CP is doing trackwork in the LaCrosse area, forcing periodic detours of Amtrak's number 8 to Chicago over BNSF. Westbound train 7 is running via its regular CP routing to LaCrosse. According to scanner chatter, Amtrak's 8 detours will also occur on 10/13, 10/17, and 10/18. In addition, you might have also seen some Amtrak equipment on the C&I last weekend, when the 20th Century Club special chartered it for a run to and from Savanna...
--Dorian--