A 15-mile section of the Ohio River was reopened for limited traffic on Wednesday as clean-up of a 5,000-gallon fuel oil spill continued, the U.S. Coast Guard said on Wednesday. The Coast Guard closed a stretch of the river between Cincinnati, Ohio and Dayton, Kentucky on Tuesday after a spill during a "routine transfer of fuel oil" at a 60-year-old power plant owned by Duke Energy, 20 miles east of Cincinnati. "The river is open. Vessels can transit as long as they call the Coast Guard command center to get permission first," said Lt. Kate Cameron of the U.S. Coast Guard. Restrictions on traffic will continue as the clean-up progresses, the Coast Guard said, without giving a timeline.