The closure will affect more than 2 hundred families leaving on the either side of this crossing.
Heavy rain on Thursday night that brought floods washed away a temporary culvert crossing which was used by vehicles.
An irish crossing used to be here, but recently a bridge construction project had commenced.
The provincial administration has ordered that this road be closed until further notice.
Residents in the area, mainly farmers will now to have use alternative routes to get to town.
All bus services have also ceased.
Waimari is about half an hour from Rakiraki town.