| Name | Location | Status | Design | Year Built | Year Lost | Span Length (ft.) | Total Length (ft.) |
|---|---|---|---|---|---|---|---|
| Great Porcupine Creek Bridge | CR 103 over Great Porcupine Creek | Open to traffic | Pony truss | 1912 | -- | 40.0 | 42.0 |
| Musselshell River Bridge | CR 118 over Musselshell River | Open to traffic | Pony truss | 1930 | -- | 120.1 | 140.1 |
| Rosebud Creek Bridge | MT 446 over Rosebud Creek | No longer exists | Truss | 1930 | 2005 | 123.0 | 123.0 |
| Tongue River Bridge | a ranch access road over Tongue River | Open to traffic | Pratt through truss | -- | -- | -- | -- |