Looks like some restoration has started on this old Alco as evidenced by the gray primer on the frame? The unit is former Boston & Maine 864.

North Star Steels radio controlled GP9 RE-1609 is picking up cars dropped off by the Santa Fe. The RE-1609 is ex-UP 254, ex-CNW 4398, ex-CKRY 4398. Kingman, AZ. 4-14-1998

North Star Steel SW9 1678, seen here at the CSX yard in Riverdale, IL, was built in December 1952 as Pennsylvania Railroad 8523 (later renumbered PRR 9123, PC 9123 and CR 9123).