VIDEO: the largest ever US land based oil spill

A  crude oil pipeline has leaked an estimated 20 thousand barrels into a North Dakota wheat farm, believed to be the largest land based spill in US history.

The pipeline takes crude from Tioga, North Dakota, part of the Bakken formation to rail cars roughly 70 km away.

Early assessments of the accident state that a quarter-inch hole is to blame for the spillage.

Tesoro Logistics LP, the company in charge of the pipeline, has released a statement, claiming that no surface waters have been impacted.