IRR - S 73 over Little Bighorn River
Fair Condition46 years old548 vehicles/day
Location
| State | Montana |
| County | Big Horn |
| Location | Lodge Grass |
| Carries | IRR - S 73 |
| Crosses | Little Bighorn River |
| Coordinates | 45.31526, -107.35105 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 103.0 ft (31.4 m) |
| Max Span | 100.1 ft (30.5 m) |
| Deck Width | 46.3 ft (14.1 m) |
| Deck Area | 442.7 sq m |
| Main Spans | 1 |
| Year Built | 1980 |
Traffic
| Avg Daily Traffic | 548 (2023) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | December 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | S00463000+03221 |