A 2017 crude oil spill in South Dakota that came from TransCanada's Keystone pipeline was nearly double the original estimate, making the November incident the largest inland spill in the U.S. since 2010.
The Aberdeen American News reported that a spokesperson for TransCanada told the newspaper the incident caused 9,700 barrels of oil to leak in rural South Dakota on November 16. The original estimate was 5,000 barrels.
The pipeline was shut down immediately following the incident and was back in operation less than two weeks later.
TransCanada said the pipeline had been fully repaired and cleanup had been conducted.
The Keystone crude oil pipeline moves 590,000 barrels a day and links Alberta's oil fields to U.S. refineries.