IRR BIA RTE 73 over Rotten Grass Creek
Fair Condition46 years old200 vehicles/day
Location
| State | Montana |
| County | Big Horn |
| Location | 10.6 Km SE Of ST Xavier |
| Carries | IRR BIA RTE 73 |
| Crosses | Rotten Grass Creek |
| Coordinates | 45.39378, -107.65964 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 4 (Poor) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 62.7 ft (19.1 m) |
| Max Span | 60.0 ft (18.3 m) |
| Deck Width | 34.1 ft (10.4 m) |
| Deck Area | 198.6 sq m |
| Main Spans | 1 |
| Year Built | 1980 |
Traffic
| Avg Daily Traffic | 200 (2024) |
| Truck Traffic | 20% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 624 |
| Inspection Frequency | Every 24 months |
| Owner | Bureau of Indian Affairs |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 00000000000C218 |