Big Blow 19

The UP spent a lot of money experimenting with various technologies to get to high horsepower units that they hoped would reduce maintenance and provide efficient long haul power across Wyoming and Nebraska. I think this was the last generation of GE gas turbines before they scrapped them and resigned themselves to conventional diesel-electric transmissions. You could hear these things whining miles away hence the name.

Look at the horsepower on this train which (I think) is eastbound into Cheyenne just down off Sherman Hill.