AMHERST, S.D. (AP) TransCanada Corp.'s Keystone pipeline leaked an estimated 210,000 gallons of oil onto agricultural land in northeastern South Dakota, the company and state regulators said Thursday, but state officials don't believe the leak polluted any surface water bodies or drinking water systems. Crews shut down the
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.
By Matt Brown