Exactly what Native Americans and others were protesting

The Keystone pipeline system, an addition to which has been the subject of environmental protests for years, leaked about 383,000 gallons of crude oil in North Dakota, covering an estimated half-acre of wetland, state environmental regulators said.

[...]

“It is one of the larger spills in the state,” [Karl Rockeman, the director of the state Department of Environmental Quality’s division of water quality] said in an email on Thursday.

There are no residences near the site and the wetland is not a source of drinking water, he said.

[...]

The leak occurred along a stretch of the existing Keystone pipeline system, not the 1,179-mile-long addition to that system known as the Keystone XL pipeline, he said. Keystone XL has been the subject of environmental protests for years. President Barack Obama denied it a permit in 2015, but just days after taking office President Trump cleared a path for its operator, TC Energy, formerly known as TransCanada, to proceed.

[...]

“We don’t yet know the extent of the damage from this latest tar sands spill, but what we do know is that this is not the first time this pipeline has spilled toxic tar sands, and it won’t be the last,” [Catherine Collentine, an associate director with the Sierra Club] said.

[...]

In 2017, a spill along the Keystone pipeline system coated a stretch of grassland in South Dakota with more than 407,000 gallons of leaked Canadian crude oil, which was nearly twice as much as originally estimated, according to the company. The pipeline also leaked about 16,000 gallons each in spills in 2011 in North Dakota and in 2016 in South Dakota.

[...]

The system contains 2,687 miles of pipeline.

  NYT