The Bad River tribe and environmental groups have made their case that the state should overturn key permits issued to Canadian energy firm Enbridge as it seeks to reroute an oil and gas pipeline around the tribe’s reservation.

The state held a contested case hearing in Ashland last month after the tribe, along with Midwest Environmental Advocates and Clean Wisconsin, challenged permits for the project in December. The proceedings will continue through October 3rd.

In separate challenges, the tribe and environmental advocates argued that the Wisconsin Department of Natural Resources failed to comply with state law when it granted a wetland and waterway permit along with a construction storm water permit for Enbridge’s Line 5 relocation project.