Cosseys Raw Water main
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Client:
Watercare Services
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Location:
Auckland, New Zealand
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Project Details:
3,400m of pipe at 1575mm OD and 11mm and 16mm WT.
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Completion:
March 2010
The Cosseys raw water main is a critical connection within Auckland’s water supply infrastructure. The deterioration of two large diameter 1,962mm and 1,500mm pipes, installed in 1950, necessitated replacement along a 3.5-kilometre-long route downstream of Cosseys Dam towards Hunua Village, south of Auckland.
The main project risk was the potential disruption to Auckland’s water supply which meant that all parties – Watercare, contractor Pipeline and Civil and Steelpipe –worked closely together to develop and deliver a plan that mitigated this risk.
To ensure no delays, Steelpipe manufactured a large amount of pipe in advance, then managed the onsite storage and protection of the pipe, re-inspecting each section before it was laid. This was crucial to de-risking the project and the successful, on time completion.
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