RCMP say the incident took place at around 10:00 last night about 25 kilometres south of the city.
Corporal Roy Kennedy says the impact of the crash saw the trailer separate from the cab, with the rig in one ditch and the load in the other.
There was some spillage, but it’s not known what the liquid was.
It’s believed the injuries to the driver were minor.
Kennedy says a passer-by was able to take the person directly to the QE2 Hospital in Grande Prairie.
The cause of the rollover remains under investigation.