Keystone pipeline leak days before Nebraska expansion ruling

PIERRE, S.D. (AP) — TransCanada Corp.’s Keystone pipeline leaked an estimated 210,000 gallons of oil onto agricultural land in northeastern South Dakota, but state officials don’t believe the leak polluted any surface water bodies or drinking water systems.

State officials and pipeline operator TransCanada Corp. disclosed the leak Thursday, and the company shut down the pipeline.

TransCanada said it activated emergency response procedures after detecting a drop in pressure resulting from the leak south of a pump station in Marshall County. The cause was being investigated.

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, an expansion that would boost the amount of oil TransCanada is now shipping through the existing line, which is known simply as Keystone. The expansion has faced fierce opposition from environmental groups, American Indian tribes and some landowners.

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