Every day, nearly 23 million gallons of oil flow through two aging pipelines in the heart of the Great Lakes, just 1.5 miles west of the Mackinac Bridge. Constructed during the Eisenhower administration in 1953, these two Enbridge Line 5 pipelines lie exposed at the bottom of the Straits of Mackinac, a busy shipping channel. Enbridge was ordered to shut down in May 2021 by Michigan Gov. Whitmer, but ignored the order and are still operating.