IRR - I 90 over Little Bighorn River
Fair Condition67 years old3,889 vehicles/day
Location
| State | Montana |
| County | Big Horn |
| Location | 0.6m S Crow Agency |
| Carries | IRR - I 90 |
| Crosses | Little Bighorn River |
| Coordinates | 45.59663, -107.46161 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 164.4 ft (50.1 m) |
| Max Span | 51.8 ft (15.8 m) |
| Deck Width | 31.8 ft (9.7 m) |
| Deck Area | 486.0 sq m |
| Main Spans | 4 |
| Year Built | 1959 |
Traffic
| Avg Daily Traffic | 3,889 (2023) |
| Truck Traffic | 20% |
| 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 | I00090509+05612 |