Previous cost estimates have not been updated since the state proposed a utility tunnel under the Straits of Mackinac.
A three-member board overseeing the tunnel project for the state is scheduled to hold its first meeting Wednesday.
The remaining six weeks of Michigan Gov. Rick Snyder’s eight-year term will be crucial for the Line 5 pipeline.
The Energy News Network spoke with the architect of a legal argument designed to force government action on climate change.
An underground “utility corridor” carrying Michigan’s Line 5 pipeline and transmission cables across the Straits of Mackinac could prevent accidents but also cost at least half a billion dollars and take seven years to build.