Northern Pipeline Interconnector Case study Stage 2 – J series jacking pipes and interjack stations Strength. Performance. Passion.Humes played an integral role in the successful completion of the Southern Hemisphere’s longest pipe-jack, at Nambour in South East Queensland. The pipe-jack is part of the Northern Pipeline Interconnector (NPI) – Stage 2, which involves construction of 48 kilometres of underground, reverse-flow water pipeline fro

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