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Changes to the estimation of extreme rainfall events resulted in significant increases in the estimates of the PMF since the original design of Wivenhoe Dam. To upgrade the dam to meet these new requirements, SEQWater (owner and operator) formed an Alliance with Leighton Contractors, Coffey Geosciences, MWH and the NSW Department of Commerce.

The option selected for the upgrade works included the construction of a new secondary spillway, upgrade of the existing gravity section, radial-gated spillway, and strengthening of the dam crest.
Value management was key throughout the project ensuring the Alliance was continually looking to
improve practices, increase cost-effectiveness and create innovative solutions for design elements of the project.
On numerous occasions when the design was challenged, the Alliance made ‘best for project’ decisions to carry out additional investigations or design work to pursue alternatives. As an example, the powerful tool of Computational Fluid Dynamics was used in the analysis and design of flow deflector plates on the existing spillway, which were an alternative to the originally designed gate locking pins. The investigation and development of this alternative resulted in significant cost savings and a more effective design solution.
This paper presents aspects of the design carried out by the Wivenhoe Alliance, lessons learned, and the way continual investigations during construction provided value for money solutions.

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  • $15.00
    2005  Papers

    2005 – INVESTIGATION TO PURSUE INNOVATION

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  • $15.00
    2005  Papers

    2005 – Investigation to Pursue Innovation

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  • $15.00
    2017  Papers

    2017 – Impact of Detailed Consequence Assessment on Leslie Harrison Dam Upgrade Works

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  • $15.00
    2017  Papers

    2017 – Seqwater Dam Improvement Program – Assessment, Prioritisation, Justification and Implementation of Dam Upgrades

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  • $15.00
    2018  Papers

    2018 – Exploring the Potential of Advanced Instrumentation in Physical Hydraulic Modelling for Spillway Design

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  • $15.00
    2014  Papers

    2014 – Adapting Water Supply Dams for Flood Mitigation and the Complexities Associated

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  • $15.00
    2012  Papers

    2012 – North Pine Dam – January 2011 Flood of Record Lessons Learned

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