Lawmakers: Minn. Needs Stronger Oil Spill Response Hoping to avert disaster before it strikes, two state lawmakers introduced plans Wednesday to deal with the growing threat from railroad oil tanker spills. On average, ten oil tanker trains rumble through Minnesota each day, hauling huge quantities of North Dakota crude to refineries down south or out east. As oil rail traffic increases, people like Kathy Hollander want action. "This is oil transportation on steroids," Hollander said.