US 287 over Sun River
Fair Condition90 years old538 vehicles/day
Location
| State | Montana |
| County | Lewis and Clark |
| Location | 4m NE Augusta |
| Carries | US 287 |
| Crosses | Sun River |
| Coordinates | 47.54786, -112.36494 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 8 (Very Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel Continuous |
| Design | Girder and Floorbeam |
| Total Length | 319.9 ft (97.5 m) |
| Max Span | 105.0 ft (32 m) |
| Deck Width | 27.6 ft (8.4 m) |
| Deck Area | 819 sq m |
| Main Spans | 3 |
| Year Built | 1936 |
Traffic
| Avg Daily Traffic | 538 (2023) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 823 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | P00009043+01451 |