S 91 over Int East Big Timber I 90
Fair Condition45 years old2,133 vehicles/day
Location
| State | Montana |
| County | Sweet Grass |
| Location | 2m E Big Timber |
| Carries | S 91 |
| Crosses | Int East Big Timber I 90 |
| Coordinates | 45.83207, -109.90885 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 322.8 ft (98.4 m) |
| Max Span | 111.9 ft (34.1 m) |
| Deck Width | 46.3 ft (14.1 m) |
| Deck Area | 1387.4 sq m |
| Main Spans | 4 |
| Year Built | 1981 |
Traffic
| Avg Daily Traffic | 2,133 (2023) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 4 |
Inspection & Ownership
| Last Inspection | 324 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | P00091003+00311 |