US 310 over Rock Creek
Fair Condition92 years old4,561 vehicles/day
Location
| State | Montana |
| County | Carbon |
| Location | Rockvale |
| Carries | US 310 |
| Crosses | Rock Creek |
| Coordinates | 45.51785, -108.86258 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 7 — Countermeasures installed |
Physical Characteristics
| Material | Concrete |
| Design | Tee Beam |
| Total Length | 137.1 ft (41.8 m) |
| Max Span | 44.9 ft (13.7 m) |
| Deck Width | 42.3 ft (12.9 m) |
| Deck Area | 539.2 sq m |
| Main Spans | 3 |
| Year Built | 1934 (reconstructed 1968) |
Traffic
| Avg Daily Traffic | 4,561 (2023) |
| Truck Traffic | 7% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | P00004042+04541 |