More than 2 inches of rain fell Monday in the Steamboat area, at Diamond Lake and at the Devils Graveyard north of Elkton, while several other places in Douglas County reported rainfall of between a half-inch to nearly an inch. With the rain came a spate of traffic accidents on county highways and freeways, many caused by motorists not allowing enough distance to stop, police said. “We have an entire summer’s worth of oil, dust and grit on the roads. It will take several days of rain to wash that material away,” said Oregon State Police Lt. Doug Ladd, commander …