The pipeline would begin in
U.S. District Judge Brian Morris essentially delayed the $8 billion project to study its environmental impact. Environmentalists and Native American groups sued to stop the project, citing property rights and potential oil spills.
Becky Mitchell, chairwoman of the Northern Plains Resource Council, a plaintiff in the case, said that the organization is thrilled with the ruling.
TransCanada, which is pushing the project, did not immediately respond to a request for comment early Friday.