Lee Creek Phosphate Mine

I saw that on a website that the Norfolk Southern train symbols 60Q and 61Q (something like that) were phosphate trains that ran between Chicago, IL and Lee Creek, NC (about 65 miles east of Greenville located near where the Pamlico River empties into the Pamlico Sound) and the westbound ran between Lee Creek and Chicago, IL and both of them ran via Raleigh, NC (the closest major city from where I live about 15 miles away) and I saw that the website said that the Lee Creek Phosphate train symbols were no longer used and were reassigned. Can i have some help please on what train symbols they have been reassigned to or any recently updated Norfolk Southern train symbols website.

Thanks,

Dennis