Enbridge says an oil pipeline beneath the Straits of Mackinac in northern Michigan has passed pressure tests required in a Justice Department agreement following a 2010 oil spill in southwestern Michigan.
The tests took place Saturday on one pipeline that's part of Line 5.
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The Canadian company pumped the line's west segment with water and kept pressure high for 8 hours. Enbridge officials told reporters in a conference call Monday that the line is fit for service and no leaks were found.
A second pipeline, called the east segment, will be tested soon.
The pipelines where Lake Huron and Lake Michigan converge were built in 1953. Line 5 carries about 23 million gallons (19 million imperial gallons) of crude oil and liquid natural gas daily between Superior, Wisconsin, and Sarnia, Ontario.