1 | PRTD | Portland Traction Co. | added 10/1989; eliminated 7/1992; 1/1994-7/2005 | | NAKINA |
2 | PRTD | Portland Traction Co., Portland R.R. and Terminal Division | 10/1957-1/1980; eliminated 10/1989 | | NAKINA |
3 | PRTD | Portland Traction Co., Portland R.R. and Terminal Division | 10/57-1/80; eliminated 10/89 | | NRHS |
4 | PRTD | Portland Traction Co. | added 10/89; eliminated 7/92; 1/94-7/2000 | | NRHS |
5 | PRTD | PORTLAND TRACTION COMPANY | | | PWRC |
6 | PRTD | Portland Traction | | | RSRV |
7 | PRTD | PORTLAND TRACTION COMPANY | | | SCAC3 |