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The Ross River Dam, designed in the early seventies, does not meet current dam safety criteria for overtopping and piping within the embankment or the foundation. The dam comprises a 40m long concrete overflow spillway flanked by a central core rockfill embankment of 130 m on the right bank and 170m on the left bank with a 7620 m long left bank earth fill embankment, which has no internal filter zones for piping protection. The embankment was extensively assessed and treated forfoundation deficiencies in 1982, and further assessed in 20002002 for appropriate upgrade options.
This paper describes the process of validation of the detailed design using Risk Based Design Criteria. This process included data mining for historical performance and original design intention,
comparison of the original design against current and historical investigations and assessment of the upgrades using the large volume of data available from previous work. A design team comprising specialist hydrologists, hydrogeologists, geologists, geotechnical and dams engineers worked within a risk assessment framework at all stages of the design to ensure the design was validated using the design Validation Model. This process incorporated assessment of crest level based on flood risk and wave overtopping, review of 2D and 3D seepage models to assess piping and foundation erosion potential, assessment of fissured soils within the embankment foundation for structural stability and evaluation of spillway model testing for potential spillway failure modes.

Now showing 1–12 of 14 search results:

  • $15.00
    2005  Papers

    2005 – Use of Risk Based Design Validation for Justification of the Ross River Dam Upgrades

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    2005  Papers

    2005 – Use of Risk Based Design Validation for Justification of the Ross River Dam Upgrades

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    2006  Papers

    2006 – ALARP Considerations for Dam Safety – Are We There Yet?

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    2006  Papers

    2006 – Failure Modes Analysis as Applied at Rocklands Dam

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    2006  Papers

    2006 – Ross River Dam Spillway Gate Reliability and the Impact on the Design

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    2016  Papers

    2016 – Kangaroo Creek Dam Embankment Raising and Stabilisation – Balancing Competing Objectives

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    2016  Papers

    2016 – Root Cause Analysis (RCA) in Dam Design

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    2016  Papers

    2016 – Would Bowties and Critical Controls Contribute to the Prevention of High Consequence / Low Frequency Dam Failures?

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    2017  Papers

    2017 – Application of Risk Assessment to an Emergency Levee Design in an Urban Environment

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    2017  Papers

    2017 – Construction Flood Risk Strategies for Dam Upgrades

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    2013  Papers

    2013 – Maroon Dam: A multi-analytical approach for a multi-purpose dam

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    2008  Papers

    2008 – Risk assessment in spillway remedial works design and construction and monitoring at Googong Dam

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    2011  Papers

    2011 – Awoonga Dam Acceptable Flood Capacity design – the anguish of erosion risk and implications for design

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    2011  Papers

    2011 – Where is our Weir going – an Unusual Upgrade!

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