Like a great deal of the overall United States’ infrastructure, pipelines as far back as the early 20th Century are still in service.
According to federal data, 56% of oil pipelines and 60% of gas transmission lines were laid before 1970.
The Enbridge Energy Partners pipeline that burst near Marshall in July is 41 years old, and its line crossing the Straits of Mackinac was laid in 1954. Some pipelines in the state are older.
Yet oil and gas companies say that age is not the key to whether pipes are safe — it’s maintenance.
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