US 191 over Yellowstone River
Fair Condition88 years old1,699 vehicles/day
Location
| State | Montana |
| County | Sweet Grass |
| Location | 1m N Big Timber |
| Carries | US 191 |
| Crosses | Yellowstone River |
| Coordinates | 45.84685, -109.93990 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel Continuous |
| Design | Girder and Floorbeam |
| Total Length | 379.9 ft (115.8 m) |
| Max Span | 122.0 ft (37.2 m) |
| Deck Width | 27.6 ft (8.4 m) |
| Deck Area | 972.7 sq m |
| Main Spans | 3 |
| Year Built | 1938 |
Traffic
| Avg Daily Traffic | 1,699 (2023) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 924 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | P00045000+09831 |