I 15 over Boulder River
Fair Condition46 years old1,928 vehicles/day
Location
| State | Montana |
| County | Jefferson |
| Location | 2.5m W Boulder |
| Carries | I 15 |
| Crosses | Boulder River |
| Coordinates | 46.25193, -112.17769 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 170.3 ft (51.9 m) |
| Max Span | 85.6 ft (26.1 m) |
| Deck Width | 44.3 ft (13.5 m) |
| Deck Area | 700.6 sq m |
| Main Spans | 3 |
| Year Built | 1980 |
Traffic
| Avg Daily Traffic | 1,928 (2023) |
| Truck Traffic | 13% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 524 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | I00015161+03811 |