Two environmental groups appealed the Michigan Public Service Commission (MPSC)’s decision to approve the Line 5 tunnel project in the Straits of Mackinac.

The Michigan Public Service Commission (MPSC) approved on Friday a plan by Enbridge to replace the segment of the Line 5 pipeline crossing the Straits of Mackinac with a concrete tunnel, on the condition that the replacement will undergo additional safety testing and standards.

Canadian-based Enbridge Energy will appeal a Wisconsin judge’s $5.15 million trespass ruling, which also calls for the company to remove its pipeline from an Indian tribe’s reservation within three years.

In a Diabetes Alert Day press release last week, Enbridge, operator of the Line 5 pipeline, highlighted the necessity for light oil and natural gas to manufacture medications, exercise equipment, blood sugar meters, injection pens and insulin pumps used by those diagnosed with diabetes.