Old Boulder RD over Sep I 90 008
Fair Condition45 years old100 vehicles/day
Location
| State | Montana |
| County | Sweet Grass |
| Location | 1m E Big Timber |
| Carries | Old Boulder RD |
| Crosses | Sep I 90 008 |
| Coordinates | 45.82704, -109.93421 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 5 (Fair) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 285.8 ft (87.1 m) |
| Max Span | 100.1 ft (30.5 m) |
| Deck Width | 34.4 ft (10.5 m) |
| Deck Area | 914.5 sq m |
| Main Spans | 4 |
| Year Built | 1981 |
Traffic
| Avg Daily Traffic | 100 (2025) |
| Truck Traffic | 3% |
| 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 | L49103000+07001 |