"A Tesoro Logistics LP pipeline has spilled more than 20,000 barrels of crude oil into a North Dakota wheat field, the biggest leak in the state since it became a major U.S. producer."
"The six-inch pipeline was carrying crude oil from the Bakken shale play to the Stampede rail facility outside Columbus, North Dakota. The affected part of the line has been shut down, Tesoro said.
Farmer Steven Jensen discovered the leak on September 29 while harvesting wheat on his 1,800-acre farm, about nine miles northeast of Tioga, North Dakota."