Reports are that the Virginia & Truckee also have gotten a new diesel. It is ex Pacific Power & Light ALCo S4 from Montana.
I don't believe that company does business in Montana. I know they are in Washington, Oregon, Idaho, Utah, California and Wyoming. Not sure where that engine could have been based, unless they have a coal mining interest over on the far east side? Boxcab E50
I am thinking perhaps Utah or Wyoming? Maybe there's something to be found out in Google-land? Boxcab E50