Western Railroad Discussion > Utah Railway 5004 at Denver, Colorado

Retired Utah Railway 5004 laid over at UP's North Yard, Denver, CO, 7 July 2026.  Unit was headed to Utah State Railroad Museum in Ogden, Utah.



Edited 1 time(s). Last edit at 07/07/26 17:03 by cozephyr.

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What was the SP road number back in the 90's

czuleget Wrote:

> What was the SP road number back in the 90's

This wasn't one of the SP-painted-and-lettered units.  It started out as demonstrator MKCX 9901 in blue and gold:

https://www.trainorders.com/discussion/read.php?11,2904757

The locomotive known as Southern Pacific 503 was originally built as an MK5000C diesel-electric by Morrison-Knudsen in August 1994.  It was one of six demonstrator units tested on the Southern Pacific and Union Pacific railroads before being sold to the Utah Railway in November 2000.

Evan_Werkema Wrote:
-------------------------------------------------------
> czuleget Wrote:
>
> > What was the SP road number back in the 90's
>
> This wasn't one of the SP-painted-and-lettered
> units.  It started out as demonstrator MKCX 9901
> in blue and gold:

Great to get it in Denver alone for shot!

cozephyr Wrote:

> The locomotive known as Southern Pacific 503 was
> originally built as an MK5000C diesel-electric
> by Morrison-Knudsen in August 1994.  

According to Don Strack's site, The Diesel Shop, and the June 24 post on here announcing the acquisition, UTAH 5004 started life as MKCX 9901, and MKCX 9901 was never repainted or lettered for Southern Pacific.  The unit that started life as SP 503 became UTAH 5003, which is not the unit in your photo.

https://utahrails.net/utah-ry/utah-ry-diesel-index.html
https://www.thedieselshop.us/UTAH.HTML
https://www.trainorders.com/discussion/read.php?1,6190147