| Name | Location | Status | Design | Year Built | Year Lost | Span Length | Total Length |
|---|---|---|---|---|---|---|---|
| Boulder River Bridge | CR 102 over Boulder River | Open to traffic | Pony truss | 1931 | -- | 75.1 ft. | 107.9 ft. |
| Boulder River Bridge | CR 102 over Boulder River | Open to traffic | Pony truss | 1931 | -- | 75.1 ft. | 111.9 ft. |
| Boulder River Bridge | CR 103 over Boulder River | Open to traffic | Pony truss | 1940 | -- | 105.0 ft. | 146.0 ft. |
| Boulder River CR 116 Bridge | CR 116 over Boulder River | No longer exists | Pony truss | ca. 1930 | 2002 | 92.9 ft. | 95.1 ft. |
| Sweetgrass Creek Bridge | CR 007 over Sweetgrass Creek | Open to traffic | Through truss | 1910 | -- | 89.9 ft. | 92.9 ft. |
| Sweetgrass Creek Bridge | CR 014 over Sweetgrass Creek | Open to traffic | Pony truss | 1910 | -- | 70.9 ft. | 70.9 ft. |
| West Boulder River Bridge | CR 143 over West Boulder River | Open to traffic | Pony truss | 1912 | -- | 60.0 ft. | 62.0 ft. |
| Yellowstone River Bridge | CR 028 over Yellowstone River | No longer exists | Through truss | 1911 | 2000 | 170.0 ft. | 378.0 ft. |