I 90 over Harvey Creek
Granite County, Montana · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I 90 over Harvey Creek in Granite County, Montana, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 8 (very good condition) on the 0-9 scale.
- It was built in 1970, making it 55 years old at the 2025 inventory.
- It carries about 13,081 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 28 of the 73 inventoried bridges in Granite County rated good (38.4%); 9 (12.3%) 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 → (46.70513, -113.37213)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 8 | Very good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 22 ft |
| Location | 3M E Bearmouth Int |
| NBI structure number | I00090141+01001 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Montana department of transportation.
Busiest bridges in Granite County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 90 over Drainage | 1971 | 13,081 | Good |
| I 90 over Sep Bearmouth Road | 1970 | 13,081 | Good |
| I 90 over Clark Fork River | 1970 | 13,081 | Poor |
| I 90 over Rattler Gulch | 1971 | 13,081 | Fair |
| I 90 over Clark Fork River | 1970 | 11,802 | Fair |
| I 90 over Int Bearmouth | 1970 | 6,541 | Fair |
All bridges nearby: Granite County, MT bridge conditions · every bridge in Granite County · Montana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.