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Water
Dikes, dams & hydraulic structures

Rebuilding of the Apremont dam

Design and work supervision - Impact assessment - Water law file - Geotechnical and underwater investigations
    Customer
    VNF – Voies Navigable de France (French Waterways Company)
    Amount of work
    3,8 M€
    Place
    Apremont

    Types of services

    Design and work supervision. Impact assessment Water law file Geotechnical and underwater investigations

    The project involved rebuilding the Apremont “needle” dam on the Saône in the Haute-Saône district near Gray.

    Built in 1860 and then modernized from 1982 to 1984, the Apremont dam constitutes a retaining reservoir to supply a diversion canal (navigable) whose entrance is located about 200m upstream from the dam.

    This dam consists of a fixed part 55m long (spillway) and a mobile part (needle dam) 51m long with 4 passes of 12m. A hydroelectric plant is located on the right bank.

    The purpose of the project is to:

    • to replace the existing “needle” dam with a functional and automated structure (2 main passes of 21m – flap gate solution and “Obermeyer” type hydro-gates solution),
    • realize the restoration of the spillway, the existing structures of the dam which will remain in place and the protection against scouring,
    • to build a fish pass of the 10 successive basins type, adjoining the right-hand side,
    • to build an eel pass and a canoe pass,
    • the construction of a dual-use footbridge, public and technical, on the dam.

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    Water
    Dikes, dams & hydraulic structures

    Rhine dikes

    Strasbourg
    Project management during works execution
      Customer
      EDF - CIH
      Place
      Strasbourg - Gerstheim - Rhinau - Marckolsheim

      Types of services

      Project management during works execution

      EDF is the operator of the hydroelectric plants on the Rhine bays of Marckolsheim, Rhinau, Gerstheim and Strasbourg and, as consequence, in charge of the maintenance and upkeep of the banks on these reaches.

      The work carried out consisted in protecting the internal side of the dikes, by preventing erosion by installing new riprap in order to:

      • restore mechanical protection in weakened areas;
      • re-establish banks with regular profiles (below and above the water level).

      The underwater works were carried out from a floating pontoon equipped with a mechanical shovel. The external works were carried out from the crest of the dike.

      The works lasted three years, on the left and right banks (on the German side).

      To check and validate the works and define the work to come, the water level was lowered by about 1 m at the end of 2010

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      • © Société du Canal Seine Nord Europe
      Water
      Dikes, dams & hydraulic structures

      Canal Seine Nord

      Preliminary and final design, works supervision
        Customer
        Canal Seine Nord-Europe
        Partner(s)
        Egis, ISL, SBE
        NEY, MDP
        Place
        Compiègne
        Awards
        BIM d'argent

        Types of services

        Project management

        Ingerop is in charge of the BIM project management of lots 2 and 4 within an engineering grouping, for a 25% share of the fees.

        The missions handled by Ingérop are:

        • Design (feasibility studies, final design, assistance to the client at work contract phase)
        • Supervision of the works
        • Preparation of the environmental authorisation dossier
        • Eco-design
        • Project management (management of interfaces, costs, deadlines and risks, consultation)

         

        The technical subjects handled directly by Ingérop concern:

        • Layout of the canal and the restorations
        • Earthworks (large earthworks) and related earth movement (problems of large earth surpluses)
        • Engineering structures (canal bridges, bowstring bridges, double girders, PICF, etc.)
        • Network re-establishment

        BIM coordination

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        • Lomati Dam
        Water
        Dikes, dams & hydraulic structures

        Lomati Dam

        Preliminary, final and construction design, works supervision
          Customer
          Ehlanzeni District Municipality – Piet du Toit
          Partner(s)
          AWA Construction
          Knighthall Hendry
          Place
          South Africa

          Types of services

          Repair and refurbishment for future upgrade of Lomati dam

          Repair and refurbishment of 120m of 500mm diameter outlet pipe. Slope stabilization of 2500m2 vertical cliff face over spillway. Raise the existing lay core of the dam by 2.5m in order to comply with dam safety requirements.

          Ingeop South Africa have been involved from the application of funding from the MWIG to the preliminary and final design and finally up to construction supervision stage of the repair and refurbishment works to Lomati Dam. Investigation into the repair and refurbishment works began as far back as 2008, with construction commencing in November 2013. Once the dam safety requirements of Lomati Dam have been met, ISA will commence work investigating the raising of the dam wall in order to increase the dam yield. This will involve the possible use of fuse-gates at the existing spillway.

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