A Michigan regulatory panel wants more information on Enbridge Energy’s plan to drill an oil pipeline tunnel beneath a channel linking two of the Great Lakes.
The state Public Service Commission delayed a decision Thursday on the Canadian company's request for a permit to run a section of its Line 5 through the proposed tunnel.
The commission says it doesn't have enough details on tunnel engineering and safety risks.
The 69-year-old pipeline carries oil through northern Michigan and Wisconsin to refineries in Sarnia, Ontario. One section crosses the bottom of the Straits of Mackinac between Lake Huron and Lake Michigan.