Irr Route 46 over Big Sandy Creek
Hill County, Montana · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr Route 46 over Big Sandy Creek in Hill County, Montana, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 2 (critical condition) on the 0-9 scale.
- It was built in 1963, making it 62 years old at the 2025 inventory.
- It carries about 100 vehicles a day (traffic count year 2024).
- It is one of 3 of the 46 inventoried bridges in Hill County rated poor (6.5%); 3 (6.5%) are rated poor.
- 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 → (48.40924, -109.94428)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 4 | Poor condition |
| Substructure | 2 | Critical condition |
Bridge details
| Structure | Concrete channel beam |
| Length | about 25 ft |
| Location | 11 Km Nnw of Box Elder |
| NBI structure number | 0000C59205B0922 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Montana department of transportation.
Busiest bridges in Hill County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 2 over Little Box Elder Creek | 2011 | 3,678 | Good |
| US 2 over Drainage | 2011 | 3,678 | Good |
| US 2 over RR | 1960 | 3,539 | Fair |
| 7TH Ave N over RR | 1936 | 3,404 | Fair |
| US 87 over Beaver Creek | 1966 | 2,982 | Good |
| 7TH Ave N over Milk River | 1973 | 2,952 | Good |
All bridges nearby: Hill County, MT bridge conditions · every bridge in Hill County · Montana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.