No Data Entered over Rock CR
Ravalli County, Montana · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- No Data Entered over Rock CR in Ravalli 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 1970, making it 55 years old at the 2025 inventory.
- It carries about 136 vehicles a day (traffic count year 1983).
- It is one of 12 of the 150 inventoried bridges in Ravalli County rated poor (8.0%); 12 (8.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (poor), but component ratings moved: deck 7 to 6.
- Its most recent inspection on record is dated October 2024, 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 → (46.06808, -114.22607)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 4 | 4 | Poor condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 46 ft |
| Location | No Data Entered |
| NBI structure number | 010302000000039 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2024 |
| 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 Ravalli County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 93 over Mill Creek | 2011 | 15,852 | Good |
| US 93 over Corvallis Canal | 1980 | 14,714 | Good |
| US 93 over Bitterroot River | 2005 | 14,573 | Fair |
| US 93 over Blodgett Creek | 2008 | 14,573 | Fair |
| US 93 over S Fork Bear Creek | 2011 | 13,924 | Fair |
| US 93 over N Fork Bear Creek | 2011 | 13,924 | Good |
All bridges nearby: Ravalli County, MT bridge conditions · every bridge in Ravalli County · Montana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.