TOPEKA, Kan. (AP) — An oil spill in a creek in northeastern Kansas this week is the largest for an onshore crude pipeline in more than nine years and by far the biggest in the history of the Keystone pipeline, according to federal data.

Canada-based TC Energy on Thursday estimated the spill on the Keystone system at about 14,000 barrels, or 588,000 gallons. It said the affected pipeline segment had been "isolated," the oil had been contained at the site with booms, or barriers, and environmental monitoring had been set up, including around-the-clock air-quality monitoring. It did not say how t...