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TransCanada has announced that its Keystone pipeline—the model for the Keystone XL pipeline, which was the center of mass protests throughout 2016-17—has been shut down after leaking 5,000 barrels of oil, or 210,000 gallons, in Marshall County, South Dakota.

According to South Dakota’s local ABC affiliate KSFY:

“Brian Walsh with the Department of Environment and Natural Resources tells KSFY News they were alerted to the leak at 10:30 a.m. Thursday morning by TransCanada...The pipeline has been shut off and the leak has been covered. An emergency response plan has been activated to get more staff and contractors to the site for clean up.

Walsh also says that no oil has entered the state’s waterways. (Water contamination was a major concern to protesters who camped out at Dakota Access/Keystone XL Pipeline construction sites last winter in the brutal cold, leading to what’s now known as the Standing Rock Movement, which was led by the Standing Rock Sioux and Indigenous Environmental Network.) However, the leak—with a clean-up estimated to take “some time,” according to Walsh—has damaged large portions of agricultural land throughout Marshall County.

The Keystone pipeline—shut down following the leak—is owned by TransCanada and funnels oil between Alberta, Canada and Patoka, Illinois or Port Arthur, Texas. The construction of the Keystone XL pipeline, which will add a segment connecting Steele City, Nebraska to Hardisty, Alberta (running through South Dakota and posing the risk of polluting several waterways), was approved in an executive order signed by Donald Trump last January.