MACKINAC COUNTY, Mich. – There was praise and disappointment on Friday after the Michigan Department Environment, Great Lakes and Energy approved the first permits to for the controversial tunnel project around the Enbridge Line 5 gas line. The dual oil pipeline is among the largest in the region and runs directly through the Mackinac Straits carrying 23 million gallons of crude oil each day. In 2010, a separate Enbridge pipeline spilled more than 800,000 gallons of oil into Talmadge Creek and the Kalamazoo River. AdEnvironmental scientists estimate an oil spill in the Straits of Mackinac would cost almost $2 billion in cleaning costs and lost tourism revenue. This week the Canadian Consul General in Detroit telling the Canadian National Post shutting down Line 5 could harm Canadian-U.S. relations.