Loads of empty centerbeams, dark colored diesels.. Looks like the Baloney Pony to me, er, uhm, Norfolk Southern...
Based on the centerbeam comment, I was thinking Washington State, Oregon or California perhaps. Or somewhere south, because of what looks to be open air engine facilities? Gotta go to bed, so no more search time today!
Only second Beginner win... Lucky guess too!! Plus I've been looking for the last 3 hours! Now, I gotta think about going to bed!
Hard to tell from the tops of UP locos these days! They get as black as the SP stuff... Imagine that!