Enbridge Line 5

Enbridge Line 5
Line 5 passes underneath the Straits of Mackinac
Location
Country	United States, Canada
State	Wisconsin, Michigan
From	Superior, Wisconsin
To	Sarnia, Ontario
General information
Type	oil
Owner	Enbridge
Commissioned	1953; 71 years ago (1953)
Technical information
Length	645 mi (1,038 km)
Diameter	30 in (762 mm)

Enbridge Line 5 is a 645-mile oil pipeline owned by the Canadian multinational corporation Enbridge. Constructed in 1953, the pipeline conveys crude oil from western Canada to eastern Canada via the Great Lakes states. Line 5 is part of the Enbridge Lakehead System and passes under the environmentally sensitive Straits of Mackinac, which connect Lake Michigan to Lake Huron. The 30-inch pipeline carries 540,000 barrels (86,000 m³) of synthetic crude, natural gas liquids, sweet crude, and light sour crude per day^[1] as of 2013.^[2]

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 replace the underwater segment of Line 5 and with a new pipeline segment housed in a tunnel.