Infrastructure branch Making all the difference

The hydro structures specialist

Eiffage Génie Civil's Hydro Division is active in France and worldwide for our public and private clients. On Reunion Island, in Mayotte, the French Caribbean, Seychelles and Mauritius, we operate under the Hydrotech and TWS brand names.

  • EXPERTISE

    Our clients appreciate our know-how and responsiveness.

  • ADAPTABILITY

    We adjust our operations to suit the size of your project.

  • ENGINEERING

    The complementarity of our integrated design and engineering department and on-site operations is one of our major strengths.

Hydro operations

  • Water treatment (transfer, purification, sea water desalination)
  • Waste, rain and industrial  water treatment
  • Network construction and repair
  • Irrigation and  flood management
  • Leak monitoring
  • Reservoir construction and equipment
  • Piping
  • Electricity
  • Monitoring & control

Services

  • Research, construction, commissioning
  • Operations and maintenance

Hydro Structures

  • Pumping, treatment and purification
  • Equipment for hydropower plants (penstock pipes, headrace tunnels)
  • Reservoirs
  • Locks (gates & valves)
  • Dams (water retention and storage, spillways)
  • Swimming pools and leisure facilities
  • Whitewater stadiums

SUCCESSFUL HYDRO ENGINEERING PROJECTS

  • FLOOD PEAK REDUCTION PUMPING PLANT
    FLOOD PEAK REDUCTION PUMPING PLANT

    Design and build project for an anti-flooding system at the Legend Golf Course, Mauritius.

  • WATER PURIFICATION PLANT
    WATER PURIFICATION PLANT

    We upgraded the Bretagne water purification plant on Reunion island including filtration, lamella settling,  pumps, automation, and instrumentation and electrical equipment.

  • COLLECTION POND
    COLLECTION POND

    We supplied, installed and commissioned equipment for the Maquis de Saffré collection ponds in Nantes, including check and control valves, screens, drainage and bilge pumps, vacuum cleaning, ventilation, electricity and automation.

  • DN 700 CAST IRON WATER MAIN
    DN 700 CAST IRON WATER MAIN

    We supplied and laid 10 km of DN 700 cast-iron water pipes, involving two 65 m microtunnelled crossings with an MTBM diameter of DN 1200 and horizontal DN 1200-diameter drilling over 50 m between Nantes and Saint Nazaire (Carene).

  • DIVERTING RAW WATER NETWORKS
    DIVERTING RAW WATER NETWORKS

    We laid 800 m of cast-iron (DN 1200) and steel (DN 800) water pipes in deep trenches and connected them to the networks in service at the future Abymes University Hospital in Guadeloupe.

  • WASTE WATER PUMPING PLANT
    WASTE WATER PUMPING PLANT

    We renovated Pont Rousseau waste water pumping plant in Nantes, supplying and installing equipment including electric submersible pumps (ESP), suction and discharge piping, surge tanks, activated carbon filters for deodorization, sliding wall penstocks, magnetic flow meters,  a low-voltage distribution panel cabinet, automation and remote management.

  • WATER TREATMENT PLANTS
    WATER TREATMENT PLANTS

    We supply, install and commission blowers and air diffusion units in water treatment plants.

See also