S 484 over Bear Creek
Powder River County, Montana · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- S 484 over Bear Creek in Powder River County, Montana, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 1999, making it 26 years old at the 2025 inventory.
- It carries about 20 vehicles a day (traffic count year 2023).
- Its listed owner is the county highway agency.
- It is one of 12 of the 23 inventoried bridges in Powder River County rated good (52.2%); 0 (0.0%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (45.21384, -106.18733)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Steel culvert |
| Length | about 29 ft |
| Location | 30M SE Ashland |
| NBI structure number | S00484026+04351 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Montana department of transportation.
Busiest bridges in Powder River County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 212 over Little Powder River | 1976 | 2,594 | Fair |
| US 212 over E Fk Little Powder River | 1983 | 2,594 | Fair |
| US 212 over E Fork Otter Creek | 1992 | 2,305 | Good |
| US 212 over Pumpkin Creek | 2012 | 2,197 | Good |
| US 212 over Powder River | 1985 | 2,084 | Good |
| S 59 over Mizpah Creek | 2001 | 742 | Good |
All bridges nearby: Powder River County, MT bridge conditions · every bridge in Powder River County · Montana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.