| 1 | PWRB | PYREN, WALTER R | | | SCAC4 |
| 2 | PWRC | POWELL, RICH TRUCKING | | | SCAC3 |
| 3 | PWRE | POWER EXPRESS INC | | | SCAC4 |
| 4 | PWRF | POWERTRANS FREIGHT SYSTEMS INC | | | SCAC4 |
| 5 | PWRH | PACIFIC WEST REFRIGERATION LTD | | | SCAC4 |
| 6 | PWRJ | PWRS | | | SCAC4 |
| 7 | PWRN | PRUITT, W R TRUCKING | | | SCAC4 |
| 8 | PWRP | POWER PRESS SALES COMPANY | | | SCAC4 |
| 9 | PWRQ | PWR TRANSPORT LLC | | | SCAC4 |
| 10 | PWRR | PIEDMONT & WESTERN RAILROAD CLUB (OLD ROCK SCHOOL RAILWAY MUSEUM) | | | PWRC |
| 11 | PWRR | POWER TRANSPORT INC | | | SCAC3 |
| 12 | PWRR | POWER TRUCKING INC | | | SCAC4 |
| 13 | PWRS | POWERSOURCE TRANSPORTATION INC | | | SCAC4 |
| 14 | PWRT | POWERS TRANSPORT LTD | | | SCAC3 |
| 15 | PWRW | PRAIRIE WESTERN RECLAMATION & CONST | | | SCAC4 |
| 16 | PWRX | Pacific Western Resin Co. | 1/1994-7/2000 (not listed) | | NAKINA |
| 17 | PWRX | Pacific Western Resin Co. | 1/94-7/2000 | | NRHS |
| 18 | PWRX | PACIFIC WESTERN RESIN COMPANY | | | PWRC |
| 19 | PWRY | Peoria & Western | | USA | TRAFFIC |
| 20 | PWRZ | (PW) PROVIDENCE AND WORCESTER RAILROAD CO. | | | PWRC |
| 21 | PWRZ | Providence and Worcester Railroad | | | RSRV |
| 22 | PWRZ | PROVIDENCE AND WORCESTER RAILROAD C | | | SCAC4 |
