Frontage Road 615 over Int Canyon-i 15
Good Condition58 years old100 vehicles/day
Location
| State | Montana |
| County | Cascade |
| Location | 11m SW Cascade |
| Carries | Frontage Road 615 |
| Crosses | Int Canyon-i 15 |
| Coordinates | 47.15417, -111.83952 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 184.1 ft (56.1 m) |
| Max Span | 86.6 ft (26.4 m) |
| Deck Width | 33.1 ft (10.1 m) |
| Deck Area | 566.6 sq m |
| Main Spans | 3 |
| Year Built | 1968 |
Traffic
| Avg Daily Traffic | 100 (2025) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 4 |
Inspection & Ownership
| Last Inspection | 424 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | L07615000+01601 |