Last week, Energy Transfer Partners, the company constructing the Dakota Access Pipeline, voluntarily stopped work at the building site just North of the Standing Rock Sioux Reservation.

The Army Corps of Engineers has confirmed that the company doesn't have a written easement from the agency to build on Corps property. A Corps spokesperson says that Energy Transfer Partners has filed the paperwork for the easement but it's still under review.

"That's true they don't have the easement that's required to install the segment that's across the Oahe project," said Larry Janis, Army Corps Of Engineers.

Janis says there is no timetable on when the easement will be granted, but the agency has issued a permission that allows the easement to be written.