Enbridge Line 5 is a 30-inch 645-mile oil pipeline in the Enbridge Lakehead System, which conveys petroleum from western Canada to eastern Canada via the Great Lakes states since 1953. Line 5 is particularly notable for passing under the environmentally sensitive Straits of Mackinac, which connect Lake Michigan to Lake Huron. As of December 2013, the line carried 540,000 barrels (86,000 m3) of oil per day. It carries synthetic crude, natural gas liquids, sweet crude, and light sour crude. As of 2017, Line 5 had spilled at least 1.1million gallons since 1967. In December, 2018 the Michigan Department of Natural Resources announced that the Mackinac Straits Corridor Authority (MSCA), with outgoing Governor Rick Snyder, had approved Enbridge’s plan to remove the underwater segment of the Line