Anyone know these engines?

Are they not Former Virginia Railway Express Gp40p's? The last fan could be their HEP generator.

Definitely the VRE paint job. They've been replaced with mp36's

The rail shop at Hill is owned by the Army so the are probably there for a rebuild. Thanks for the info. 

As others stated, ex-VRE commuter locos.  The Army has announced plans to run passenger trains between two bases... (trying to remember which ones) when they need to move ground units for training exercises.  This is part of a deal with the state of VA to get the buses they currently use off I-95 and is suppose to be more green.  They might have also purchased former or about to be former VRE cars as well.

Ah, a little Google searching finds the project is now dead:

http://www.armytimes.com/news/...project-ends-031512/

But the Army still has the equipment.

Bob

I  can see this red passenger train with yellow letting.....

KRT coal facility in Ceredo WV has one of these units .