S 518 over Int Montana City-i 15
Good Condition58 years old5,885 vehicles/day
Location
| State | Montana |
| County | Jefferson |
| Location | Montana City |
| Carries | S 518 |
| Crosses | Int Montana City-i 15 |
| Coordinates | 46.54057, -111.94493 |
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 | 296.9 ft (90.5 m) |
| Max Span | 75.1 ft (22.9 m) |
| Deck Width | 34.1 ft (10.4 m) |
| Deck Area | 941.2 sq m |
| Main Spans | 4 |
| Year Built | 1968 |
Traffic
| Avg Daily Traffic | 5,885 (2023) |
| Truck Traffic | 1% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 4 |
Inspection & Ownership
| Last Inspection | 324 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | S00518000+00001 |