IRR - I 90 over Little Bighorn River
Fair Condition70 years old2,693 vehicles/day
Location
| State | Montana |
| County | Big Horn |
| Location | 2.5m S Crow Agency |
| Carries | IRR - I 90 |
| Crosses | Little Bighorn River |
| Coordinates | 45.56831, -107.45222 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Tee Beam |
| Total Length | 155.8 ft (47.5 m) |
| Max Span | 60.0 ft (18.3 m) |
| Deck Width | 31.8 ft (9.7 m) |
| Deck Area | 460.8 sq m |
| Main Spans | 4 |
| Year Built | 1956 |
Traffic
| Avg Daily Traffic | 2,693 (2023) |
| Truck Traffic | 18% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 723 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | I00090511+06051 |