The U.S. Coast Guard closed a 15-mile stretch of the Ohio River on Tuesday after at least five thousand gallons of fuel oil spilled from a 60-year-old power plant owned by Duke Energy near Cincinnati, Ohio. The spill occurred late on Monday during a "routine transfer of fuel oil" at the W.C. Beckjord plant in New Richmond, Duke said. It began at 11:15 p.m. and was stopped 15 minutes later. It was not clear if the oil had been contained or if there was any impact on wildlife or drinking water. "We are still assessing the situation and any effects that may occur," a spokeswoman for the company said on Tuesday. Intake for drinking water has been closed on the river, she said.