HWY 312 over Rr
Fair Condition22 years old401 vehicles/day
Location
| State | Montana |
| County | Yellowstone |
| Location | 1m W Pompey`s Pillar |
| Carries | HWY 312 |
| Crosses | Rr |
| Coordinates | 45.98822, -107.99298 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Prestressed Concrete Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 318.2 ft (97 m) |
| Max Span | 143.7 ft (43.8 m) |
| Deck Width | 34.1 ft (10.4 m) |
| Deck Area | 1008.8 sq m |
| Main Spans | 3 |
| Year Built | 2004 |
Traffic
| Avg Daily Traffic | 401 (2023) |
| Truck Traffic | 7% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 323 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | S00568000+00621 |