US 12 over Rr
Good Condition48 years old19,327 vehicles/day
Location
| State | Montana |
| County | Lewis and Clark |
| Location | 3m E Helena |
| Carries | US 12 |
| Crosses | Rr |
| Coordinates | 46.59121, -111.94707 |
Condition Ratings
| Overall Condition | Good |
| Deck | 8 (Very Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 275.9 ft (84.1 m) |
| Max Span | 107.9 ft (32.9 m) |
| Deck Width | 98.8 ft (30.1 m) |
| Deck Area | 2531.4 sq m |
| Main Spans | 3 |
| Year Built | 1978 |
Traffic
| Avg Daily Traffic | 19,327 (2023) |
| Truck Traffic | 1% |
| Lanes On Bridge | 4 |
Inspection & Ownership
| Last Inspection | 523 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | P00008047+09781 |