The Federal Railroad Administration said it has made a preliminary determination that the derailment of a crude oil train in Oregon earlier this month resulted from the failure of Union Pacific Corp. to maintain its track. The FRA said its preliminary investigation of the accident that occurred on June 3 near Mosier, Ore., found specifically that the derailment was caused by broken bolts that eventually allowed the rails to be pushed outward as trains moved across them. The findings were made in what the FRA said was a “preliminary factual findings report.” The report said the train was traveling at about 25 miles an hour, which was within the speed limit. A total of 16 tank cars derailed, it said. During the derailment, one tank car was punctured, which led to a fire of four […]