Railway line in Minnesota and Wisconsin
The Altoona Subdivision or Altoona Sub is a 90.7-mile (146.0 km) railway line owned and operated by the Union Pacific Railroad in the states of Minnesota and Wisconsin. The line originates in Saint Paul, Minnesota, crosses the St. Croix River on the Hudson Bridge into Hudson, Wisconsin, and eventually terminates in Altoona, Wisconsin where it connects to the Wyeville Subdivision.[1] This subdivision is formerly a Chicago and North Western Railway (C&NW) mainline,[2] on which the Twin Cities 400 operated in the mid 1900s.