IRR over Tongue River
Fair Condition56 years old877 vehicles/day
Location
| State | Montana |
| County | Rosebud |
| Location | Ashland |
| Carries | IRR |
| Crosses | Tongue River |
| Coordinates | 45.59778, -106.27505 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 8 (Very Good) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 4 (Poor) |
| Scour Critical | 3 — Scour critical |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 201.8 ft (61.5 m) |
| Max Span | 67.9 ft (20.7 m) |
| Deck Width | 41.7 ft (12.7 m) |
| Deck Area | 781.0 sq m |
| Main Spans | 3 |
| Year Built | 1970 |
Traffic
| Avg Daily Traffic | 877 (2023) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | S00447052+05081 |