September 1981:
787 from MP at Pueblo to the Roadside mine at Cameo with 100 empty cars marked DEGX.
788 from the Roadside mine at Cameo to Pueblo then via MP, ICG, and Mississippi Export to Mississippi Power at Daniel, MS.
789 from MP at Pueblo to the Beaver creek mine at Acco, UT with 100 empty cars marked DEGX.
790 from the Beaver creek mine at Acco, UT to Pueblo then via MP, ICG, and Mississippi Export to Mississippi Power at Daniel, MS.

October 1984 Update:
789 from MP at Osawatomie KS to the Beaver creek mine at Acco, UT with 100 empty cars marked DEGX.
790 from the Beaver creek mine at Acco, UT to Osawatomie KS, then via MP, ICG, and Mississippi Export to Mississippi Power at Daniel, MS.
787 and 788 interchange point changed from Pueblo to Osawatomie, KS.