CALGARY — TransCanada Corp. says its Keystone pipeline has leaked an estimated 795,000 litres of oil in Marshall County, S.D.
The company says its crews shut down the pipeline early this morning after detecting a drop in pressure and are assessing the situation.
The leak comes only days before Nebraska's Public Service Commission is set to vote on whether to allow the company to proceed with its Keystone XL pipeline for the last major regulatory hurdle for the $8 billion project.
More from HuffPost Canada:
Opponents of Keystone XL say the pipeline would pass through the Sandhills, an ecologically fragile region of grass-covered sand dunes, and would cross the land of farmers and ranchers who don't want it.
The pipeline would transport oilsands oil from Alberta through Montana and South Dakota to Nebraska, where it would connect with existing pipelines that feed Texas Gulf Coast refineries.
The existing Keystone pipeline system that has leaked about 5,000 barrels of oil runs 4,324 kilometres between Hardisty, Alta., and the U.S. Mideast and Gulf Coast.
Related on HuffPost: