US 212 over Little Missouri River
Carter County, Montana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 212 over Little Missouri River in Carter County, Montana, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1965, making it 60 years old at the 2025 inventory.
- It carries about 2,642 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 27 of the 42 inventoried bridges in Carter County rated fair (64.3%); 2 (4.8%) are rated poor.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (45.03287, -104.42481)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 142 ft |
| Location | 1M NW Alzada |
| NBI structure number | P00023136+01271 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Montana department of transportation.
Busiest bridges in Carter County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 212 over Drainage | 1965 | 2,642 | Fair |
| US 212 over Thompson Creek | 1965 | 2,642 | Fair |
| US 212 over Willow Creek | 1955 | 2,285 | Fair |
| Chicago AVE over Russell Creek | 2019 | 480 | Good |
| Mormon Ave over Russell Creek 035 | 1940 | 480 | Fair |
| S 7 over Drainage | 1940 | 473 | Poor |
All bridges nearby: Carter County, MT bridge conditions · every bridge in Carter County · Montana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.