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Enbridge: Damaged Oil Pipeline Was Dented Less Than 1 Inch

Straits of Mackinac between Lake Michigan and Lake Huron Straits of Mackinac between Lake Michigan and Lake Huron |  Photo: WDIO-TV

Updated: May 14, 2018 03:25 PM

LANSING, Mich. (AP) - The company that operates twin oil pipelines in the Straits of Mackinac says one of the lines suspected of being struck by a tugboat anchor was dented more than three-fourths of an inch.

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Enbridge Inc. official Peter Holran told the Michigan Pipeline Advisory Board in Lansing Monday about the April 1 damage to the pipelines running between Lake Michigan and Lake Huron.

Company spokesman Ryan Duffy says each pipeline is about 20 inches in diameter with walls nearly an inch thick - but the thickness of the walls did not decrease.

Holran says the other pipe suffered two dents of just under three-quarters of an inch and less than a half-inch.

The suspected anchor strike also caused about 600 gallons of mineral oil insulation fluid to leak from two electric cables.

Associated Press correction: A previous version of the story stated the thickness of the pipelines' walls decreased from the dents, with the first dent being two-hundredths of an inch from rupturing. The dents did not decrease the wall thickness; they only pushed the walls in.

Copyright 2018 The Associated Press. All rights reserved.

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