Minnesota agencies on Thursday granted environmental permits for Enbridge's proposed oil pipeline across northern Minnesota, critical approvals needed for construction to begin soon on the controversial $2.6 billion project.
The Minnesota Pollution Control Agency (MPCA) approved permits dealing with water-quality and wetland issues arising from construction of the 340-mile pipeline. The state Department of Natural Resources (DNR) granted several permits as well.
The U.S. Army Corps of Engineers still must grant its own environmental permit — but Enbridge expects the OK soon. A union official said Thursday he anticipates Enbridge will begin construction next month.

The new pipeline, a replacement for the company's deteriorating Line 3, would transport heavy Canadian oil to Enbridge's terminal in Superior, Wis. It has been navigating the Minnesota regulatory process for six years.
"The MPCA has used sound science and thorough analysis to ensure that the necessary safeguards are in place to protect Minnesota's waters," MPCA Commissioner Laura Bishop said in a statement.
The MPCA said it issued its "most stringent" water-quality permit ever for the Line 3 project. Enbridge must do "extensive" mitigation of streams and wetlands that it disturbs, the agency said.
The pipeline would cross 212 streams and affect more than 700 acres of wetlands in Minnesota — the reason many environmental groups have fought the project throughout the regulatory process.
"Clearly, [the environmental] community is deeply disappointed that our lead environmental protection agency … would permit a project without using the tools it has to fully review [the pipeline's] dramatic climate and environmental justice impacts," said Steve Morse, head of the Minnesota Environmental Partnership.