Federal officials hear arguments on Enbridge pipeline tunnel
Canadian pipeline company wants to drill a nearly 6.4-kilometre tunnel through bedrock under the Straits of Mackinac.
Enbridge wins approval to restart east leg of Line 5 pipeline
Both legs shut down in June after noticing a disturbance to an underwater anchor supporting the eastern line.
Michigan asks judge to shut Enbridge pipeline in Great Lakes
Energy company insists Line 5 pipeline was not damaged, flow of oil and natural gas liquids resumed June 20.