Wainikasou Hydro Power Project, Fiji
MWH New Zealand Ltd

Constructed in an isolated spot on a distant island, this 6.5-megawatt hydroelectric project was the first major renewable energy project in Fiji for over 25 years.

The project team’s task was to assess hydroelectric potential and, later, to integrate design and installation. Its studies recommended the use of an inflatable gate on an existing weir, construction of the power station, and construction of a 30-kilometre, 33-kilovolt transmission line to an existing substation. Design and procurement proceeded in parallel.

The facility had to be fully automated, monitored by a control centre 120 kilometres away – a common situation in New Zealand but not in Fiji where links are frequently unreliable. Access and communication problems meant that designs had to be right first time. The tropical nature of the region meant the site experienced heavy rain showers most afternoons.

The scheme, though not large by New Zealand standards, demonstrates how careful planning, design and implementation can deliver a valuable project on time and to budget, despite adverse conditions.

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