BN
| Burlington Northern |
|
2
|
1
| BN |
BO
| Baltimore & Ohio |
|
0
|
1
| BO |
CNW
| Chicago & Northwestern |
|
0
|
3
| CNW |
CO
| Chesapeake & Ohio |
|
0
|
1
| CO |
DRGW
| Denver & Rio Grande Western |
|
0
|
1
| DRGW |
MP
| Missouri Pacific |
|
1
|
3
| MP |
NW
| Norfolk & Western |
|
1
|
0
| NW |
NYC
| New York Central |
|
0
|
1
| NYC |
SBD
| Seaboard System |
|
0
|
1
| SBD |
SOO
| Soo Line |
|
0
|
1
| SOO |
SOU
| Southern |
|
0
|
2
| SOU |
SP
| Southern Pacific |
|
2
|
4
| SP |
SSW
| St Louis Southwestern (Cotton Belt) |
|
0
|
1
| SSW |