S 500 over North Willow Creek
Good Condition51 years old33 vehicles/day
Location
| State | Montana |
| County | Petroleum |
| Location | 13m SW Mosby |
| Carries | S 500 |
| Crosses | North Willow Creek |
| Coordinates | 46.84322, -107.90026 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 118.1 ft (36 m) |
| Max Span | 56.1 ft (17.1 m) |
| Deck Width | 32.8 ft (10 m) |
| Deck Area | 360 sq m |
| Main Spans | 3 |
| Year Built | 1975 |
Traffic
| Avg Daily Traffic | 33 (2023) |
| Truck Traffic | 15% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 824 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | S00500023+00001 |