The $3.8 billion Dakota Access pipeline began shipping oil for customers on Thursday, as Native American tribes that opposed the project vowed to continue fighting.
Authorities in South Dakota on Tuesday confirmed an incident of vandalism against the Dakota Access oil pipeline in which someone burned a hole through an empty section of pipe.
President Donald Trump has signed executive actions to advance the construction of the Keystone XL and Dakota Access oil pipelines.
The Army says it's planning to study the potential environmental impact of routing the $3.8 billion Dakota Access pipeline under the Missouri River in North Dakota, although a judge could stall the study.
President Obama says the U.S. Army Corps of Engineers is examining whether the Dakota Access oil pipeline can be rerouted in southern North Dakota to alleviate the concerns of American Indians.