Prospect Ave-us 12 over Int Capitol-i 15
Fair Condition65 years old12,054 vehicles/day
Location
| State | Montana |
| County | Lewis and Clark |
| Location | Helena-prospect AVE |
| Carries | Prospect Ave-us 12 |
| Crosses | Int Capitol-i 15 |
| Coordinates | 46.59128, -111.99861 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 260.5 ft (79.4 m) |
| Max Span | 76.1 ft (23.2 m) |
| Deck Width | 31.8 ft (9.7 m) |
| Deck Area | 770.2 sq m |
| Main Spans | 4 |
| Year Built | 1961 |
Traffic
| Avg Daily Traffic | 12,054 (2023) |
| Truck Traffic | 1% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 4 |
Inspection & Ownership
| Last Inspection | 823 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | P00008046+12212 |