Station Road over Boulder River
Park County, Montana · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Station Road over Boulder River in Park County, Montana, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1947, making it 78 years old at the 2025 inventory.
- It carries about 1 vehicles a day (traffic count year 1993).
- It is one of 13 of the 126 inventoried bridges in Park County rated poor (10.3%); 13 (10.3%) 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 September 2023, on a 24-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (45.27362, -110.24917)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 4 | 4 | Poor condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 26 ft |
| Location | Box Canyon Admin Site |
| NBI structure number | 011101000000074 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 4: foundations stable, field review says exposed foundations need protection |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Montana department of transportation.
Busiest bridges in Park County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 90 over Int West Livingston | 1962 | 9,461 | Fair |
| I 90 over Int West Livingston | 1962 | 9,461 | Fair |
| I 90 over Int S Livingston-us Hwy | 1962 | 9,461 | Fair |
| I 90 over Quinn Creek Road | 2022 | 8,272 | Good |
| I 90 over Quinn Creek Road | 2022 | 8,272 | Good |
| I 90 over Int Hopper | 1978 | 8,236 | Fair |
All bridges nearby: Park County, MT bridge conditions · every bridge in Park County · Montana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.