An estimated 3,500 barrels of crude oil spilled into an agricultural field in North Dakota after a Keystone Pipeline employee ...

The cause of the rupture and the total volume of oil released after the North Dakota spill remain unclear, officials said.

Somewhere in the rural quiet of Fort Ransom, North Dakota, the Keystone pipeline made a bit of a splash this morning—literally. A mechanical bang startled an on-site worker enough to shut down the ...

The 2,700-mile-long (4,350-kilometer-long) pipeline originates in Alberta, Canada, and carries heavy tar sands crude oil south across the Dakotas and Nebraska before splitting to carry oil both to ...

The nearly 2,700-mile Keystone oil pipeline was shut down Tuesday morning after it ruptured in North Dakota, halting the flow of millions of gallons of crude oil.