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Steven Fox, Garry Fyfe

This paper describes some key details of the construction of the Lake Eppalock Main Embankment Remedial Works Project. This $8.25 million earthworks project was completed on a “live” storage to an accelerated program. As the dam owner Goulburn-Murray Water took the decision to directly manage the construction of these works with resultant benefits in timing, risk management and project management costs.

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2000 Papers

2000 – It’s More Fun When You Do It Yourself – Constructing the Lake Eppalock Main Embankment Remedial Works Project
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Steven Fox, Garry Fyfe

This paper describes some key details of the construction of the Lake Eppalock Main Embankment Remedial Works Project. This $8.25 million earthworks project was completed on a “live” storage to an accelerated program. As the dam owner Goulburn-Murray Water took the decision to directly manage the construction of these works with resultant benefits in timing, risk management and project management costs.

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2003 Papers

2003 – POSITIVE COMMUNITY INVOLVEMENT SAVES TIME AND COSTS AT YARRAWONGA WEIR
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Yarrawonga Weir was constructed in the 1930’s and is located on the Victoria / New South Wales border, between the towns of Yarrawonga and Mulwala. Dam safety investigations revealed that the main embankment was founded on a very loose layer of sand that would be vulnerable to liquefaction even under the operating basis earthquake

This paper details the statutory approvals and community consultation processes that were employed and the benefits that they provided to the $13 million remedial works project.

Local communities can assist, be neutral or obstruct a project. By engaging the community in a positive manner it is possible to deliver excellent results without increasing costs.
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2003 Papers

2003 – Positive Community Involvement Saves Time and Costs At Yarrawonga Weir
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Steven Fox and Mark Tansley

Yarrawonga Weir was constructed in the 1930’s and is located on the Victoria / New South Wales border, between the towns of Yarrawonga and Mulwala. Dam safety investigations revealed that the main embankment was founded on a very loose layer of sand that would be vulnerable to liquefaction even under the operating basis earthquake.

This paper details the statutory approvals and community consultation processes that were employed and the benefits that they provided to the $13 million remedial works project.
Local communities can assist, be neutral or obstruct a project. By engaging the community in a positive manner it is possible to deliver excellent results without increasing costs.
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2005 Papers

2005 – The Eildon Dam Improvement Project – Another Alliancing Success Story
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Steven Fox, Robert Cooper, Shane McGrath

The Project Alliance delivery model is becoming more popular within the dams industry as owners, designers and constructors seek more effective ways to deliver upgrades that are needed to meet
contemporary community expectations whilst managing the significant safety and commercial risks
typical of these projects.

The Eildon Alliance has recently completed the Eild on Dam Improvement Project on behalf of Goulburn- Murray Water. This $52 M project involved reconstruction and raising of the upper portion of the 80 m high embankment, works to strengthen the spillway chute to cope with larger flood events and refurbishment of the original 50 year old spillway mechanical equipment.

The Eildon Alliance was responsible for the detailed design, construction, commissioning and project
management of this major upgrade. To be successful, a project alliance requires
the alliance partners to adopt a cooperative approach throughout the project. This paper de
tails the benefits that this cooperation provided at Eildon, reasons for selecting the alliance project delivery model and the outcomes achieved.
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Papers

2019 – Hydrophilic Waterstops in Dam Engineering
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Sam Taubert, Peter Buchanan, Steven Fox

Hydrophilic waterstops have been used in in-situ concrete for convenience, cost savings and in locations where installing an alternative form of waterstop has not been practical. The waterstop is often preferred to traditional PVC waterstops given its simplified construction methodology whilst still providing seals of up to 50 m of head. The principle of the performance of the waterstop is that it is capable of expanding upon absorption of water to seal the joint, making it ideal for gap variation. However, recent experience has indicated that this ability to expand can generate sufficient forces to generate localised failure of concrete including cracking, spalling, and exposure of reinforcement and ultimately failure of joints.

This paper reviews examples of poor detailing of hydrophilic water stop installation, the conditions leading to the failure of the concrete, how these compare to the waterstop manufacturers installation recommendations and discusses the design approach to using hydrophilic waterstops and its shortcomings in dam spillway engineering.
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2007 Papers

2007 – Calculating spillway crest pressures for high-head operation
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Paul Hurst, Tom Ewing, Steven Fox and Bob Wark

For an ogee-shaped spillway crest, it is well recognised that sub-atmospheric pressures will develop on the lower-nappe profile for operating heads greater than design head. This effect is useful in providing an increase in efficiency of the spillway discharge for small increases in operating head. However, there is limited data on the formation of sub-atmospheric crest pressures for high-head operation above 1.3 times greater than the design head

This paper reports on modelling work done by GHD and the Water Corporation for the Wellington Dam Remedial Works Project in Western Australia where the current design flood has increased to more than twice the original design head. Two-dimensional physical scale modelling and 3-D Computational Fluid Dynamics (CFD) modelling of the existing Wellington Dam spillway profile was carried out to determine the discharge coefficient and uplift force generated by the formation of sub-atmospheric crest pressures under high-head operation.

The paper compares the results of the physical scale model and the CFD model and earlier published data by Cassidy (1970) and concludes that there exists a good correlation between the three data sets.

Keywords: Ogee, sub-atmospheric, crest pressures, Wellington Dam
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2012 Papers

2012 – 15 Years of Experience with a Dam Improvement Program
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Shane McGrath, Andrew Reynolds, Garry Fyfe, Chris Kelly, Steven Fox

Goulburn-Murray Water is a rural water corporation located in Northern Victoria. It has responsibility for 12 State dams and is also the constructing authority for the Murray Darling Basin Authority’s Victorian assets.

Over the past 15 years G-MW has been engaged in a dam improvement program across its portfolio. To date 14 individual projects have been undertaken at 11 dams. The total expenditure is $125 million.

Starting from a base level of data at its inception in 1997, the program has encompassed all facets required for a dam improvement program. From early prioritisation to set the investigation program, through design reviews and risk assessments to develop the upgrading program and subsequent implementation. Some elements of the program were at the leading edge of practice at the time and a range of experiences along the way were character building as dam safety investment challenged other corporate priorities.

This paper sets out the lessons learned in developing the methodology and implementing the program of works, particularly relating to corporate adoption of the program, organisational capability, investigations, risk assessments, design and implementation.
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2011 Papers

2011 – Western Australian Dam Safety Challenges for ANCOLD Part 2
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Michael Somerford and Steven Fox

The Water Corporation of Western Australia has been implementing the risk assessment process promulgated by ANCOLD for 12 years. This approach has been central to a $310 million dam safety remedial works program that has reduced life safety risk across the Water Corporation’s portfolio of dams by an order of magnitude. However, whilst this process has provided a rational basis to prioritise dam safety upgrades, there are still questions that have not been fully answered and further development of the application of risk assessment to dams is desirable.

This paper revisits some of the key concerns that remain evident with the process and argues that unless further guidance is provided it may be that dam safety upgrades have effectively “hit the wall”; and upgrade programs commenced may never be completed as envisaged by ANCOLD.

2011 – Western Australian Dam Safety Challenges for ANCOLD Part 2
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Search Results: “” — Page 1

Sam Taubert, Peter Buchanan, Steven Fox