See pages 24-25 of the December 1979 issue of TRAINS for the story
Its an Airplane! Its Chuck Norris! No, its just Amtrak.
The demise of this signal bridge is approaching.
UP's Milwaukee Sub overhead in the back ground...
Northbound Hiawatha
More than one transition in this shot: GN orange & green to Big Sky blue; train is now operated by Amtrak, on MILW from the Twin Cities to Chicago
"Morning Hiawatha"; parlor "Spring Valley" on rear