Shutting down the pipeline would cut off the Upper Peninsula from its supply of cheap propane, but clean energy advocates say there are better alternatives for heating.
The Chippewa tribe in northern Wisconsin says Enbridge could reduce the risk to the Great Lakes by diverting Line 5 oil to another line that runs south to Illinois.
The 280-mile Delta Express pipeline would connect an existing natural gas pipeline in northern Louisiana to a liquid natural gas facility in its southernmost parish.
After a half-decade fight over pipeline easements, property owners look to recoup legal costs and property values.
Environmental groups behind the lawsuit say federal regulators violated a 2017 court ruling when they approved the project.