Tests confirm Line 5 in excellent condition

Much like homes, swimming pools, bridges, and highways, a pipeline system requires ongoing examination and upkeep. As part of its ongoing maintenance and inspection programs, Enbridge safely completed a hydrostatic test on both the east and west segments of the Line 5 crossing at the Straits of Mackinac. The test results are in and they confirm that Line 5 is in excellent condition.

Hydrostatic testing is a controlled test in which water is used to elevate pressure within a pipeline to confirm the condition of the pipeline.

Under the oversight and observation of several federal and state agencies Enbridge tested Line 5 to 1,200 pounds per square inch (psi). This is the same pressure to which Line 5 was tested when it was built in 1953, and is a pressure far above Line 5’s normal daily operating pressure of 150 psi.

The hydrotest is a regulatory and industry accepted way of confirming that ongoing maintenance and inspection programs are — and will continue to be — effective in keeping Line 5 operating safely into the future.

In addition to the hydrotest, this summer Enbridge is working to install additional anchor supports and planning to examine the coating along Line 5 in the Straits.

In the next few days the results of an independent study evaluating the operation of Line 5 in the Straits will be released. The findings will be important in laying out the next steps in the process the State created to review Line 5.

Michiganders have every reason to be proud of the critical role the region plays in Enbridge’s safe delivery of crude oil and natural gas liquids. They also should have peace of mind knowing Line 5 remains part of an advanced pipeline system designed to safely and efficiently meet their energy needs.

John Gauderman

Director of Operations, Great Lakes Region

Enbridge