Heavy rain in the Gisborne-East Coast region earlier this month caused more than $2 million of damage to the rural roading network there.
Parts of the region received more than 300mm of rain in several days.
Gisborne District Council says rural roads were extensively damaged. There were several serious slips, one involving more than 30,000 cubic metres of debris. High water tables caused serious potholing on many roads.
Works manager Peter Higgs says an accurate assessment of the damage is being calculated and a precise figure will be available later in the week.
Meanwhile, the Transport Agency is also assessing state highway damage. It says precise engineering analysis is needed on some big slips before an estimate of the cost of repairs is made public.