The Minnesota Supreme Court has rejected an appeal by opponents regarding the environmental impact statement (EIS) for Enbridge's proposed $2.9 billion pipeline — setting the stage for state utility regulators to fix the flawed document.
While the high court's decision restarts an oft-stalled process, it could still take several months before Enbridge gains the go-ahead for its controversial plan to replace the aging and corroding Line 3 across northern Minnesota.
In June, the Minnesota Court of Appeals shot down utility regulators' approval of the environmental impact statement (EIS) for the project, putting the long-delayed project in further limbo.
The appeals court sided with pipeline opponents on a key part of their complaint about the EIS: that the study didn't properly address the effects of a potential oil spill in the Lake Superior watershed. However, the appellate court rejected other arguments by Line 3 opponents against the adequacy of the EIS.

Honor the Earth and the Mille Lacs, White Earth and Red Lake Ojibwe bands then petitioned the Supreme Court to take up the other arguments. The Supreme Court, which hears fewer than 15% of the petitions it receives, issued its denial of the Line 3 request Tuesday.
"We are profoundly disappointed that the Minnesota Supreme Court felt more interested in siding with the rights of a Canadian corporation to proceed with a high-risk project than protecting the rights of the Minnesota Anishinabe and indigenous people and the rights of nature," Winona LaDuke, head of Honor the Earth, said in a statement.
The Minnesota Public Utilities Commission (PUC), which was waiting on the high court's decision, said Tuesday that it would now take up the EIS "as soon as possible."
Enbridge said in a statement it was "confident the [PUC] will soon provide guidance on the remaining process and schedule." The Minnesota Department of Commerce conducted the EIS, and is expected to be told by the PUC how to fix it so it complies with the appellate court ruling.