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Tank Hill Reservoir is located approximately 25km north-east of Warrnambool and forms part of the fresh water supply for the town. It was built in the 1930’s by the construction of an earthfill dam across the natural breach of the crater of an extinct volcano. The reservoir is an offline storage with a small natural catchment and has a nominal capacity of 770ML at Full Supply Level (FSL). The reservoir is operated by South West Water Authority (SWWA).

Previous investigations had identified instability issues associated with the dam embankment and the necessity for remedial work to increase the stability of the dam embankment. SKM undertook detailed survey and investigations and the proposed upgrade works include the construction of a downstream stabilising berm incorporating graded filters and a drainage system. The condition of the outlet works was investigated as part of the project, with some of these works found to be in poor condition with a risk to the security of supply, necessitating the design of refurbishment of the outlet works. The degree of siltation of the reservoir was also assessed, and some loss of capacity due to siltation was noted.

Detailed investigations were performed to determine the optimum configuration of the stabilising berm and to locate and test suitable construction materials. The embankment interface filters were designed to satisfy modern filter design criteria and were incorporated in the embankment drainage system. The condition of the outlet works, including the intake standpipe, three offtake valves and the outlet conduit beneath the embankment, were assessed via manual and CCTV inspections. An operation review, incorporating the proposed upgrade works within the framework of ongoing operation of the reservoir for supply to downstream customers was also prepared, as was a construction risk assessment.

This paper will present “extremely useful practical information” for dam design engineers, owners and operators where the whole spectrum of dam safety issues is required for the successful completion of remedial works design and construction.

Now showing all 10 search results

  • $15.00
    2003  Papers

    2003 – INVESTIGATIONS AND DESIGN OF UPGRADE WORKS AT TANK HILL RESERVOIR IN VICTORIA

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  • $15.00
    2005  Papers

    2005 – Pykes Creek Reservoir; Upgrading the Outlet Works for a 95 year old Dam

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  • $15.00
    2016  Papers

    2016 – Spillway gates, CFD analysis, Uplift forces, Hydrodynamic forces, Flow Modification, Gate Locking Mechanism.

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  • $15.00
    2018  Papers

    2018 – Lake Buffalo Spillway Gates Upgrade

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  • $15.00
    2012  Papers

    2012 – Logue Brook Dam Outlet Works Upgrade

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  • $15.00
    2012  Papers

    2012 – Enlarged Cotter Dam Diversion Gate Design – The Challenge and the Test

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  • $15.00
    2012  Papers

    2012 – Mundaring Weir – Bringing a 19th Century Asset into the 21st Century

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  • $15.00
    2011  Papers

    2011 – Refurbishing Outlet Valves utilising Shutdown Periods

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  • $15.00
    2011  Papers

    2011 – Safer Access at Water Corporation Dams

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  • $15.00
    2011  Papers

    2011 – Horror Stories with Outlet Works

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