I 15 over Boulder River
Good Condition41 years old1,591 vehicles/day
Location
| State | Montana |
| County | Jefferson |
| Location | 4.3m S Basin |
| Carries | I 15 |
| Crosses | Boulder River |
| Coordinates | 46.26045, -112.33880 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 98.1 ft (29.9 m) |
| Max Span | 95.1 ft (29 m) |
| Deck Width | 46.6 ft (14.2 m) |
| Deck Area | 424.6 sq m |
| Main Spans | 1 |
| Year Built | 1985 |
Traffic
| Avg Daily Traffic | 1,591 (2023) |
| Truck Traffic | 16% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 424 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | I00015151+09402 |