Need help identifying this locomotive

[bbruegeman]

These pictures were taken in 1989 in Douglas Wyoming. I'm look for some input on what railroad they belong.

 

[bcp]

Best guess:

From: Wyoming Short Lines & Industrial https://donsdepot.donrossgroup.net/dr234.htm

Pacific Power & Light Co.
Glenrock Coal Co.​

11, GP38AC, was built by Electro-Motive in December 1971, #37891, FN 5785-1. It was renumbered 511 and became GCCo 511. It was sold as Arizona Public Service Co 5.


Bruce