| Name | Location | Status | Design | Year Built | Year Lost | Span Length | Total Length |
|---|---|---|---|---|---|---|---|
| Baring Creek Bridge | Going-To-The-Sun Road over Baring Creek | Unknown status | Closed-spandrel arch | 1932 | -- | -- | 71.9 ft. |
| Going-To-The-Sun Road Bridge | Going-To-The-Sun Road over Baring Creek | Open to traffic | Arch | 1932 | -- | 71.9 ft. | 71.9 ft. |
| Going-To-The-Sun Tunnel | Going-To-The-Sun Road under Rock formation | Open to traffic | Tunnel | 1934 | -- | -- | 395.0 ft. |
| Saint Mary Canal Bridge | CR 225 over Saint Mary Canal | Open to traffic | Truss | 1928 | -- | -- | 91.5 ft. |
| South Fork Cut Bank Creek Bridge | US 89 over South Fork Cut Bank Creek | Open to traffic | Arch | 1928 | -- | 20.0 ft. | 33.1 ft. |
| South Fork Milk River Bridge | US 89 over South Fork Milk River | Open to traffic | Arch | 1928 | -- | 20.7 ft. | 30.5 ft. |
| St. Marys River Bridge | CR 224 over St Marys River | Open to traffic | Through truss | 1915 | -- | 100.1 ft. | 201.1 ft. |
| Two Medicine River Bridge | US 2 over Two Medicine River | Open to traffic | Deck truss | 1941 | -- | 240.2 ft. | 740.8 ft. |