Lead Organisation SEENEOH
Country France
Type Tidal
  • Type of Testing Tidal
    Year Established 2017
    Temperate/Tropical Temperate
    Commercial/Array/Full scale/Scale
    Development Status Operational


    The site is located in the Garonne, downstream from the Pierre de Pierre bridge in Bordeaux, 100 kilometres away from the mouth of the Gironde estuary. It is exposed to major currents influenced by the diurnal tidal cycle of the Bay of Biscay and by the flow of freshwater rivers from the Garonne and Pyrenees catchment area.
    SEENEOH is operated by a team made of 4 companies specialised in one of the key sectors of tidal energy project: environmental monitoring (Energie de la Lune), mechanical engineering (Cerenis), Electricity production and communication (Valorem), Safety and security (Valemo), administrative and finance (SEML).
  • Number of Berths 1 to 3
    Water Depth from 4 to 14,5 m LAT
    Min Water Depth (m) 4
    Max Water Depth (m) 14.5
    Avg Water Depth (m)
    Annual mean significant wave height
    Maximum recorded wave height 0.6 m
    Mean (averaged current speed) 2.6 - 3.5 m/s
    Maximum current speed
    Maximum tidal range 5.8 m
    Mean wind speed 2 m/s
    Max wind speed
    Seabed type sand and mud
    Total test area (km2) 0.07
    Distance to land 250 m
    Grid connected Y
    Grid connection capacity 250 kW
    Rated export capacity and connection 100 kW
    Proximity to nearest harbour (km) 2 km
  • Demonstration Projects

    R&D Projects


    Grid connection:
    Supply vessel

    Equipment available to support site deployments

    Multibeam echo sounder

    Services of test programmes offered on site

    Environmental monitoring:

    • Bathymetry
    • Currents
    • Turbulence analysis
    • Passive underwater acoustics
    • Real-time provision of environmental and technical data
    • Electro-magnetism
    • Mechanical & nautical
    • Project review
    • Structural dimensioning
    • Platform and anchor design and manufacture
    • Energetic performance monitoring
    • Monitoring and analysis of electrical production
    • Certification of the power curve according to IEC 62 600-200 standard
    • Grid connexion safety certification
    • Operation and maintenance
    • Security supervision 24/7
    • Light maintenance operations
    • Supply vessels for operation and transport (technical teams and light equipment)

    Key supply chain companies in the region