Meadows said so far only minor injuries had been reported but she expected the driver of the ute to be transferred to hospital once they were rescued from the vehicle.
Emergency services were at the scene and all lanes of Wairere Drive as well as the Pukete Bridge were closed with diversions in place.
Motorists in the Pukete and Flagstaff communities were reporting delays of up to an hour.
Meanwhile police are at the scene of a serious crash on State Highway 3, Kai Iwi, near Whanganui.
Emergency services were alerted to the two vehicle crash at around 12.41pm.
Initial indications are that one person is seriously injured. The road will be closed.
Motorists are asked to avoid the area and expect delays.