I 15 over Red Rock River
Fair Condition64 years old2,116 vehicles/day
Location
| State | Montana |
| County | Beaverhead |
| Location | 6.2m S Clark Canyon Dam |
| Carries | I 15 |
| Crosses | Red Rock River |
| Coordinates | 44.91605, -112.82427 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 143.0 ft (43.6 m) |
| Max Span | 51.8 ft (15.8 m) |
| Deck Width | 47.2 ft (14.4 m) |
| Deck Area | 627.8 sq m |
| Main Spans | 3 |
| Year Built | 1962 |
Traffic
| Avg Daily Traffic | 2,116 (2023) |
| Truck Traffic | 25% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | I00015038+04301 |