It really also depends on how bad the flooding is in Fargo, because that is where the Builder actually crosses the Red River. Between Grand Forks and Fargo, the rail line runs parallel to IH-29 and is several miles from the river. So as long as it stays within those few miles, you'll be ok. I remember living in GFK in 2006 and the river got very high up that way. Driving down I-29 was like driving across a huge lake, with water on both sides. Yet the road was still open and the tracks next to it (which Amtrak uses) was still in use. And I'm almost sure the train was able to get through that year. It all just depends how bad Fargo gets and the farther north the ice jams, the better.