The Army on Wednesday granted the developer of the four-state oil pipeline formal permission to lay pipe under a Missouri River reservoir in North Dakota, clearing the way for completion of the disputed project.
Work had been stalled for months due to opposition by the Standing Rock Sioux, but President Donald Trump last month instructed the Army Corps of Engineers to advance pipeline construction.
The tribe fears a pipeline leak could contaminate its drinking water. ETP says the pipeline is safe.
Opponents of the $3.8 billion project meanwhile protested around the country in an action some dubbed their "last stand."