Over here on the West End, all you can see are SD70's a few SD40-2's ( and an occasional AC) so if you're looking for some, go to grafton.
I believe most of the C-60AC's and alot of the C-44-9's, and AC4400's are working the Sand Patch Grade along with CSX's Pittsburgh division.... As it seems thats all you see through here... However I have caught a loner ole SD-80MAC working a coal mine spur, that found a weak spot in the rail right in the middle of my street crossing just below my house and cracked it clean through about a month ago! Which was something more then exciting to see the HUGE SD-80MAC in my neck of the woods! That old 132 pound rail wasn't completely solid and that ole SD-80 found the weak spot and/or a stress crack and finished the job...
the SD70M's are based in Flordia in Phosphate runs. They do however roam from time to time, but its rare and normally done for heavy shoping. the SD70MAC's are based in WV for the most part but roam system wide. Some are in helper service although CSX's True Helper service is made up of AC4400CW's (mostly XX and 1XX series) and SD50's (mostly mid to higher 85XX series)