower Meuse River as well as the design, installation, operation and monitoring of innovative solutions to facilitate passage through the hydropower facilities. The tested solutions consist in specific technologies (behavioral barriers, fish passages) and new hydropower control strategies accounting for the downstream migration process.