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Story: Engineering

Stopping the leaks

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Stopping the leaks

The Public Works Department’s engineer-in-chief suggested that the government seek the advice of Swedish engineer P. G. Hornell on fixing the Arapuni dam. Hornell designed a complex, flexible lining of the dam’s headrace (the watercourse leading to the powerhouse). The lining consisted of steel plates, concrete slabs and a lot of bitumen. Hornell’s solution was not effective, and nor were the ongoing attempts to prevent seepage. In 2007 a two-year drilling project intended to stabilise fissures in the rock below the dam was completed.

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Alexander Turnbull Library, F. W. Furket Collection

Reference: PA1-Q-769-07

Permission of the Alexander Turnbull Library, National Library of New Zealand, Te Puna Mātauranga o Aotearoa, must be obtained before any re-use of this image.

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How to cite this page

Matthew Wright, Engineering – Engineering, 1900–1945, Te Ara – the Encyclopedia of New Zealand, https://teara.govt.nz/en/photograph/21608/stopping-the-leaks (accessed 4 June 2026).

Story by Matthew Wright, published 26 February 2010.