| 1 | ROYX | Chartrand's Tank Car Service, Inc. | eliminated 1/1991 | | NAKINA |
| 2 | ROYX | TCL, Inc. | added 7/1973; 1/1975-1/1980; eliminated 10/1988 | | NAKINA |
| 3 | ROYX | Chartrand's Tank Car Service, Inc. | eliminated 1/91 | | NRHS |
| 4 | ROYX | TCL, Inc. | added 7/73; 1/75-1/80; eliminated 10/88 | | NRHS |
| 5 | ROYX | *TCL INC. | | | PWRC |
| 6 | ROYX | *CHARTRAND'S TANK CAR SERVICE, INC. | | | PWRC |
| 7 | ROYX | TCL | | | RSRV |
