I 15 over Big Hole River
Fair Condition53 years old1,926 vehicles/day
Location
| State | Montana |
| County | Madison |
| Location | 7.4m S Melrose |
| Carries | I 15 |
| Crosses | Big Hole River |
| Coordinates | 45.53059, -112.70374 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 452.8 ft (138 m) |
| Max Span | 115.2 ft (35.1 m) |
| Deck Width | 44.0 ft (13.4 m) |
| Deck Area | 1849.2 sq m |
| Main Spans | 3 |
| Year Built | 1973 |
Traffic
| Avg Daily Traffic | 1,926 (2023) |
| Truck Traffic | 24% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 124 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | I00015085+06652 |