I believe it was 1910 when NP and UP finally buried the hatchet and UP acquired its trackage rights on NP from Portland to Tacoma. This agreement also ended the long-running "railroad war" along the Deschutes River in central Oregon, where both roads where trying to build parallel lines.

Today's BNSF Oregon Trunk route incorporates segments of both the UP and NP routes, and UP still operates a local from The Dalles to Bend. In 2008, UP detoured several through freights onto the Oregon Trunk when its former SP main through the Cascades was severed for several months by a massive landslide near Oakridge.

As for the UP 457 pool train, having a 4-6-6-4 seems like an awful lot of power on what is essentially a water-level route. Coincidentally, is was this same year (1950) that UP turned its pool trains into the system's first "domeliner" by acquiring the four GM "Train of Tomorrow" domes and assigning them to this service.