Mangaweka deviation

The Mangaweka Deviation is a 7 km single track deviation of the North Island Main Trunk (NIMT) railway line in the central North Island of New Zealand, between the settlements of Mangaweka and Utiku, south of Taihape. Opened on 18 November 1981, by the Prime Minister, Robert Muldoon, it was constructed between 1973 and 1981 at a cost of $17m; to move the line away from geologically unstable land; and also to replace the high-maintenance steel viaducts including the Mangaweka Viaduct. It is the most recent and most significant deviation of the NIMT since it was opened in 1909.

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