Opponents of the Keystone XL pipeline demonstrate on the Dodge Street pedestrian bridge during rush hour in Omaha, Neb., Wednesday, Nov. 1, 2017. The Nebraska Public Service Commission has until Nov. 23 to decide whether to approve or reject a proposed state route for the Keystone XL pipeline. (AP Photo/Nati Harnik)

Keystone Pipeline Spills 210K Gallons of Oil in South Dakota

Discovery of the leak comes just days before Nebraska regulators are scheduled to announce their decision Monday whether to approve the proposed Keystone XL oil pipeline.