Rangitīkei District Council has put the total cost of Monday night's flooding at $800,000.
That's according to the council's project engineer for roading, Phillip Gifford, who said the figure was based on the very limited information currently available.
"Extremely heavy rainfall flooded the township of Hunterville, the North Island Main Trunk Railway and the local road network," Gifford said
"The flooding caused numerous slips along a number of roads, particularly Ongo Rd and Turakina Valley Rd."
A 20km length of Mangahoe Rd was extensively damaged and is currently closed.