County Road 548 over Musselshell River 025
Musselshell County, Montana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- County Road 548 over Musselshell River 025 in Musselshell County, Montana, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 2013, making it 12 years old at the 2025 inventory.
- It carries about 100 vehicles a day (traffic count year 2025).
- Its listed owner is the county highway agency.
- It is one of 11 of the 28 inventoried bridges in Musselshell County rated fair (39.3%); 1 (3.6%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated April 2023, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (46.43928, -108.53669)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete tee beam |
| Length | about 116 ft |
| Location | Roundup |
| NBI structure number | L33548000+00001 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Montana department of transportation.
Busiest bridges in Musselshell County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 87 over Musselshell River | 1996 | 2,799 | Good |
| US 87 over Park Coulee | 1995 | 2,548 | Good |
| US 87 over Razor Creek | 1995 | 2,548 | Good |
| US 87 over South Willow Creek | 1976 | 1,223 | Good |
| US 12 over Willow Creek | 1999 | 712 | Fair |
| US 12 over Drainage | 2003 | 480 | Good |
All bridges nearby: Musselshell County, MT bridge conditions · every bridge in Musselshell County · Montana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.