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Churchman Brook Dam is a 26m high earthfill dam with a puddle clay core and impounds a reservoir of 2.2GL. Various remedial works have been undertaken since completion of construction in 1928. In September 2000, a sinkhole in the right abutment was observed during a routine dam inspection. Following this incident, detailed site investigations were carried out. These investigations revealed that there are soft zones and possibly voids formed in the upper part of the clay core.

A comprehensive dam safety study and a risk workshop undertaken in 2002/2003 showed the dam to be deficient in aspects associated with piping, spillway adequacy and outlet works condition. A rational geotechnical model was developed for the foundation utilising triaxial test data from 1980s and recent investigations. The existing spillway chute will be upgraded with a concrete liner attached to the existing chute incorporating no-fine concrete as a free-draining medium. This paper presents the various aspects of the remedial works currently being designed.

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    2003  Papers

    2003 – REMEDIAL WORKS DESIGN AT CHURCHMAN BROOK DAM IN WESTERN AUSTRALIA

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    2003  Papers

    2003 – Remedial Works Design At Churchman Brook in Western Australia

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    2005  Papers

    2005 – ASSESSMENT CRITERIA FOR EMBANKMENT DAMS AND THE ROLE OF NUMERICAL MODELS

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    2005  Papers

    2005 – Assessment Criteria for Embankment Dams and the Role of Numerical Models

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    2005  Papers

    2005 – Dam design, Geotechnical Parameters, Numerical Codes, Hydraulic Fracturing, Seismic Analysis.

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    2006  Papers

    2006 – Investigations and Design of Remedial Works at Millbrook Dam in South Australia

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    2018  Papers

    2018 – Integrating Climate Change into Dams Management Practices

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    2007  Papers

    2007 – Design inputs for stability assessment of dams on New Zealand greywackes

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