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Hazelmere dam raising

South Africa
Preliminary, final and construction design, works supervision
    Department of water affairs
    Mechanical-Electrical Directorate
    KHH for geotechnical works>br/>Nemai for environmental work
    South Africa

    Types of services

    Preliminary, final and construction design, works supervision
    Dam heightening and new spilway (piano key weir type)

    Ingérop South Africa (ISA) was appointed by Department of Water Affairs (DWA), to attend to the project for the raising of the Hazelmere Dam in KwaZulu-Natal.

    The Raising of the Hazelmere Dam consists of the Design, Manufacture and Installation of Crest Gates and associated infrastructure. The project includes civil works to ensure the overall stability of the dam wall and provision for emergency overflow in case the gates do not open on time.

    Description of Actual Services Provided by Ingérop South Africa Staff:

    An investigation will be carried out to compare the different gate alternatives, namely radial gates or wheel type vertical gates, and to determine the best solution for Hazelmere. The Dam structure and its stability will be analysed. It will also be necessary to carry out an investigation to determine the extent and characteristics of the grout curtain below the spillway and NOC structures. Pressure relief holes and associated drainage will have to be checked and provided in cases where the existing systems have become blocked and / or ineffective.

    • All existing structures that are visible to the human eye will be inspected in detail to establish the condition in view of the required changes that will be evaluated.
    • With regards to Environmental Management, in accordance with the ROD a number of matters need to be dealt with.
    • Coordination of the Mechanical and Electrical Engineering contractor.
    • Assistance in bid and bid evaluation
    • Escalating the Tender Design, as finally defined in the approved Tender Design Report, to Detailed Design standard as well as the production of all drawings required for Construction stage.
    • Design standards of SANCOLD the South African leg of ICOLD are used.
    • Construction Monitoring.
    • Throughout all the above processes, as well as the ensuing phases of Commissioning and Assessment and Close-Out, we will maintain a Professional Project Management service over all aspects of the project.
    • The Commissioning process will be written into the contract for both the civil / structural contractor as well as the nominated gate contractor and the process of commissioning will be carried out under the supervision of the Resident Engineer and his staff.
    • During the whole of the life of the Project, under the direction of the APP, the respective design and construction teams will record relevant data for compilation into the final close-out report as well as the Operation and Maintenance Manual.
    • During the closing stages of the work the APP will be responsible for the editing of the information into the final format for presentation to the Client.
    • After review of the documents the final drafts will be presented to DWA and the project will be closed.


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