I 15 over Sep Sierra RD E
Good Condition64 years old6,202 vehicles/day
Location
| State | Montana |
| County | Lewis and Clark |
| Location | 4m N Helena |
| Carries | I 15 |
| Crosses | Sep Sierra RD E |
| Coordinates | 46.66055, -112.01141 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 120.4 ft (36.7 m) |
| Max Span | 46.6 ft (14.2 m) |
| Deck Width | 41.3 ft (12.6 m) |
| Deck Area | 462.4 sq m |
| Main Spans | 3 |
| Year Built | 1962 |
Traffic
| Avg Daily Traffic | 6,202 (2023) |
| Truck Traffic | 9% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 2 |
Inspection & Ownership
| Last Inspection | 923 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | I00015197+00391 |