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About 300 gallons of diesel fuel leaked from a locomotive June 21, 2016, in the Columbia River Gorge, a Union Pacific spokesman said.

(The Oregonian/OregonLive/file)

About 300 gallons of diesel fuel leaked from an eastbound locomotive Tuesday night in the Columbia River Gorge, a Union Pacific spokesman confirmed.

The leak happened east of a bridge over the Sandy River, said Justin Jacobs, a Union Pacific spokesman. Authorities determined fuel didn't enter any waterways, Jacobs said in an email early Wednesday.

There are no "potential impacts" to the waterways, he said.

The majority of the fuel has evaporated or been collected, Jacobs said. Officials will do soil remediation and assure the fuel that's left is properly cleaned up, he said.

The 92-car train was stopped in the Bridal Veil area Tuesday night after the leak was detected. A fuel filter ring failure caused the leak, Jacobs said.

He said the problem isn't a common one and didn't know if it's checked for during regular maintenance. He didn't know how the fuel filter ring failure happened.

The train has been moved, he said, and the tracks are open.

The train was headed east from Portland, Jacobs said. No one was injured Tuesday night.

The leak comes on the heels of an oil train derailment that spilled 42,000 gallons of oil, sent a billowing cloud of black smoke into the air and created a small oil sheen on the Columbia River near the town of Mosier earlier this month.

Almost 300 people were evacuated from their homes because of the derailment, which also damaged the town's sewage treatment plant.

-- Jim Ryan

jryan@oregonian.com

503-221-8005; @Jimryan015