Line 5

An environmental group opposed to an oil pipeline beneath the Great Lakes has requested that state leaders shut down the pipe due to alleged safety violations.

The group Oil & Water Don’t Mix says the company operating Line 5 — Enbridge — is violating an easement granted by the state more than 60 years ago. The easement allows Enbridge to move oil and natural gas under the Straits of Mackinac.

A letter sent to the governor and attorney general's offices alleges several violations of the easement, including corrosion on the pipeline walls and failure to meet thickness requirements.

Enbridge says the group is making false assumptions, but environmental leaders say the evidence is clear.


It was April of 2010 when Enbridge Line 6b ruptured, spilling more than a million gallons of Canadian heavy crude oil into a creek near Kalamazoo.

It was the largest inland spill in United States history.

That spill gave Michiganders a very good reason to sit up and pay closer attention to the nearly 3,300 miles of hazardous liquid pipelines that weave through our state, particularly Enbridge Line 5, which runs in the Straits of Mackinac.

Enbridge Energy has maintained that their twin oil and natural gas liquid pipelines under Lake Michigan at the Straits of Mackinac are safe.

But what if one of them did break open? Where might the oil go?

Today, the University of Michigan’s Water Center released new computer simulations to help answer that question.

David Schwab is a hydrodynamics expert with the Water Center.

“I don’t know any place where the currents are as strong, and change direction as quickly, and as frequently as in the Straits of Mackinac,” Schwab said.

Enbridge Energy’s Line 5 goes right under Lake Michigan at the Straits of Mackinac.

At the Straits, it splits into two pipelines. Both pipelines are 63 years old (they were installed in 1953).

Right now, we don’t have all the information about the condition of those pipelines. As we’ve reported many times, Enbridge holds all the cards. The company has shared some information with the public, but not a lot.

Recently released information about the condition of Enbridge’s Line 5 oil pipelines in the Straits of Mackinac shows some signs of corrosion. But company officials continue to say the twin pipelines running under Lake Michigan are safe.

There are many Michiganders feeling uneasy about the idea of those 62-year-old twin oil pipelines running along the bottom of the Straits of Mackinac.

The aging Line 5 can carry 540,000 barrels of oil and natural gas liquids each day.

Enbridge has made promises to keep the pipeline maintained and said it’s got an emergency response team in place, but there’s a complicating factor that no one can control: big, turbulent waves.

Pages