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The colorful tug Island Viking pushes a barge down the ­Columbia River near Mosier in 2017. Tethered tug escorts could provide added protection for oil tankers on the Columbia River if tanker traffic increases.

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Oil tankers may need tug escort on Columbia

ASTORIA (AP) — Tethered tug escorts could provide added protection for oil tankers on the Columbia River if tanker traffic increases due to new marine terminals, a study commissioned by the Washington Legislature found.

December 15, 2017 1:15 p.m. read more..

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