NPR | Keystone Pipeline Oil Spill Reported In South Dakota NPR TransCanada, the company that owns and operates the Keystone Pipeline, says that an estimated 210,000 gallons, or 5000 barrels, of oil have spilled near the small town of Amherst, S.D.. The cause of the leak is under investigation, according to the ... Keystone Pipeline leaks 210000 gallons of oil in South Dakota Keystone pipeline shut down after spilling 5000 barrels of oil in South Dakota Keystone pipeline spills 210000 gallons of oil on eve of permitting decision for TransCanada |