Police are appealing for information after a man fled from officers after the serious incident in Whangārei.
There have been at least 30 water-related deaths in New Zealand since the beginning of December.
The crash between Whangarei and Dargaville occurred on a straight piece of road on Sunday morning.
Police say a 48-year-old man is due to appear in Whangārei District Court on Saturday.
The injured person was taken to hospital in a moderate condition.
The man who was assaulted was unable to verbally communicate, so couldn't cry for help.
"He was barely able to keep his head above water."
But much of its mosaics are hidden from view and even the workers aren't allowed to give away the big reveal.
Police are at the scene.