Several ES44ACs destined for a railway in Columbia were in transit on NS in IL toward St Louis where they were handed over to BNSF.
http://www.locophotos.com/PhotoDetails.php?PhotoID=127820
See also: http://www.rrpicturearchives.net/showPicture.aspx?id=3266508
(Quite the contrast with the drab leading locos . . . [:-^] )
From this article: http://en.wikipedia.org/wiki/Cerrejón
"The company has its own 150 km 1,435 mm (4 ft 8 1⁄2 in) (standard gauge) railroad, connecting the mine to its coal-loading terminal at Puerto Bolívar on the Caribbean coast. There are two 128-car unit trains, each carrying 12,000 tons of coal per trip. The round-trip time for each train, including loading and unloading, is about 12 hours. The coal facilities at the port are capable of loading at peaks of 4,800 tons per hour on to vessels of up to 175,000 tons of dead weight."
See also this webpage about visiing the place (amazing !): http://www.cerrejon.com/site/english/our-company/visit-cerrejon.aspx
And: http://www.infomine.com/minesite/minesite.asp?site=cerrejon
- Paul North.