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North Island Hydraulic Survey Party
The North Island Hydraulic Survey Party conducted hydrometric recordings for the Whanganui-Manawatu region from the early 1950s til it's closure on 1 January 1968. The new entity was transferred to the Ministry of Works Palmerston North office, with another office in the Whanganui Region.
Horizons Regional Council Hydrometric Recording Authority Code 70