This map supplied by Fulton Hogan shows the location of the crash.
The Patearoa road was closed at the Waipiata-Kyburn Rd and Gimmerburn-Waipiata Rd intersection from around 1am after a milk tanker and trailer rolled.
A police spokeswoman said there were no reports of injuries or any other vehicle involved, just milk leaking.
In an update about 1.15pm, a Fulton Hogan spokeswoman advised that the vehicle had been recovered and the road had reopened.
