US 12 over Willow Creek
Fair Condition27 years old712 vehicles/day
Location
| State | Montana |
| County | Musselshell |
| Location | 4m NE Roundup |
| Carries | US 12 |
| Crosses | Willow Creek |
| Coordinates | 46.47008, -108.44038 |
Condition Ratings
| Overall Condition | Fair |
| Channel/Waterway | 7 (Good) |
| Culvert | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Culvert |
| Total Length | 21.7 ft (6.6 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Area | 55.4 sq m |
| Main Spans | 2 |
| Year Built | 1999 |
Traffic
| Avg Daily Traffic | 712 (2023) |
| Truck Traffic | 11% |
| 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 | P00014174+06061 |